WO2003006399A1 - Fertilizer granules containing ammonium nitrate - Google Patents
Fertilizer granules containing ammonium nitrate Download PDFInfo
- Publication number
- WO2003006399A1 WO2003006399A1 PCT/EP2001/007969 EP0107969W WO03006399A1 WO 2003006399 A1 WO2003006399 A1 WO 2003006399A1 EP 0107969 W EP0107969 W EP 0107969W WO 03006399 A1 WO03006399 A1 WO 03006399A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fertilizer granules
- coating
- ammonium nitrate
- fertilizer
- weight
- Prior art date
Links
- 239000003337 fertilizer Substances 0.000 title claims abstract description 33
- 239000008187 granular material Substances 0.000 title claims abstract description 23
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000012188 paraffin wax Substances 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 239000012169 petroleum derived wax Substances 0.000 claims abstract description 12
- 235000019381 petroleum wax Nutrition 0.000 claims abstract description 12
- 150000001335 aliphatic alkanes Chemical class 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000007711 solidification Methods 0.000 claims abstract description 8
- 230000008023 solidification Effects 0.000 claims abstract description 8
- 239000001993 wax Substances 0.000 claims abstract description 8
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 7
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 18
- -1 phosphate ester Chemical class 0.000 claims description 10
- 229910019142 PO4 Inorganic materials 0.000 claims description 7
- 239000010452 phosphate Substances 0.000 claims description 7
- 150000003973 alkyl amines Chemical class 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 235000019271 petrolatum Nutrition 0.000 description 17
- 235000019809 paraffin wax Nutrition 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 150000001412 amines Chemical class 0.000 description 6
- 229910002651 NO3 Inorganic materials 0.000 description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 5
- NGLMYMJASOJOJY-UHFFFAOYSA-O azanium;calcium;nitrate Chemical compound [NH4+].[Ca].[O-][N+]([O-])=O NGLMYMJASOJOJY-UHFFFAOYSA-O 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 description 1
- 239000004264 Petrolatum Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001399 aluminium compounds Chemical class 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 229940077746 antacid containing aluminium compound Drugs 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 150000002193 fatty amides Chemical class 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000012184 mineral wax Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/38—Layered or coated, e.g. dust-preventing coatings layered or coated with wax or resins
Definitions
- fertilizer granules containing ammonium nitrate especially ammonium nitrate (AN) and calcium ammonium nitrate (CAN)
- AN ammonium nitrate
- CAN calcium ammonium nitrate
- EP-A-0 113 687 there is disclosed a treatment of the nitrate containing fertilizer with a mixture of mineral oil, mineral wax, alkylamine and a phosphate ester resulting into a protection against moisture of more than 60% compared to the blank. Later on, several improvements of water repellence have been published. Most of the processes have been based on addition of a mixture of active polar components with oil and petroleum wax blends.
- fatty amines and fatty alcohol's are fatty amines and fatty alcohol's (EP-A-0 574 306), carboxylic acid (or anhydride) and alcohol's or amines (EP-A-0 692 468), carboxylic acid (or corresponding metal salts) and fatty amide (EP-A-0 768 287), and mixtures of amine phosphate esters and amine sulphonates (EP-A-0 341 102).
- the invention relates to fertilizer granules containing ammonium nitrate and provided with a coating as protection against moisture uptake characterized in that the granules are coated with a petroleum wax which contains : alkanes with a carbon chain length between 18 and 40, with a linearity of the carbon chains higher than 40 %, solidification range being between 50 and 15 ° C and in that the petroleum wax is a paraffin or a hydrocarbon wax.
- paraffin and hydrocarbon waxes can improve the performance up to 60% compared to the blank, which is almost equal with blends from amines and phosphate esters.
- the paraffin waxes have to possess alkanes with a defined carbon chain length (C18-C40) as well as a specific linearity. A high amount (>55%) of normal alkanes is necessary to obtain a good performance.
- the solidification range of the paraffin mixture is of great importance: the best results have been obtained with blends, which have a solidification range between 50 and 15 °C.
- the efficiency of the coating can further be improved by adding a mixture of active polar organic compounds, preferably containing an alkylamine with a surface-active compound, more preferably containing a phosphate ester.
- the amount of active polar organic compounds added to the blend is preferably 0,01 - 15
- the amount of the paraffin wax added is 0,01 - 0,30 % by weight, based upon the total weight of the fertilizer granules and the coating, more preferably 0,06-0,15 % by weight. These small amounts of coating blend have proven to give satisfactory results.
- the invention will now further be described based upon data collected by means of experiments.
- the experiments have shown that the active components mainly contribute to the quality of the top layer. Both the appearance and the hardness improve substantially, especially after addition of a mixture of amine and phosphate ester.
- the different data were measured in the following way, and the experiments were carried out based upon 5 materials and procedures as described below.
- the fertilizers used stabilised calcic ammonium nitrate (27 % nitrogen) or ammonium nitrate (33.5 % nitrogen), has been purchased from Hydro Sluiskil, The Netherlands.
- the fertilizer 1.0 kilogram per sample is stored in sealed plastic jars in an oven at 35 °C for 16 hours. The treatment occurs as follows. The fertilizer is placed in a rotating coating drum, which has a
- Two 200-ml plastic beakers are both filled with 160 grams of (blank or treated) fertilizer. The weight of both the plastic beaker and the fertilizer are measured on an analytical balance. The combined weight is registered. The beakers are placed into a climatic chamber under the following conditions: relative humidity 80%, temperature 20 °C. After
- MP (MUb - MVs) * 100 % in which :
- the hardness of the top layer has been defined as follows :
- the hardness of the top layer has been inspected.
- the hardness can be determined by measuring the power (in Newton) necessary to penetrate the top layer.
- ammonium nitrate (33.5 % N) has been sprayed with 1000 ppm of paraffin (1-10).
- the performance of the individual petroleum waxes is:
- paraffin waxes with a high amount of linear alkanes (>55%) and a solidification range between 50 and 10 °C are able to protect ammonium nitrate containing fertilisers from moisture very efficiently.
- active polar components such as alkylamines and alkyl phosphate esters
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Abstract
Fertilizer granules containing ammonium nitrate and provided with a coating as protection against moisture uptake, in which the granules are coated with a petroleum wax which contains: alkanes with a carbon chain length between 18 and 40 with a linearity of the carbon chains higher than 40 %, the solidification range being between 50 and 15 °C, and in that the petroleum wax is a paraffin or hydrocarbon wax.
Description
Fertilizer granules containing ammonium nitrate
It is generally known that fertilizer granules containing ammonium nitrate, especially ammonium nitrate (AN) and calcium ammonium nitrate (CAN), easily absorb water during storage and handling. Hence, the particles can dissolve partly, followed by recrystallisation. This phenomenon causes weakening of the fertiliser granules as well as hardening of the top layer. Consequently, further handling and distribution on the soil will be hampered dramatically.
Addition of magnesium salts or aluminium compounds has led to an improvement of the hardness of nitrate containing granules. These type of fertilizers are nevertheless very sensitive towards moisture, so dissolution and recrystallisation of the nitrate salts can still occur.
In EP-A-0 113 687 there is disclosed a treatment of the nitrate containing fertilizer with a mixture of mineral oil, mineral wax, alkylamine and a phosphate ester resulting into a protection against moisture of more than 60% compared to the blank. Later on, several improvements of water repellence have been published. Most of the processes have been based on addition of a mixture of active polar components with oil and petroleum wax blends. Well-known examples are fatty amines and fatty alcohol's (EP-A-0 574 306), carboxylic acid (or anhydride) and alcohol's or amines (EP-A-0 692 468), carboxylic acid (or corresponding metal salts) and fatty amide (EP-A-0 768 287), and mixtures of amine phosphate esters and amine sulphonates (EP-A-0 341 102).
A number of patent publications describes the use of apolar components to reduce the moisture uptake by fertilizer salts. A remarkable performance of high molecular weight (30.000-5.000.000) viscoelastic elastomer has been disclosed in EP - A - 0 320 987 upon addition to a wax/oil blend to decrease the hygroscopicity of nitrate-containing fertilizer. Recently, it has been found that the water absorption of calcium salts can be lowered after treating the particle with a soluble nitrogen-containing material and a hydrophobic compound, preferably petrolatum having a melting point between 37.7 °C and 126.6 °C (WO-A-9817604).
This overview illustrates that there is still a need for a chemical product which can be used as an additive to ammonium nitrate fertilizer granules in order to improve the water absorption tendency of the granules, which chemical product must be added in small quantity, have a low prize and a good efficiency.
It is therefor an object of the invention to provide such a chemical product.
The invention relates to fertilizer granules containing ammonium nitrate and provided with a coating as protection against moisture uptake characterized in that the granules are coated with a petroleum wax which contains : alkanes with a carbon chain length between 18 and 40, with a linearity of the carbon chains higher than 40 %, solidification range being between 50 and 15 ° C and in that the petroleum wax is a paraffin or a hydrocarbon wax.
It has been found that paraffin and hydrocarbon waxes can improve the performance up to 60% compared to the blank, which is almost equal with blends from amines and phosphate esters.
The paraffin waxes have to possess alkanes with a defined carbon chain length (C18-C40) as well as a specific linearity. A high amount (>55%) of normal alkanes is necessary to obtain a good performance. In addition, the solidification range of the paraffin mixture is of great importance: the best results have been obtained with blends, which have a solidification range between 50 and 15 °C.
The efficiency of the coating can further be improved by adding a mixture of active polar organic compounds, preferably containing an alkylamine with a surface-active compound, more preferably containing a phosphate ester.
The amount of active polar organic compounds added to the blend is preferably 0,01 - 15
% by weight of the total weight of the blend.
Preferably the amount of the paraffin wax added is 0,01 - 0,30 % by weight, based upon the total weight of the fertilizer granules and the coating, more preferably 0,06-0,15 % by weight. These small amounts of coating blend have proven to give satisfactory results.
The invention will now further be described based upon data collected by means of experiments.
The experiments have shown that the active components mainly contribute to the quality of the top layer. Both the appearance and the hardness improve substantially, especially after addition of a mixture of amine and phosphate ester. The different data were measured in the following way, and the experiments were carried out based upon 5 materials and procedures as described below.
The carbon chain distribution of the petroleum waxes has been analysed at SGS Laboratory Services, Dordrecht, The Netherlands. Only linear alkanes with less than 40 carbon atoms could be determined and calculated, using identical standard samples of normal alkanes. The amount of both branched and cyclic alkanes could be estimated from 10 the adjacent peak of the linear alkane. The solidification range has been determined by using DSC (DSC-12E, Mettler, 0 °C - 100 °C / 100 °C - 0 °C, rate 5 °C/min).
15 The fertilizers used, stabilised calcic ammonium nitrate (27 % nitrogen) or ammonium nitrate (33.5 % nitrogen), has been purchased from Hydro Sluiskil, The Netherlands. Before applying the coating (stored at 100 °C for 16 hours), the fertilizer (1.0 kilogram per sample) is stored in sealed plastic jars in an oven at 35 °C for 16 hours. The treatment occurs as follows. The fertilizer is placed in a rotating coating drum, which has a
20 temperature of approximately 35 °C. Then 200-1500 ppm of a coating is sprayed on the fertilizer, followed by rotating the drum for another 5 minutes. The treated fertilizer is transferred into a plastic jar. After sealing the jar, the compounds are allowed to stand at room temperature for 24 hours.
25
Two 200-ml plastic beakers are both filled with 160 grams of (blank or treated) fertilizer. The weight of both the plastic beaker and the fertilizer are measured on an analytical balance. The combined weight is registered. The beakers are placed into a climatic chamber under the following conditions: relative humidity 80%, temperature 20 °C. After
30 72 hours, the samples are removed from the climatic chamber, followed by weighing and by evaluating the physical appearance. The protection against water (MP) uptake is calculated by the equation:
MP = (MUb - MVs) * 100 %
in which :
MP = Moisture Protection MUb = Average moisture uptake blank (g) MUs = Average moisture uptake sample (g) x 100 %
The appearance has been classified as follows:
1. Considerable degranulation
2. Moderate degranulation
3. Slight degranulation 4. Slight surface degranulation 5. Surface not degraded
The hardness of the top layer has been defined as follows :
By placing the samples, which have been used for the multiple layer moisture uptake tests, into an oven of 30 °C for 48 hours, the hardness of the top layer has been inspected. The hardness can be determined by measuring the power (in Newton) necessary to penetrate the top layer.
Description of the petroleum waxes explored
* Classification according to Concawe dossier no. 99/110, Concawe Brussels, Belgium.
The following specific tests have been performed :
Example 1
Calcium ammonium nitrate (27 % N) has been treated with 1000 ppm of petroleum wax (1-10). After one day the coated samples have been used for a multiple layer moisture uptake test. After standing 72 hours in the climatic chamber (relative humidity 80%, temperature 20 °C), the following results have been obtained :
This example demonstrates that petroleum waxes with a high amount of normal alkanes with a solidification range between 50 and 10 °C,wz. paraffin and hydrocarbon waxes 2-8, give the best performance with respect to moisture uptake. In addition, both the hardness and the appearance of the top layer have improved upon using paraffin waxes (2-8).
Example 2
Subsequently, ammonium nitrate (33.5 % N) has been sprayed with 1000 ppm of paraffin (1-10). Following the same procedures as mentioned above, the performance of the individual petroleum waxes is:
These experiments demonstrated the same trend as given in Example 1. Once again, linear alkanes with a carbon chain length between 18 and 40 were found to keep the fertiliser in the best condition after exposure to moisture. Especially paraffin waxes 3 and 4 showed a protection against moisture uptake, which can be compared with more advanced mixtures claimed by NSM (EP-A-0 113 687). In addition, the top layer appeared to be very soft after treating the ammonium nitrate with these particular paraffin waxes.
Example 3
The best paraffin waxes from Examples 1 and 2 have been selected, wz. 3 and 4, and tested further on. First, emphasis has been laid on the minimum dosage of the paraffin to a fertilizer (AN or CAN) to maintain still some moisture repellence. The results have been as follows :
Paraffin wax 3 on calcium ammonium nitrate
Paraffin wax 3 on ammonium nitrate
Paraffin wax 4 on ammonium nitrate
The tests have shown that very low concentrations of both paraffin waxes 3 and 4 can give already some water repellence on nitrate fertilizer. Moreover, the appearance and the hardness of the top layer can be improved, especially by addition of 1000 ppm (or more) paraffin. In the next example the influence of active components in paraffin mixtures to the overall performance has been investigated.
Example 4
As mentioned above, several active polar components have been claimed to decrease the hygroscopicity of nitrate containing fertilizers. Very often these formulations comprise fatty amines. We have selected the combination of alkylamine and alkyl phosphate ester, similar to the NSM patent EP-A-0 113 687.
The contribution of active components towards the protection against moisture uptake has been studied by adding 0-8% (m/m) stearylamine and 0-8% (m/m) of 2-ethylhexyl
phosphate ester to the paraffin wax 3. A dosage of 1000 ppm has been used for all formulations prepared.
Paraffin wax 3 with active components on calcium ammonium nitrate
Paraffin wax 3 with active components on ammonium nitrate
The experiments in Example 4 have demonstrated that the addition of amine and/or phosphate ester towards paraffin 3 hardly affects the performance towards water repellence on ammonium nitrate containing fertilisers. However, the active components contribute strongly to the quality of the top layer: the appearance as well as the hardness improves substantially.
The above mentioned tests have clearly demonstrated that paraffin waxes with a high amount of linear alkanes (>55%) and a solidification range between 50 and 10 °C are able to protect ammonium nitrate containing fertilisers from moisture very efficiently.
The addition of active polar components, such as alkylamines and alkyl phosphate esters, to the paraffin waxes does not lead to a better protection against moisture uptake. However, its addition results in a remarkable improvement of the top layer, not only towards the hardness, but towards the appearance as well.
Claims
1. Fertilizer granules containing ammonium nitrate and provided with a coating as protection against moisture uptake, characterized in that the granules are coated with a petroleum wax which contains: alkanes with a carbon chain length between 18 and 40 with a linearity of the carbon chains higher than 40 %, the solidification range being between 50 and 15 °C, and in that the petroleum wax is a paraffin or hydrocarbon wax.
2. Fertilizer granules according to any one of the preceding claims, characterized in that the coating contains a mixture of active polar organic components.
3. Fertilizer granules according claim 2, characterized in that active organic polar components contain an alkylamine with a surface-active compound.
4. Fertilizer granules according to claim 2, characterized in that the coating contains a phosphate ester.
5. Fertilizer granules according to claim 3, characterized in that the amount of the alkylamine is 0.01-15% by weight of the total weight of the hydrocarbon wax.
6. Fertilizer granules according to claim 4, characterized in that the amount of the alkyl phosphate ester is 0.01-15% by weight of the total weight of the hydrocarbon wax.
7. Fertilizer granules according to anyone of the claims 1-6, characterized in that the coating is 0.01-0.30% by weight, based upon the total weight of the fertilizer granules and the coating.
8. Fertilizer granules according to anyone of the claims 1-6, characterized in that the coating is 0.06-0.15% by weight, based upon the total weight of the fertilizer granules and the coating.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2001/007969 WO2003006399A1 (en) | 2001-07-10 | 2001-07-10 | Fertilizer granules containing ammonium nitrate |
| EP01965109A EP1404629A1 (en) | 2001-07-10 | 2001-07-10 | Fertilizer granules containing ammonium nitrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2001/007969 WO2003006399A1 (en) | 2001-07-10 | 2001-07-10 | Fertilizer granules containing ammonium nitrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003006399A1 true WO2003006399A1 (en) | 2003-01-23 |
Family
ID=8164502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2001/007969 WO2003006399A1 (en) | 2001-07-10 | 2001-07-10 | Fertilizer granules containing ammonium nitrate |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1404629A1 (en) |
| WO (1) | WO2003006399A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006082437A1 (en) * | 2005-02-04 | 2006-08-10 | The University Of York | Isolation and fractionation of waxes from plants |
| US10865159B2 (en) | 2015-11-16 | 2020-12-15 | Sabic Global Technologies B.V. | Methods of manufacture for coated granular fertilizers |
| US11021409B2 (en) | 2017-08-09 | 2021-06-01 | Sabic Global Technologies B.V. | Extruded fertilizer granules with urease and/or nitrification inhibitors |
| US11104618B2 (en) | 2015-07-20 | 2021-08-31 | Sabic Global Technologies B.V. | Fertilizer composition and methods of making and using same |
| US11124463B2 (en) | 2015-11-16 | 2021-09-21 | Sabic Global Technologies B.V. | Coated granular fertilizers, methods of manufacture thereof, and uses thereof |
| US11306037B2 (en) | 2017-04-19 | 2022-04-19 | Sabic Global Technologies B.V. | Enhanced efficiency fertilizer with urease inhibitor and nitrification separated within the same particle |
| US11345645B2 (en) | 2017-04-20 | 2022-05-31 | Sabic Global Technologies B.V. | Enhanced efficiency fertilizer with embedded powder composition |
| US11358908B2 (en) | 2017-04-19 | 2022-06-14 | Sabic Global Technologies B.V. | Enhanced efficiency fertilizer with urease inhibitor and nitrification inhibitor in separate particles |
| US11401218B2 (en) | 2014-05-05 | 2022-08-02 | Sabic Global Technologies B.V. | Coated granular fertilizers, methods of manufacture thereof, and uses |
| US11806689B2 (en) | 2016-02-08 | 2023-11-07 | Sabic Global Technologies B.V. | Method of making a fertilizer seed core |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1312314A (en) * | 1970-04-27 | 1973-04-04 | Armour Hess Chem Ltd | Coating compositions |
| US4150965A (en) * | 1977-04-28 | 1979-04-24 | Compagnie Neerlandaise De L'azote (Societe Anonyme) | Ammonium nitrate containing fertilizer pellets and a process of making same having a coating of C12 -C18 alkyl amine(s) and an overcoat of mineral oil |
| EP0113687A2 (en) | 1983-01-06 | 1984-07-18 | Hydro Agri Sluiskil B.V. | Ammonium nitrate containing fertilizer granules and coating mixture therefor |
| EP0341102A1 (en) | 1988-04-07 | 1989-11-08 | Compagnie Francaise De Produits Industriels | Products, compositions and anti-caking treatments for salts, single component and multinutrient fertilizers |
| EP0574306A1 (en) | 1992-06-11 | 1993-12-15 | Ceca S.A. | Process for the treatment of fertilisers by hydrophobe compositions in view of their bulk storage |
| EP0692468A1 (en) | 1994-07-13 | 1996-01-17 | C F P I | Process for the treatment of fertilisers to avoid moisture pick-up |
| EP0768287A1 (en) | 1994-05-25 | 1997-04-16 | Ici Canada Inc. | Improved coating for ammonium nitrate prills |
| WO1998017604A1 (en) | 1996-10-18 | 1998-04-30 | Tetra Technologies, Inc. | Moisture resistant calcium-containing particles |
-
2001
- 2001-07-10 WO PCT/EP2001/007969 patent/WO2003006399A1/en not_active Application Discontinuation
- 2001-07-10 EP EP01965109A patent/EP1404629A1/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1312314A (en) * | 1970-04-27 | 1973-04-04 | Armour Hess Chem Ltd | Coating compositions |
| US4150965A (en) * | 1977-04-28 | 1979-04-24 | Compagnie Neerlandaise De L'azote (Societe Anonyme) | Ammonium nitrate containing fertilizer pellets and a process of making same having a coating of C12 -C18 alkyl amine(s) and an overcoat of mineral oil |
| EP0113687A2 (en) | 1983-01-06 | 1984-07-18 | Hydro Agri Sluiskil B.V. | Ammonium nitrate containing fertilizer granules and coating mixture therefor |
| EP0341102A1 (en) | 1988-04-07 | 1989-11-08 | Compagnie Francaise De Produits Industriels | Products, compositions and anti-caking treatments for salts, single component and multinutrient fertilizers |
| EP0574306A1 (en) | 1992-06-11 | 1993-12-15 | Ceca S.A. | Process for the treatment of fertilisers by hydrophobe compositions in view of their bulk storage |
| EP0768287A1 (en) | 1994-05-25 | 1997-04-16 | Ici Canada Inc. | Improved coating for ammonium nitrate prills |
| EP0692468A1 (en) | 1994-07-13 | 1996-01-17 | C F P I | Process for the treatment of fertilisers to avoid moisture pick-up |
| WO1998017604A1 (en) | 1996-10-18 | 1998-04-30 | Tetra Technologies, Inc. | Moisture resistant calcium-containing particles |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006082437A1 (en) * | 2005-02-04 | 2006-08-10 | The University Of York | Isolation and fractionation of waxes from plants |
| US11401218B2 (en) | 2014-05-05 | 2022-08-02 | Sabic Global Technologies B.V. | Coated granular fertilizers, methods of manufacture thereof, and uses |
| US11104618B2 (en) | 2015-07-20 | 2021-08-31 | Sabic Global Technologies B.V. | Fertilizer composition and methods of making and using same |
| US10865159B2 (en) | 2015-11-16 | 2020-12-15 | Sabic Global Technologies B.V. | Methods of manufacture for coated granular fertilizers |
| US12234197B1 (en) | 2015-11-16 | 2025-02-25 | SABIC Agri-Nutrients Company | Coated granular fertilizers, methods of manufacture thereof, and uses thereof |
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| US11802097B2 (en) | 2017-04-19 | 2023-10-31 | Sabic Global Technologies B.V. | Enhanced efficiency fertilizer with urease inhibitor and nitrification separated within the same particle |
| US11358908B2 (en) | 2017-04-19 | 2022-06-14 | Sabic Global Technologies B.V. | Enhanced efficiency fertilizer with urease inhibitor and nitrification inhibitor in separate particles |
| US11306037B2 (en) | 2017-04-19 | 2022-04-19 | Sabic Global Technologies B.V. | Enhanced efficiency fertilizer with urease inhibitor and nitrification separated within the same particle |
| US12006273B2 (en) | 2017-04-19 | 2024-06-11 | SABIC Agri-Nutrients Company | Enhanced efficiency fertilizer with urease inhibitor and nitrification inhibitor in separate particles |
| US11345645B2 (en) | 2017-04-20 | 2022-05-31 | Sabic Global Technologies B.V. | Enhanced efficiency fertilizer with embedded powder composition |
| US11021409B2 (en) | 2017-08-09 | 2021-06-01 | Sabic Global Technologies B.V. | Extruded fertilizer granules with urease and/or nitrification inhibitors |
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| EP1404629A1 (en) | 2004-04-07 |
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