WO2002014220A1 - Method for manufacturing copper carbonate from in pcb corrosion waste liquid - Google Patents
Method for manufacturing copper carbonate from in pcb corrosion waste liquid Download PDFInfo
- Publication number
- WO2002014220A1 WO2002014220A1 PCT/KR2001/001329 KR0101329W WO0214220A1 WO 2002014220 A1 WO2002014220 A1 WO 2002014220A1 KR 0101329 W KR0101329 W KR 0101329W WO 0214220 A1 WO0214220 A1 WO 0214220A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- waste liquid
- cupric
- carbonate
- pcb corrosion
- pcb
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G3/00—Compounds of copper
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Definitions
- the present invention relates -to a process for producing cupric carbonate from waste liquid of PCB corrosion containing cupric chloride. More specifically, the present invention relates to a process for producing cupric carbonate from waste liquid of PCB corrosion which comprises adding a content of cupric oxide to waste liquid of PCB corrosion to remove free HCl, adding a neutralizing agent such as sodium carbonate ox sodium bicarbonate in order to neutralize to an appropriate pH to obtain cupric carbonate and NaCl, injecting carbonic acid gas thereto, and then washing and drying to produce a high purity of cupric carbonate.
- a neutralizing agent such as sodium carbonate ox sodium bicarbonate
- Waste liquid of PCB corrosion containing cupric chloride can be used to prepare cupric sulfate by an addition of cupric sulfate or to prepare cupric oxide by an addition of NaOH because it contains 10 to 12% of copper and 10 to 15% of HCl.
- the present inventors had developed a process for producing cupric carbonate from waste liquid of PCB corrosion containing cupric chloride on the basis of the above technical background.
- the present invention provides a process for converting basic cupric carbonate into cupric carbonate which comprises adding a certain content of cupric oxide (CuO) to waste liquid of PCB corrosion containing cupric chloride to remove free HCl, adding a neutralizing agent such as sodium carbonate or sodium bicarbonate thereto to obtain cupric carbonate and sodium chloride and injecting carbonic acid gas into the solution.
- CuO cupric oxide
- a neutralizing agent such as sodium carbonate or sodium bicarbonate thereto
- a content of cupric oxide (CuO) is added to waste liquid of PCB corrosion containing cupric chloride (1) to remove free HCl, sodium carbonate solution (2) is added thereto for neutralizing, the obtained liquid containing basic cupric carbonate is forced to circulate with pumps PI, P2 and P3 under stirring of a stirrer(4), a high pressure of carbonic acid gas is injected to a inlet of pump PI, and then the liquid is continuously circulated in maintaining an average pressure of 7 kg/cm 2 by the control of a supplying pressure of carbonic acid gas (1) with a valve to induce a combination in solution of a basic cupric carbonate (Cu (OH) 2 ) and carbonic acid(H 2 C0 3 ), to obtain cupric carbonate.
- Cu (OH) 2 basic cupric carbonate
- H 2 C0 3 carbonic acid(H 2 C0 3 )
- reaction formula is as follows; Cu(OH) 2 + H 2 C0 3 ⁇ CuC0 3 + 2H 2 0
- Figure 1 shows an example of an apparatus for producing cupric carbonate from waste liquid of PCB corrosion.
- Example 1 The present invention will be explained below in more detail by reference to Examples, but the invention should not be construed as being limited to these Examples in any way.
- Example 1
- Example 2 The same procedure as in Example 1 was conducted, except that sodium bicarbonate was used instead of sodium carbonate . As a result, 298 kg of cupric sulfate were produced.
- the present invention has advantages that carbonic acid gas is finely crushed to a molecular unit.
- it is possible to produce cupric carbonate having a high purity because fine particles of basic cupric carbonate is combined with carbonic acid gas by a pressure of 7 kg/cm 2 due to the formation of carbonic acid.
- cupric carbonate which is provided as a mineral for an animal feed is produced industrially in a great quantity since a pressure and breaking to fine particles are effectively controlled by the appropriate apparatus such as pumps and an injector of carbonic acid gas.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The present invention relates to a process for producing cupric carbonate from waste liquid of PCB corrosion. Waste liquid of PCB corrosion containing cupric chloride is being produced in a great quantity due to the industrial development. It is economical advantages that waste liquid of PCB corrosion is recycled to products such as cupric sulfate which is produced by an addition of sulfic acid and cupric oxide which is produced by an addition of sodium hydroxide because waste liquid of PCB corrosion contains usually copper of 10 to 12% and HCl of 10 to 15%. Accordingly, the present invention provides a process for producing cupric carbonate from waste liquid of PCB corrosion which comprises adding cupric oxide to waste liquid of PCB corrosion containing cupric chloride to remove free HCl, adding a neutrilizing agent such as sodium carbonate and sodium bicarbonate thereto to neutralize to a pH of 8-9, circulating forcedly the obtained liquid by pumps, and injecting carbonic acid gas under a pressure of 7 kg/cm2.
Description
METHOD FOR MANUFACTURING COPPER CARBONATE FROM IN PCB
CORROSION WASTE LIQUID
TECHNICAL FIELD The present invention relates -to a process for producing cupric carbonate from waste liquid of PCB corrosion containing cupric chloride. More specifically, the present invention relates to a process for producing cupric carbonate from waste liquid of PCB corrosion which comprises adding a content of cupric oxide to waste liquid of PCB corrosion to remove free HCl, adding a neutralizing agent such as sodium carbonate ox sodium bicarbonate in order to neutralize to an appropriate pH to obtain cupric carbonate and NaCl, injecting carbonic acid gas thereto, and then washing and drying to produce a high purity of cupric carbonate.
It is necessary to inhibit a formation of basic cupric carbonate depending on a certain condition of the reaction. It is difficult to obtain a high purity of cupric carbonate, if not.
BACKGROUND ART
Waste liquid of PCB corrosion containing cupric chloride can be used to prepare cupric sulfate by an addition of cupric sulfate or to prepare cupric oxide by an addition of NaOH because it contains 10 to 12% of copper and 10 to 15% of HCl.
The present inventors had developed a process for producing cupric carbonate from waste liquid of PCB corrosion containing cupric chloride on the basis of the above technical background.
DISCLOSURE OF THE INVENTION
The present invention provides a process for converting basic cupric carbonate into cupric carbonate which comprises adding a certain content of cupric oxide (CuO) to waste liquid of PCB corrosion containing cupric chloride to remove free HCl, adding a neutralizing agent such as sodium carbonate or sodium bicarbonate thereto to obtain cupric carbonate and sodium chloride and injecting carbonic acid gas into the solution.. The present invention will be explained below in more detail by reference to the attached drawings .
A content of cupric oxide (CuO) is added to waste liquid of PCB corrosion containing cupric chloride (1) to remove free HCl, sodium carbonate solution (2) is added thereto for neutralizing, the obtained liquid containing basic cupric carbonate is forced to circulate with pumps PI, P2 and P3 under stirring of a stirrer(4), a high pressure of carbonic acid gas is injected to a inlet of pump PI, and then the liquid is continuously circulated in maintaining an average pressure of 7 kg/cm2 by the control of a supplying pressure of carbonic
acid gas (1) with a valve to induce a combination in solution of a basic cupric carbonate (Cu (OH) 2) and carbonic acid(H2C03), to obtain cupric carbonate.
The reaction formula is as follows; Cu(OH)2 + H2C03 → CuC03 + 2H20
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows an example of an apparatus for producing cupric carbonate from waste liquid of PCB corrosion.
BEST MODE FOR CARRYING OUT OF THE INVENTION
The present invention will be explained below in more detail by reference to Examples, but the invention should not be construed as being limited to these Examples in any way. Example 1
1000 kg of PCB corrosion waste liquid containing 10% of copper content are added to a container having a volume of 3000 Z . Under stirring, 60kg of cupric oxide are added thereto to remove free HCl and subjected to an addition of sodium carbonate in order to adjust a pH of 8 to 9 to obtain a solution containing basic cupric carbonate and cupric carbonate. The solution is carried to a vessel of the apparatus according to the present invention. Carbonic acid gas is dispersedly provided thereto at a speed of 50 kg per hour keeping a pressure of 7 kg/cm2 by the pumps PI, P2 and P3,
and reacted for 3 hours to produce 295 kg of cupric sulfate.
Example 2
The same procedure as in Example 1 was conducted, except that sodium bicarbonate was used instead of sodium carbonate . As a result, 298 kg of cupric sulfate were produced.
INDUSTRIAL APPLICABILITY
The present invention has advantages that carbonic acid gas is finely crushed to a molecular unit. In the present invention, it is possible to produce cupric carbonate having a high purity because fine particles of basic cupric carbonate is combined with carbonic acid gas by a pressure of 7 kg/cm2 due to the formation of carbonic acid. According to the present invention, cupric carbonate which is provided as a mineral for an animal feed is produced industrially in a great quantity since a pressure and breaking to fine particles are effectively controlled by the appropriate apparatus such as pumps and an injector of carbonic acid gas.
Claims
1. A process for producing cupric carbonate from waste liquid of PCB corrosion characterized in that comprises; adding cupric oxide to waste liquid of PCB corrosion containing cupric chloride to remove free HCl, adding a neutralizing agent such as sodium carbonate and sodium bicarbonate thereto to neutralize to a pH of 8-9, circulating forcedly the obtained liquid by pumps, injecting carbonic acid gas under a pressure of 7 kg/cm2 to induce a combination in solution of a basic cupric carbonate and carbonic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2001275829A AU2001275829A1 (en) | 2000-08-11 | 2001-08-04 | Method for manufacturing copper carbonate from in pcb corrosion waste liquid |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20000046528A KR100650927B1 (en) | 2000-08-11 | 2000-08-11 | Method for producing copper carbonate from PCB corrosion waste liquid |
| KR2000/0046528 | 2000-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002014220A1 true WO2002014220A1 (en) | 2002-02-21 |
Family
ID=19682779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2001/001329 WO2002014220A1 (en) | 2000-08-11 | 2001-08-04 | Method for manufacturing copper carbonate from in pcb corrosion waste liquid |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100650927B1 (en) |
| AU (1) | AU2001275829A1 (en) |
| WO (1) | WO2002014220A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100961928B1 (en) | 2008-05-20 | 2010-06-10 | 주식회사 태원 | Method for preparing basic copper carbonate using copper chloride waste solution |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900224A (en) * | 1996-04-23 | 1999-05-04 | Ebara Corporation | Method for treating wastes by gasification |
| US5980858A (en) * | 1996-04-23 | 1999-11-09 | Ebara Corporation | Method for treating wastes by gasification |
-
2000
- 2000-08-11 KR KR20000046528A patent/KR100650927B1/en not_active Expired - Fee Related
-
2001
- 2001-08-04 AU AU2001275829A patent/AU2001275829A1/en not_active Abandoned
- 2001-08-04 WO PCT/KR2001/001329 patent/WO2002014220A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900224A (en) * | 1996-04-23 | 1999-05-04 | Ebara Corporation | Method for treating wastes by gasification |
| US5980858A (en) * | 1996-04-23 | 1999-11-09 | Ebara Corporation | Method for treating wastes by gasification |
| US6063355A (en) * | 1996-04-23 | 2000-05-16 | Ebara Corporation | Method for treating wastes by gasification |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100650927B1 (en) | 2006-11-28 |
| AU2001275829A1 (en) | 2002-02-25 |
| KR20020013614A (en) | 2002-02-21 |
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