Claims
- 1. A process for manufacturing nickel chloride, comprising the steps of:
- pre-treating a waste nickel anode having a specific surface area and obtained from an electroplating factory of a steel manufacturing plant to remove impurities adhered on the surface of the waste nickel anode;
- working the pre-treated waste nickel anode into chips so as to provide an increased specific surface area;
- putting the worked waste nickel anode chips into an aqueous hydrochloric acid solution of 10-35% such that equivalence ratios of the number of equivalents of Ni inputted/number of equivalents of a target NiCl.sub.2 concentration and the number of equivalents of HCl inputted/number of equivalents of a target NiCl.sub.2 concentration are 1.0 or more, and dissolving said worked waste nickel anode chips at a reaction temperature of 20.degree.-80.degree. C. so as to form an aqueous nickel chloride solution having the target NiCl.sub.2 concentration, wherein the two equivalence ratios have the same target NiCl.sub.2 concentration;
- stopping the dissolving step by passing said aqueous nickel chloride solution through a filter to remove insoluble materials;
- placing said aqueous nickel chloride solution in an impurity treating tank and adding an alkaline compound to adjust the pH to 2-5;
- injecting an oxidizing gas into said aqueous nickel chloride solution in the impurity treating tank with the pH level maintained at 2-5 so as to form Fe and Cr ions into a sludge, and carrying out a filtering step; and
- adding a Ni powder in the amount of 0.1-2.0 g/l into said aqueous nickel chloride solution to remove heavy metal ions.
- 2. The process as claimed in claim 1, wherein the equivalence ratios are 1.0-1.5.
- 3. The process as claimed in claim 1, wherein the pre-treating step consists of acid-washing said waste nickel anode with an aqueous hydrochloric acid solution of 1-10 wt %.
- 4. The process as claimed in claim 1, wherein the pre-treating step is carried out by machining.
- 5. The process as claimed in claim 1, wherein said oxidizing gas is selected from the group consisting of oxygen and air.
- 6. The process as claimed in claim 1, wherein hydrogen peroxide is added at the dissolving step.
- 7. A process for manufacturing nickel chloride as a Zn--Ni electroplating material, comprising the steps of:
- working a waste nickel anode having a specific surface area obtained from an electroplating factory of a steel manufacturing plant into chips so as to provide an increased specific surface area;
- putting the worked waste nickel anode chips into an aqueous hydrochloric acid solution of 10-35% such that equivalence ratios of the number of equivalents of Ni inputted per liter/number of equivalents of a target NiCl.sub.2 concentration and the number of equivalents of HCl inputted per liter/number of equivalents of a target NiCl.sub.2 concentration are 1.0 or more, and dissolving the worked waste nickel anode chips at a reaction temperature of 20.degree.-80.degree. C. so as to form an aqueous nickel chloride solution having the target NiCl.sub.2 concentration, wherein the two equivalence ratios have the same target NiCl.sub.2 concentration;
- having the target NiCl.sub.2 concentration, wherein the two equivalence ratios have the same target NiCl.sub.2 concentration passing said aqueous nickel chloride solution through a filter to remove insoluble materials and adding KOH to adjust the pH to 2-5;
- placing said aqueous nickel chloride solution in an impurity treating tank;
- injecting an oxidizing gas into said aqueous nickel chloride solution in the impurity treating tank with the pH level maintained at 2-5 so as to form Fe and Cr ions into a sludge, and carrying out a filtering step; and
- adding a Ni powder in the amount of 0.1-2.0 g/l into said aqueous nickel chloride solution to remove heavy metal ions.
- 8. The process as claimed in claim 7, wherein the equivalence ratios are 1.0-1.5.
- 9. A process for manufacturing nickel chloride by using a waste nickel anode, comprising the steps of:
- pre-treating a waste nickel anode having a specific surface area obtained from an electroplating factory of a steel manufacturing plant to remove impurities adhered on a surface of the waste nickel anode;
- working the pre-treated waste nickel anode into chips so as to provide an increased specific surface area;
- putting the worked waste nickel anode chips into an aqueous hydrochloric acid solution of 10-35% such that equivalence ratios of the number of equivalents of Ni inputted per liter/number of equivalents of a target NiCl.sub.2 concentration and the number of equivalents of HCl inputted per liter/number of equivalents of a target NiCl.sub.2 concentration are 1.0 or more, and dissolving said worked waste nickel anode chips at a reaction temperature of 20.degree.-80.degree. C. so as to form an aqueous nickel chloride solution having the target NiCl.sub.2 concentration, wherein the two equivalence ratios have the same target NiCl.sub.2 concentration;
- stopping the dissolving step by passing said aqueous nickel chloride solution through a filter to remove insoluble materials;
- placing said aqueous nickel chloride solution in an impurity treating tank and adding an alkaline compound to adjust the pH to 2-5;
- injecting an oxidizing gas into said aqueous nickel chloride solution in the impurity treating tank with the pH level maintained at 2-5 so as to form Fe and Cr ions into a sludge, and carrying out a filtering step;
- adding a Ni powder in the amount of 0.1-2.0 g/l into said aqueous nickel chloride solution to remove heavy metal ions; and
- heat-concentrating said impurity treated nickel chloride into a crystalline powder.
- 10. The process as claimed in claim 9, wherein said crystalline powder phase includes at least one of NiCl.sub.2.H.sub.2 O, NiCl.sub.2.4H.sub.2 O. NiCl.sub.2.2H.sub.2 O and NiCl.sub.2.6H.sub.2 O.
- 11. The process as claimed in claim 9, wherein the equivalence ratios are 1.0-1.5.
- 12. The process as claimed in claim 2, wherein hydrogen peroxide is added at the dissolving step.
- 13. The process as claimed in claim 3, wherein hydrogen peroxide is added at the dissolving step.
- 14. The process as claimed in claim 4, wherein hydrogen peroxide is added at the dissolving step.
- 15. The process as claimed in claim 5, wherein hydrogen peroxide is added at the dissolving step.
- 16. The process as claimed in claim 10, wherein the equivalence ratios are 1.0-1.5.
- 17. The process as claimed in claim 1, wherein the pre-treating step includes acid-washing or mechanical milling.
- 18. The process as claimed in claim 9, wherein the pre-treating step includes acid-washing or mechanical milling.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1993/12393 |
Jul 1993 |
KRX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/392,846, filed as PCT/KR94/00082, Jul. 1, 1994 now abandoned.
US Referenced Citations (7)
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Dec 1982 |
JPX |
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SUX |
Non-Patent Literature Citations (1)
Entry |
A. R. Burkin, "Extractive Metallurgy of Nickel", Society of Chemical Industry, Critical Reports on Applied Chemistry vol. 17, 1987, pp. 120-146 (No Month). |
Continuations (1)
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Number |
Date |
Country |
Parent |
392846 |
Mar 1995 |
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