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Method for preparing high-purity nickel salt by recycling industrial nickel-containing wastewater

A nickel wastewater, high-purity technology, applied in metallurgical wastewater treatment, chemical instruments and methods, water pollutants, etc., can solve problems such as inability to achieve high-purity nickel sulfate, reduce outsourcing, high safety, and high purity. Effect

Active Publication Date: 2016-12-07
XIAMEN RUNNER IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts sulfonated kerosene as extraction agent, extracts, separates and removes the organic phase in the nickel sulfate solution, and after the method is processed, the organic matter remains 5%; it cannot meet the requirements of high-purity nickel sulfate, so this method is only used for nickel sulfate. preliminary purification

Method used

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  • Method for preparing high-purity nickel salt by recycling industrial nickel-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The method for the recovery of industrial nickel-containing waste water as above to prepare high-purity nickel salt, the specific steps are as follows:

[0040] (1) Collect industrial nickel-containing wastewater;

[0041] (2) Pass the nickel wastewater through a cation exchange resin that selectively adsorbs nickel to adsorption saturation;

[0042] (3) Carry out resin desorption regeneration to the cation exchange resin in step (2) with strong acid to obtain nickel salt solution; wherein Ni 2+ Concentration is 50g / l, pH value 2; Described strong acid is 5wt% sulfuric acid;

[0043] (4) Carry out gradient type pulse electrolysis to the nickel salt solution that step (3) obtains, the process parameter of electrolysis is:

[0044] Power supply: high frequency double pulse power supply, maximum peak current: 80A; maximum output voltage: 12V;

[0045] Anode: The electrolytic anode adopts DSA anode, and the DSA anode is an iridium-based or iridium-tantalum-coated titani...

Embodiment 2

[0057] The method for preparing high-purity nickel salt by reclaiming industrial nickel-containing wastewater, the specific steps are as follows:

[0058] (1) Collect industrial nickel-containing wastewater;

[0059] (2) Pass the nickel wastewater through a cation exchange resin that selectively adsorbs nickel to adsorption saturation;

[0060] (3) Carry out resin desorption regeneration to the cation exchange resin in step (2) with strong acid to obtain nickel salt solution; wherein Ni 2+ Concentration is 70g / l, pH value is 4; Described strong acid is 20wt% hydrochloric acid;

[0061] (4) Carry out gradient type pulse electrolysis to the nickel salt solution that step (3) obtains, the process parameter of electrolysis is:

[0062] Power supply: high frequency double pulse power supply, maximum peak current: 80A; maximum output voltage: 12V;

[0063] Anode: The electrolytic anode adopts DSA anode, and the DSA anode is an iridium-based or iridium-tantalum-coated titanium an...

Embodiment 3

[0075] The method for the recovery of industrial nickel-containing waste water as above to prepare high-purity nickel salt, the specific steps are as follows:

[0076] (1) Collect industrial nickel-containing wastewater;

[0077] (2) Pass the nickel wastewater through a cation exchange resin that selectively adsorbs nickel to adsorption saturation;

[0078] (3) Carry out resin desorption regeneration to the cation exchange resin in step (2) with strong acid to obtain nickel salt solution; wherein Ni 2+ The concentration is 60g / l, the pH value is 3; the strong acid is 12wt% sulfuric acid;

[0079] (4) Carry out gradient type pulse electrolysis to the nickel salt solution that step (3) obtains, the process parameter of electrolysis is:

[0080] Power supply: high frequency double pulse power supply, maximum peak current: 80A; maximum output voltage: 12V;

[0081] Anode: The electrolytic anode adopts a DSA anode, and the DSA anode is an iridium-based or iridium-tantalum-coate...

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Abstract

The invention discloses a method for preparing high-purity nickel salt by recycling industrial nickel-containing wastewater. Nickel salt in the industrial nickel-containing wastewater is purified, crystallized, recycled and reused, the three-level purifying process including the steps of nickel resin adsorption primary concentration and purification, pulse electrolysis impurity removing and the third-level purification of evaporation crystallization impurity removing is adopted, nickel metal salt is recycled, obtained nickel salt is high in purity with the impurity and metal ions lower than the international standards, and the outsourcing quantity of nickel metal salt materials is greatly reduced; in addition, the method is easy to implement, low in cost, high in safety and significant in economic and social value.

Description

technical field [0001] The invention belongs to the field of nickel-containing wastewater treatment, and in particular relates to a method for recovering and preparing high-purity nickel salt from industrial nickel-containing wastewater. Background technique [0002] Nickel sulfate / nickel chloride is mainly used to provide nickel salt for electroplating nickel and chemical nickel in the electroplating industry, and is an important electroplating raw material in the electroplating industry. Nickel metal salt solution is acidic, slightly soluble in acid and ammonia, and poisonous. It has obvious harm to aquatic organisms and has great pollution to the environment. In addition, nickel salts can cause allergic dermatitis and are also harmful to the human body. [0003] As a non-renewable resource, nickel metal salt will face resource depletion in decades. As the electroplating industry is a large user of nickel salt, how to realize the recycling of nickel metal salt is a prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42C25D21/16C25B1/00
CPCC02F1/42C02F2001/425C02F2101/20C02F2103/16C25B1/00C25D21/16
Inventor 林志敏傅盈盈蒋义锋季雪峰谢英伟杨玉祥
Owner XIAMEN RUNNER IND CORP
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