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Synthesis method of reagent nickel thiocarbonate for deeply removing copper from nickel solution

A technology of thiocarbonic acid and synthesis method, applied in nickel compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problem of not finding copper removal reagents, and achieve the effects of easy operation and control, simplification of process flow, and cost reduction

Inactive Publication Date: 2012-06-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is mainly because no efficient copper removal reagent has been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 78Kg of Na 2 Dissolve S in 1000L of water first, then add 60L of CS 2 solution, after 10 hours of reaction, Na 2 CS 3 solution; then with 1.2m 3 Nickel containing 59g / L, nickel sulfate solution with a pH of 4.0 was mixed, and after the reaction was carried out for 20 minutes, the nickel thiocarbonate precipitate was obtained by filtration; the prepared nickel thiocarbonate precipitate was treated with 128m 3 For the nickel sulfate solution containing 0.5g / L copper, the copper concentration drops to 0.0025g / L after 30 minutes of reaction, and the copper-nickel ratio in the copper-removing slag is 20.5.

Embodiment 2

[0044] 78Kg of Na 2 Dissolve S in 1000L of water first, then add 120L of CS 2 solution, after 24 hours of reaction, Na 2 C 2 S 5 solution; then with 2.0m 3 Nickel containing 62g / L, nickel chloride solution with a pH of 6.0 was mixed, and after the reaction was carried out for 10 minutes, the nickel thiocarbonate precipitate was obtained by filtration; the prepared nickel thiocarbonate precipitate was treated with 128m 3 For the nickel sulfate solution containing 0.5g / L copper, the copper concentration drops to 0.002g / L after 5 minutes of reaction, and the copper-nickel ratio in the copper removal slag is 18.6.

Embodiment 3

[0046] 142Kg of K 2 S 2 Dissolve in 1000L of water first, then add 65L of CS 2 solution, after 20 hours of reaction, K 2 CS 4 with K 2 C 2 S 6 The mixed solution; then with 1.8m 3 Nickel nitrate solution containing 60g / L and pH 5.2 was mixed, and after the reaction was carried out for 30 minutes, the nickel thiocarbonate precipitate was obtained by filtration; the prepared nickel thiocarbonate precipitate was treated with 128m 3 For the nickel sulfate solution containing 0.5g / L copper, the copper concentration drops to 0.0018g / L after 120 minutes of reaction, and the copper-nickel ratio in the copper-removing slag is 20.4.

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Abstract

The invention discloses a synthesis method of reagent nickel thiocarbonate for deeply removing copper from a nickel solution. The technical scheme is as follows: soluble sulfide CS2 and sulfur (S) are used as raw materials to firstly synthesize a thiocarbonate solution, and the thiocarbonate solution reacts with a nickel-containing solution to generate nickel thiocarbonate. The nickel thiocarbonate can efficiently removing copper from nickel electrolysis anolyte, so that the copper concentration is lower than 3 mg / L, and the ratio of copper to nickel in the copper removal slag is higher than 15:1.

Description

technical field [0001] The invention relates to the field of copper-nickel hydrometallurgy, in particular to a reagent synthesis method for deeply removing copper from a copper-nickel mixed solution. Background technique [0002] In the process of copper-nickel metallurgy, because of the very similar chemical properties of copper and nickel, it is very difficult to separate them in depth. Although solvent extraction and ion exchange can effectively separate copper and nickel, they are only suitable for processing small batches of solutions and cannot be used for large-scale industrial production. The study found that both copper and nickel have certain thiophilicity, but copper is more thiophilic in comparison. Most of the currently developed copper-nickel separation technologies are based on this characteristic, using various sulfides as separation reagents to achieve the purpose of selectively and efficiently separating copper from mixed solutions. However, most of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00
Inventor 赵中伟陈星宇陈爱良何利华孙培梅李洪桂
Owner CENT SOUTH UNIV
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