A method for deep copper removal in cobalt salt solution

A technology of solution and cobalt salt, which is applied in chemical instruments and methods, cobalt halides, cobalt compounds, etc., can solve the problems of difficult treatment of copper removal slag, and achieve the effects of improved treatment effect, high resource utilization rate and convenient operation

Active Publication Date: 2018-06-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that the copper removal slag produced after copper removal by the existing copper removal agent is difficult to handle, and to provide a method for deep copper removal of cobalt salt solution

Method used

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  • A method for deep copper removal in cobalt salt solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare 0.01mol / L Na 2 CS 3 solution, according to the formula: Na 2 CS 3 Added molar weight=n×total copper molar weight in the copper removal liquid-the remaining Co molar weight in the slag, by the amount that n is 1.4, add Na 2 CS 3 Add the solution into the container containing the second-stage copper removal slag. The molar amount of Co remaining in the copper slag is 0.0003mol. After dissolving at 25°C for 5 minutes, press Na 2 CS 3 Add CoCl to 1.2 times the molar amount 2 , stirred and reacted for 15 minutes, the stirring speed was 500r / min, and a regenerated copper removing agent was obtained.

[0038]Select 60mL of copper removal solution (60g / LCo, 0.5g / LCu), the total molar amount of copper in the copper removal solution is 0.00047mol, add the above-mentioned regenerated copper removal agent to carry out a stage of copper removal, and carry out solid-liquid separation to obtain One stage of copper removal slag and one stage of copper removal liquid, the...

Embodiment 2

[0043] Prepare 0.1mol / L Na 2 CS 3 solution, according to the formula: Na 2 CS 3 Added molar weight=n×total copper molar weight in the copper removal liquid-remaining Co molar weight in the slag, by the amount that n is 1.5, add Na 2 CS 3 Add the solution into the container containing the second-stage copper removal slag. The molar amount of Co remaining in the copper slag is 0.0003mol. After dissolving at 28°C for 30 minutes, press Na 2 CS 3 Add CoCl to 1.4 times the molar amount 2 , stirred and reacted for 20 minutes, the stirring speed was 700r / min, and a regenerated copper removing agent was obtained.

[0044] Select 60mL of copper removal solution (60g / LCo, 0.5g / LCu), the total molar amount of copper in the copper removal solution is 0.00047mol, add the above-mentioned regenerated copper removal agent to carry out a stage of copper removal, and carry out solid-liquid separation to obtain One stage of copper removal slag and one stage of copper removal solution, the ...

Embodiment 3

[0049] Prepare 1.5mol / L Na 2 CS 3 solution, according to the formula: Na 2 CS 3 Added molar weight=n×total copper molar weight in the copper removal liquid-remaining Co molar weight in the slag, by n being 1.6 times the amount of Na 2 CS 3 Add the solution into the container containing the second-stage copper removal slag, the molar amount of Co remaining in the copper slag is 0.0003mol, after dissolving at 30°C for 60min, press Na 2 CS 3 Add CoCl to 1.6 times the molar amount 2 , stirred and reacted for 30 minutes, the stirring speed was 800r / min, and a regenerated copper removing agent was obtained.

[0050] Select 60mg / L of copper removal solution (60g / LCo, 0.5g / LCu), the total molar amount of copper in the copper removal solution is 0.00047mol, add the above-mentioned regenerated copper removal agent to carry out a stage of copper removal and solid-liquid separation , obtain a section of copper removal slag and a section of copper removal solution, and the copper co...

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PUM

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Abstract

The invention relates to a method for deeply removing copper from a cobalt salt solution. A two-stage copper removal technology is adopted for removing copper from a cobalt chloride solution. A regenerated copper removal agent used in a first stage of copper removal is sourced from copper removal slag produced by a second stage of the copper removal, and finally qualified copper slag is discharged; and cobalt thiocarbonate is added in the second stage of the copper removal, so that a qualified copper-removed liquid is produced. The method provided by the invention has the advantages that the characteristic that the copper removal slag can be regenerated into the copper removal agent is fully utilized, copper concentration can be reduced to below 1mg / L, and copper removal slag with the copper-cobalt ratio higher than 15 / 1 is obtained.

Description

technical field [0001] The invention belongs to the field of heavy metal metallurgy, and relates to a method for deep copper removal in a cobalt salt solution, in particular to a technical method for deep separation of copper and cobalt. Background technique [0002] Cobalt is an important material for the preparation of components such as magnetic recording media, magnetic recording heads, optoelectronic devices, and integrated circuits. Cobalt with a purity of 99.999% or higher is used as a target for advanced electronic components. Cobalt chloride solution is often used as the main raw material for the production of cobalt salt and electric cobalt. Among them, the existence of impurity copper ions will seriously affect the product quality, and the copper concentration must be reduced to below 1mg / L. [0003] The traditional vulcanization method is widely used because of its advantages of simple operation, thorough copper removal and short time consumption, but the existi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/08
CPCC01G51/085C01P2006/80
Inventor 陈爱良李孟春钱振陈星宇刘旭恒李江涛车键勇
Owner CENT SOUTH UNIV
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