Process for removing copper of cobalt electrolytic solution

A technology of electrolyte and copper removal agent, which is applied in the field of copper removal, can solve the problems affecting the quality of electrolytic cobalt products, such as the yield of valuable metals, and achieve the effect of ensuring product quality

Active Publication Date: 2005-03-23
LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It affects the quality of electrolytic cobalt products and the yield of valuable metals

Method used

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  • Process for removing copper of cobalt electrolytic solution
  • Process for removing copper of cobalt electrolytic solution
  • Process for removing copper of cobalt electrolytic solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] a Preparation of barium thiosulfate

[0040] Searching for BaS by Orthogonal Experimental Method 2 o 3 The best preparation conditions for

[0041] Table 1 Factor level table

[0042]

[0043] Note: ratio refers to NAS 2 o 3· 5H 2 O and BaCl 2 2H 2 The molar ratio of O is known from analysis, scheme C 2 A 2 B 1 for the best. which is:

[0044] ① Proportion 1:1

[0045] ②Temperature 20°C (close to room temperature)

[0046] ③ Stirring time 10min

[0047] In order to obtain relatively pure BaS 2 o 3 , the BaS 2 o 3 Rinse 3 times with hot water at about T≈60°C.

[0048] b Preparation of liquid cobalt thiosulfate copper remover

[0049] Using Orthogonal Experiments to Find the Best Preparation Conditions for Liquid Cobalt Thiosulphate Copper Removal Agent

[0050] Table 2 Factor level table

[0051]

[0052] Note: ratio refers to BaS 2 o 3 and CoSO 4 molar ratio

[0053] According to...

Embodiment 2

[0066] First, use sulfuric acid to adjust the value of the iron solution to a predetermined value, measure the solution, put it in a beaker, and place it in an electronic temperature-controlled water bath. And the temperature adjustment controller is preset to a predetermined temperature, and the temperature is raised while stirring slowly. When the temperature of the solution reaches the predetermined value, add an appropriate amount and start timing. After the reaction is completed, filter the solution and analyze the filtrate and residue components.

[0067] (2) Copper removal test with cobalt thiosulfate copper remover

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Abstract

A method of separating and removing impurity in electrolyte when cabalt is produced by electrolysis. The character of this invention using CoS2O3 as copper resistance, adding CoS2O3 in weight proportion of Cu2+:S2O32- =1:8-16 in electrolyte; adding acid and adjusting the pH between 0.5 and 2.0, at the temperature between 70deg.C and 90deg.C, the reaction time is 30-40min, then producing the precipitation of CuS, finally, filtrating and separating the precipitation the process of removing copper is finished. The method effectively overcomes the disadvantage of purifying and removing copper and iron with cobalt positive pole electrolyte, improves the depth of removing copper, decrease the cobalt content in residues, reduces the residues content and increases the straight yield.

Description

technical field [0001] The invention relates to a method for removing copper from a cobalt electrolyte, relating to a method for separating and removing impurities in the electrolyte, especially copper impurities, during electrolytic production of cobalt. Background technique [0002] At present, in the production process of cobalt electrolysis, it is necessary to purify and remove impurities from the electrolytic anolyte, especially to remove impurities such as copper and iron. At present, the copper removal process of cobalt electrolyte in the industry mostly adopts the sodium sulfide method. Although this method can basically meet the production needs, there are problems such as large amount of slag, high cobalt content in slag, and a large amount of Na that is brought into the electrolyte. + The disadvantages of other impurities. It affects the quality of electrolytic cobalt products and the yield of valuable metals. Contents of the invention [0003] The purpose of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C25C1/10
CPCY02P10/20
Inventor 常全忠毛西康马岩赵彩霞
Owner LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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