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Production method of high purity cobalt

A high-purity, cobalt-salt technology, which is applied in photographic technology, instruments, and photographic auxiliary processes, can solve problems such as electrolyte pollution, high energy consumption, and high production costs.

Inactive Publication Date: 2013-05-22
苏州晶纯新材料有限公司
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Problems solved by technology

The method uses electrolysis to prepare CoCl 2 The solution also has the problems of high production cost and large energy consumption
In addition, CoCl 2 The solution will produce corrosive HCl mist during the electrolysis process, causing serious damage to equipment and instruments
These corroded equipment and instruments may also pollute the electrolyte

Method used

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  • Production method of high purity cobalt

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Embodiment Construction

[0011] The production process steps of high-purity cobalt of the present invention are as follows:

[0012] (1) Preparation of cobalt salt solution. (1a) Prepare a certain volume of CoSO with a target cobalt concentration of 60-100g / L 4 solution, calculate the required high-purity cobalt sulfate CoSO 4 .7H 2 The relative proportion of O and deionized water, the resulting weight of high-purity cobalt sulfate CoSO 4 .7H 2 O and deionized water were placed in a container and stirred at room temperature until CoSO 4 .7H 2 O is completely dissolved. Then add sulfuric acid H 2 SO 4 Adjust the pH of the cobalt salt solution to 1-3. Or (1b) prepare a certain volume, the target cobalt concentration is 60 ~ 100g / L, CoSO 4 and CoCl 2 A certain percentage of CoSO 4 and CoCl 2 Mix the solution and calculate the required high-purity cobalt sulfate CoSO 4 .7H 2 O, high-purity cobalt hydrochloride CoCl 2 .6H 2 O, and the relative ratio of deionized water, the high-purity coba...

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Abstract

The invention relates to a production method of high purity cobalt. The method is characterized in the following steps that: (1) a CoSO4 solution or a mixed solution of CoSO4 and CoCl2 is purified through an ion exchange process and an active carbon adsorption process; (2) the purified cobalt salt solution is delivered to an electrolyte tank, and is subject to an electrowinning process; (3) the electrowon cobalt is subject to a vacuum degassing process and a vacuum smelting process, such that a high purity cobalt cast ingot is produced. Ion exchange resins used in the present invention at least comprise Diphonix resin which has a special effect in Fe removing, and M-4195 resin which has a special effect in Ni removing. The active carbon adsorption process is carried out after the ion exchange process. The high purity cobalt produced with the method provided by the present invention reaches a purity of 99.99% to 99.9999%, and has low gas content.

Description

technical field [0001] A method for producing high-purity cobalt, which involves ion exchange of cobalt salt solution, adsorption and purification treatment of activated carbon, electrowinning of cobalt, vacuum degassing of electrolytic cobalt, and vacuum smelting of ingots. Background technique [0002] High-purity cobalt is an important electronic material. High-purity cobalt with a purity of 99.9-99.99% is widely used in computer hard disks. Cobalt with higher purity, such as cobalt with a purity of 99.99-99.9995%, is a very critical contact layer material in computer chips. [0003] Regarding the production method of high-purity cobalt, known patents include US Patent No. US6818119, US6843896, Japanese Patent No. JP11193483, Chinese Patent Publication Nos. CN101538721 and CN101302585. [0004] US patents US6818119 and US6843896 disclose a method, CoSO 4 solution and CoCl 2 The solution was ion exchanged, solvent extracted, Fe[OH] 3 Precipitation and recrystallizatio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B23/06C25C1/08
Inventor 王广欣钟小亮
Owner 苏州晶纯新材料有限公司
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