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Composite diaphragm for electrolyzing Co and its preparation

A technology of composite diaphragm and electrolyte, applied in diaphragm, electrolysis process, electrolysis components, etc., can solve the problems of low density, leakage, and unsatisfactory effect.

Inactive Publication Date: 2009-07-22
甘肃省膜科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the pore size, porosity and liquid penetration rate of polyester filter cloth, it is difficult to meet the production requirements.
And the anti-Cl of polyester material 2 The performance is also poor, the service life is short, and frequent replacement is required
Because of its low density, it is necessary to maintain the required liquid level difference and exclude Cl 2 , it requires high-power vacuuming facilities, so that the energy consumption is higher, and the discharge of Cl 2 The effect is also unsatisfactory, often making Cl 2 Leakage in the production environment will cause serious pollution and damage the health of production operators

Method used

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  • Composite diaphragm for electrolyzing Co and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the ratio of polysulfone 12wt.%, dimethylformamide 58wt.%, dimethyl sulfoxide 29wt.%, polyvinylpyrrolidone 1wt.%, mix the components, heat and stir until completely dissolved, keep Stand still for defoaming; under the conditions of ambient temperature 25°C, humidity 30%, and casting liquid temperature 50°C, dip coating and roll pressing are used to laminate the film on the industrial filter cloth, evaporate for 10 minutes, immerse in water for phase inversion, and Dry at 150°C-180°C for 10 minutes.

Embodiment 2

[0025] According to the ratio of polysulfone 12wt.%, dimethylformamide 58wt.%, dimethyl sulfoxide 29wt.%, polyvinylpyrrolidone 1wt.%, mix the components, heat and stir until completely dissolved, keep Stand still for defoaming; under the conditions of ambient temperature 35°C, humidity 60%, and casting solution temperature 75°C, use the method of scraping to coat the industrial filter cloth, evaporate for 0.1 minute, immerse in water for phase inversion, at 50°C- Dry at 100°C for 60 minutes.

Embodiment 3

[0027] According to the ratio of polysulfone 12wt.%, dimethylformamide 58wt.%, dimethyl sulfoxide 29wt.%, polyvinylpyrrolidone 1wt.%, mix the components, heat and stir until completely dissolved, keep static Degassing; at an ambient temperature of 15°C, a humidity of 30%, and a casting liquid temperature of 30°C, the industrial filter cloth is laminated by dip coating and rolling, evaporated for 60 minutes, immersed in water for phase inversion, at 200 Dry at ℃-250℃ for 1 minute.

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Abstract

A method for preparing a cobalt electrolytic composite diaphragm, characterized in that an industrial filter cloth with good composite performance with the membrane material, uniform pores, and uniform thickness is selected as the base material, and the first component polymer, the second component polymer, and the solvent , non-solvent, and additives are used to make a casting solution, and the phase inversion method is used to form a microporous film on one or both sides of the industrial filter cloth substrate, and then the cobalt electrolytic composite diaphragm is made through post-processing. The invention has stable physical and chemical properties in the production process of cobalt electrolytic deposition, acid resistance and Cl2 resistance; long service life, reaching or exceeding half a year; no chlorine gas leakage; pore size, liquid permeability rate and filtration precision meet the production requirements of electrolytic cobalt.

Description

technical field [0001] The invention relates to the application of membrane technology in the field of electrolytic metallurgy, in particular to a method for preparing a cobalt electrolytic composite diaphragm. Background technique [0002] In the production practice of electrolytic metallurgy, an electrode diaphragm bag is needed to distinguish the anode and cathode. The electrolyte liquid level in the diaphragm bag must be higher than the electrolyte liquid level in the electrolytic cell and maintain a certain liquid level difference. At the same time, the aperture, porosity, and liquid permeability rate of each point of the diaphragm should be consistent, so that the metal can be evenly distributed. deposited on the cathode plate. This requires that the electrode separator bag has a suitable pore size, porosity and a certain liquid permeability rate. Since the electrolyte is an acidic solution and maintains a certain temperature, the diaphragm bag must have acid and tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22C25C7/04C25C1/08
Inventor 韩恩硕杨惠琳安兴才王庚平刘永聪
Owner 甘肃省膜科学技术研究院有限公司