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Method for removing chlorine from zinc or manganese electrolyte through using Sn (II) compound

A zinc electrolyte and compound technology, which is applied in photographic crafts, instruments, photographic auxiliary crafts and other directions, can solve the problems of difficult craftsmanship, high production cost, expensive silver salt, etc., and achieves convenient operation, good dechlorination effect, and simple craftsmanship. Effect

Inactive Publication Date: 2013-01-02
JISHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. Copper slag dechlorination method: its principle is based on the addition of copper and copper ions and Cl in the electrolyte - The ions interact to form insoluble CuCl precipitates, but the chlorine removal efficiency of this method is not high, the process is difficult to master, the production cost is high, and it is rarely used in actual production
This method is simple to operate and has good chlorine removal effect, but the silver salt is expensive and difficult to implement in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment one: containing Cl in 1000mL - Ion 1640mg / L zinc electrolyte, add Sn(OH) 2 7.4g, stirring constantly, with dilute H 2 SO 4 Adjust the pH value of the solution to 1.0, filter after 1.5 hours, Cl in the filtrate - The ion concentration is 90.2 mg / L, and the removal rate of chlorine is 94.5%.

Embodiment 2

[0011] Embodiment two: containing Cl in 1000mL - Ion 1640mg / L zinc electrolyte, add SnO 13.0g, keep stirring, use dilute H 2 SO 4 Adjust the pH value of the solution to 1.0, filter after 1.5 hours, Cl in the filtrate - The ion concentration is 98.2 mg / L, and the removal rate of chlorine is 94.0%.

Embodiment 3

[0012] Embodiment three: containing Cl in 1000mL - Ion 1068mg / L manganese electrolyte, add SnO 12.8g, keep stirring, use dilute H 2 SO 4 Adjust the pH value of the solution to 1.5, filter after 2.0 hours, Cl in the filtrate - The ion concentration is 80.5mg / L, and the removal rate of chlorine is 92.5%.

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PUM

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Abstract

The invention relates to a method for removing chlorine from a zinc or manganese electrolyte through using an Sn (II) compound. The method comprises the following steps: adding the Sn (II) compound to the zinc or manganese electrolyte containing Cl<-> according to a molar ratio of Sn (II) to Cl<-> of 0.8-2.0:1; and adjusting the pH value of the resultant solution to 1.0-3.0 through using dilute H2SO4 under continuous stirring to make Sn<2+> hydrolyze to an insoluble Sn(OH)Cl precipitate in the presence of Cl<->; and filtering the resultant solution after the Cl<-> content is qualified through detection to obtain a filtrate which can be used for subsequent electrolytic production technologies and a filter residue Sn(OH)Cl, and regenerating the Sn(OH)Cl with an NaOH solution to generate Sn(OH)2 which can by recycled.

Description

technical field [0001] The invention relates to the purification and dechlorination technology of electrolyte solution in hydrometallurgy and manganese smelting, which belongs to hydrometallurgy technology. Background technique [0002] Chlorine is a harmful impurity element in the zinc hydrometallurgy process. Chlorine mainly comes from chlorides in zinc concentrate, zinc oxide ore or zinc fume. When Cl in the electrolytic circulating solution - When the ion concentration is greater than 100mg / L, the corrosion rate of the electrolytic cathode and anode plates will be accelerated, which will seriously affect the electrolytic efficiency of zinc electrowinning and the quality of electrolytic zinc products, increase energy consumption, increase production costs, and deteriorate the environment of the production workshop. In the production process of electrolytic manganese, the chlorine element in the whole electrolytic manganese circulating liquid exceeds the standard due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C25C1/10C25C1/16
Inventor 石爱华陈日颜文斌高峰
Owner JISHOU UNIVERSITY