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Nickel fluoride preparation method

A technology of nickel fluoride and ammonium fluoride, applied in the direction of nickel halide, etc., which can solve the problems of strong fluorine gas, toxicity, and high equipment requirements

Active Publication Date: 2015-02-04
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fire method uses fluorine gas to calcinate with nickel oxide under the condition of isolating the air environment, and directly synthesizes nickel fluoride solid. This method requires high equipment, and fluorine gas has strong toxicity.

Method used

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preparation example Construction

[0016] A kind of preparation method of nickel fluoride, its process is successively:

[0017] a. Slurry of nickel carbonate

[0018] Slurry the nickel carbonate with pure water according to the liquid-solid ratio of 3:1-4:1;

[0019] b. Synthetic preparation

[0020] Raise the temperature of the slurried nickel carbonate to 75°C-90°C, add ammonium fluoride according to 1.25-1.4 times the mass of nickel carbonate to ensure excess ammonium fluoride, keep the temperature at 75°C-90°C, and react under stirring conditions for 2 -3 hours, ammonia gas is produced during the reaction;

[0021] c. Purify and remove impurities

[0022] A large amount of ammonia gas will be produced during the reaction process, but due to the high solubility of ammonia gas, there is not much ammonia gas volatilized. This part of ammonia gas dissolved in the solution will form nickel ammonia complexes with nickel ions, resulting in the formation of nickel fluoride Redissolution, so after the reaction ...

Embodiment 1

[0026] a. Slurry of nickel carbonate

[0027] The nickel carbonate is slurried according to the liquid-solid ratio of nickel carbonate to pure water of 3:1, and then the temperature is raised to 75°C.

[0028] b. Synthetic preparation

[0029] Add ammonium fluoride to the slurry formed in step a for synthetic preparation, the amount of ammonium fluoride added is 1.25 times the mass of nickel carbonate, keep the temperature at 75°C, and react for 2 hours under stirring conditions, during the reaction process Ammonia gas is produced.

[0030] c. Purify and remove impurities

[0031] Add anhydrous sodium carbonate to the substance formed in step b, the specific amount added is 0.3 times the amount of the nickel carbonate substance, keep the temperature at 75°C, and react for 2 hours.

[0032] d. Washing, filtering and drying

[0033] After the reaction, according to the liquid-solid ratio of 3:1, the filter cake was washed twice with pure water, and then the filter cake was d...

Embodiment 2

[0037] a. Slurry of nickel carbonate

[0038] The nickel carbonate is slurried according to the liquid-solid ratio of nickel carbonate to pure water of 4:1, and then the temperature is raised to 80°C.

[0039] b. Synthetic preparation

[0040] Add ammonium fluoride to the slurry formed in step a for synthetic preparation, the amount of ammonium fluoride added is 1.3 times the mass of nickel carbonate, keep the temperature at 80°C, and react for 2 hours under stirring conditions, during the reaction process Ammonia gas is produced.

[0041] c. Purify and remove impurities

[0042] Add potassium carbonate to the substance formed in step b, the specific amount added is 0.3 times the amount of nickel carbonate substance, keep the temperature at 80°C, and react for 1.5 hours.

[0043] d. Washing, filtering and drying

[0044] After the reaction, according to the liquid-solid ratio of 2:1, the filter cake was washed twice with pure water, and then the filter cake was dried until...

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Abstract

The invention relates to a nickel fluoride preparation method, and relates to a hydrometallurgy nickel fluoride preparation method, and the method is characterized in that: in the preparation process, nickel fluoride is prepared from nickel carbonate and ammonium fluoride as raw materials by four steps of nickel carbonate slurrying, synthesis preparation, purification and impurity removal, and filtering and washing and drying. The specific method is as follows: the nickel fluoride is prepared from the nickel carbonate and the ammonium fluoride as the raw materials by four steps of nickel carbonate slurrying, synthesis preparation, purification and impurity removal, and filtering and washing and drying, in the preparation process, an auxiliary material is a soluble carbonate, no fluorine gas, hydrofluoric acid and other strong corrosive materials is used, and compared with the traditional process, the method has high safety, low equipment requirement, simple operation, high product quality and other advantages.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgical production of nickel fluoride, and in particular relates to a preparation method of nickel fluoride. Background technique [0002] At present, the common nickel fluoride synthesis process is divided into wet method and fire method. The wet method is mainly prepared by the reaction of hydrofluoric acid with nickel carbonate or nickel hydroxide. The hydrofluoric acid used in the reaction process is very corrosive. , and the hydrogen fluoride gas volatilized at the same time has certain toxicity, which is very harmful to personnel and equipment. The fire method uses fluorine gas to calcinate with nickel oxide under the condition of isolating the air environment, and directly synthesizes nickel fluoride solid. This method requires high equipment, and fluorine gas has strong toxicity. In order to reduce the toxicity and equipment requirements of the synthesis process, nickel fluoride was sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/08
Inventor 王永铸李宝平邢晓钟任伟陈胜维谭卫民于红孙正德
Owner JINCHUAN GROUP LIMITED
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