Method for preparing nickel salt through direct leaching of nickel oxide at normal pressure

A nickel oxide, normal pressure technology, applied in the direction of nickel sulfate, nickel halide, etc., to achieve the effect of reducing costs, simplifying the production process, and reducing the introduction of impurities

Inactive Publication Date: 2018-04-20
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Effect test

Embodiment 1

[0020] Take 5g of nickel oxide and place it in a 250ml beaker, add 30ml of 1.84M sulfuric acid solution, stir and react for 1h at a temperature of 50°C, and gradually generate a large amount of yellow-green solid; add 5ml of concentrated sulfuric acid to continue the reaction for 1h; After completion, filter and wash the filter residue with distilled water to weak acidity, then heat and dissolve with 30ml of distilled water to form a clear nickel sulfate solution. The quality of the unreacted black solid raw material was 3.8g, and the nickel ion content in the solution was 30g / L.

Embodiment 2

[0022] Take 5g of nickel oxide and place it in a 250ml beaker, add 30ml of 5.5M sulfuric acid solution, stir and react for 1h at a reaction temperature of 100°C, and gradually generate a large amount of yellow-green solid; add 4ml of concentrated sulfuric acid to continue the reaction for 1h; After the reaction is completed, filter and wash the filter residue with distilled water to weak acidity, then heat and dissolve with 30ml of 2% hydrogen peroxide aqueous solution to form a clear solution. The quality of the unreacted black solid raw material was 1.7 g, and the nickel ion content in the solution was 80 g / L.

Embodiment 3

[0024] Take 5g of nickel oxide and put it in a 250ml beaker, add 30ml of 9.2M sulfuric acid solution. Under the condition that the reaction temperature was 80°C, the reaction was stirred for 1 h, and a large amount of yellow-green solid was gradually formed, and 3 ml of concentrated sulfuric acid was added to continue the reaction for 1 h. After the reaction was completed, there was basically no black solid raw material remaining, filtered, and the filter residue was washed with distilled water to weak acidity, and the solid residue was directly heated and dissolved with 30ml of 5% hydrogen peroxide aqueous solution to form a clear solution. The nickel ion content in the solution is 121g / L.

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Abstract

The invention discloses a method for preparing nickel sulfate or nickel chloride through normal-pressure leaching of a nickel oxide. The method comprises the following steps: mixing a dilute sulfuricacid solution with a nickel oxide, and carrying out a stirring reaction at 50 to 100 DEG C for 1 to 5 h so as to gradually produce a yellow-green solid; carrying out solid-liquid separation, washing the yellow-green solid with distilled water until the solid is weakly acid and then dissolving the solid with distilled water or with an aqueous hydrogen peroxide solution with a concentration of 1 to5% so as to produce a corresponding nickel sulfate solution; and mixing a hydrochloric acid solution with the nickel oxide and carrying out a stirring reaction at 50 to 100 DEG C for 1 to 3 h so as togradually produce a green nickel chloride solution. A nickel salt solution prepared by using the method has nickel content of 110 g/L or above. According to the method, direct leaching reaction at normal pressure is carried out so as to obtain nickel sulfate and nickel chloride, so production flow of nickel sulfate and nickel chloride is effectively simplified, and cost is lowered; and impurity introduction is reduced from the source, so the quality of nickel sulfate is effectively improved.

Description

technical field [0001] The invention relates to a method for preparing nickel salt, in particular to a method for directly preparing high-purity nickel sulfate or nickel chloride by using nickel oxide under normal pressure. Background technique [0002] Nickel salt is an important chemical raw material. For example, nickel sulfate (NiSO 4 ) As an important chemical raw material, it is widely used in electroplating, batteries, printing and dyeing, medicine, construction, national defense and other fields; nickel chloride (NiCl 2 ) Applied in nickel plating, making invisible potion and making ammonia absorbent, etc. The preparation methods of nickel sulfate and nickel chloride mainly include chemical method and electrochemical method. The traditional raw materials for the production of nickel sulfate and nickel chloride include electronic nickel, high nickel matte, nickel-containing waste materials and crude nickel hydroxide. Nickel oxides include nickelous oxide (NiO), ni...

Claims

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Application Information

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IPC IPC(8): C01G53/10C01G53/09
CPCC01G53/10C01G53/09
Inventor 郭勇卢晓锋李亦婧
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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