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Method of preparing nickel nitrate by taking rough nickel hydroxide produced by laterite-nickel ore as raw material

A technology of nickel hydroxide and nickel nitrate, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc.

Active Publication Date: 2014-07-30
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of chemical reaction, although the crude nickel hydroxide produced by laterite nickel ore and nitric acid undergo a direct neutralization reaction to produce nickel nitrate solution, the nickel content of nickel hydroxide produced by laterite nickel ore only accounts for 40%. -50%, cobalt, calcium, magnesium, and manganese content accounted for 10%-20% in total, resulting in high impurity content in the nickel nitrate solution generated after nitric acid dissolution. Extraction solution for producing qualified nickel nitrate products

Method used

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  • Method of preparing nickel nitrate by taking rough nickel hydroxide produced by laterite-nickel ore as raw material
  • Method of preparing nickel nitrate by taking rough nickel hydroxide produced by laterite-nickel ore as raw material

Examples

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Embodiment 1

[0031] A method for preparing nickel nitrate from the thick nickel hydroxide produced by laterite nickel ore, comprising the following steps:

[0032] a. Preparation of Nickel Chloride Solution

[0033] The crude nickel hydroxide produced from laterite nickel ore is dissolved and leached by industrial grade hydrochloric acid (mass concentration 35%), and the added amount of hydrochloric acid is controlled so that the pH value of the leached solution is 3.5, and then the leached solution is press-filtered to obtain nickel chloride For the leach solution, barium chloride is added to the leach solution to remove sulfate radicals, and then filtered twice and then sent to P507 nickel soap for extraction and impurity removal to produce a nickel chloride solution with low impurity content;

[0034] The specific extraction process is: after mixing the P507 extractant and sulfonated kerosene at a ratio of 1:3, adding a NaOH solution with a mass concentration of 30% for saponification,...

Embodiment 2

[0041] Embodiment 2 step process is the same as embodiment 1, specifically:

[0042] The difference between step a and Example 1 is that the solution pH value after the control leaching is 3.8; in the extraction process, adding Ni ion concentration to the organic after saponification is that the nickel chloride solution of 80g / L produces nickel soap, The organic after nickel soap is mixed with the nickel chloride pre-extraction solution after removing sulfate radicals for extraction, and the loaded organic after extraction is extracted and regenerated with 5mol / L hydrochloric acid, and then re-saponified for reuse.

[0043] The difference between step b and Example 1 is that the concentration of the raw material nickel chloride solution is controlled at a nickel content of 45g / l, and the concentration of the sodium carbonate solution is controlled at a solute content of 150g / l; when the pH of the reaction solution reaches 8.3, stop adding Sodium carbonate solution, filter the ...

Embodiment 3

[0047] Embodiment 3 step process is the same as embodiment 1, specifically:

[0048] The difference between step a and Example 1 is that the solution pH value after the control leaching is 4.0; in the extraction process, adding Ni ion concentration to the organic after saponification is that the nickel chloride solution of 100g / L produces nickel soap, The organic after nickel soap is mixed with the nickel chloride pre-extraction solution after removing sulfate radicals for extraction, and the loaded organic after extraction is extracted and regenerated with 5.2mol / L hydrochloric acid, and then re-saponified for reuse.

[0049] The difference between step b and Example 1 is that the concentration of the raw material nickel chloride solution is controlled at a nickel content of 50g / l, and the concentration of the sodium carbonate solution is controlled at a solute content of 140g / l; when the pH of the reaction solution reaches 8.5, stop Add sodium carbonate solution, filter the ...

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Abstract

The invention provides a method of preparing nickel nitrate by taking rough nickel hydroxide produced by laterite-nickel ore as a raw material. The method mainly comprises the following steps: a, preparing nickel chloride liquor: dissolving and leaching rough nickel hydroxide produced by laterite-nickel ore by use of industrial-grade hydrochloric acid; b, preparing nickel carbonate: slowly adding sodium carbonate liquor and stirring at a constant speed after heating the nickel chloride liquor to over 80 DEG C, and filtering after reacting the liquor for 2-3 hours, so as to obtain a refined nickel carbonate product; c, preparing nickel nitrate, namely adding the nickel carbonate after diluting nitric acid in a ratio of 1:1, carrying out fine filtration after reacting for 2 hours, heating the filtrate for evaporating, cooling and crystallizing evaporated nickel nitrate liquor, filtering, crystallizing and centrifuging the obtained nickel nitrate, and drying to obtain the nickel nitrate product.

Description

technical field [0001] The invention discloses a method for preparing nickel nitrate by using crude nickel hydroxide produced from laterite nickel ore as a raw material, and relates to a method for producing nickel nitrate by hydrometallurgy. Background technique [0002] In the production of nickel nitrate products, the nickel nitrate solution is generally produced first, then the nickel nitrate solution is evaporated and crystallized, and finally the nickel nitrate product is obtained. And the method for producing nickel nitrate solution is more, can be by the method for dissolving electrolytic nickel by nitric acid, also can be produced by the method for dissolving nickel carbonate, nickel hydroxide by nitric acid, the adopting of various production methods is mainly based on the physical and chemical properties of raw materials used. Decide. The nickel hydroxide raw material produced by ammonia leaching of laterite nickel ore has gradually become the main raw material f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00
Inventor 杨志强李保平邢晓钟陈胜维任伟时金秋王永铸谭卫民张国勇曹增成张兵
Owner JINCHUAN GROUP LIMITED