Method for preparing 6N-grade nickel sulfate by fractionally extracting P229 (bis(2-ethylhexyl)phosphonic acid)

A nickel sulfate extraction technology, which is applied in the preparation of nickel sulfate and nickel compounds, etc., to achieve the effects of short process flow, good working environment and easy operation

Inactive Publication Date: 2017-09-22
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that there is no method for preparing 6N grade nickel sulfate from 2N~3N industrial grade nickel sulfate at present.

Method used

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  • Method for preparing 6N-grade nickel sulfate by fractionally extracting P229 (bis(2-ethylhexyl)phosphonic acid)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Separation of NaNi / NiMgCaCoMnCu by fractional distillation

[0026] The organic phase of nickel-sodium saponification P229 is the sulfonated kerosene solution of extractant P229, and the concentration of extractant P229 is 1.0mol / L; when used, the first-stage outlet water phase of the NaNi / NiMgCaCoMnCu fractional distillation extraction system is used to obtain NiSO 4 and Na 2 SO 4 The aqueous solution of the mixture was saponified with nickel and sodium, and the saponification rate was 36%. 2N~3N industrial grade nickel sulfate aqueous solution is the aqueous solution containing nickel sulfate as the feed liquid, and its composition is: Ni110g / L, Na0.005g / L, Mg0.15g / L, Ca0.10g / L, Co0.03g / L, Mn0.02g / L, Cu0.01g / L, pH=4.0. Washing acid is 1.5mol / LH 2 SO 4 .

[0027] The organic phase of nickel sodium saponification P229 enters the NaNi / NiMgCaCoMnCu fractionation extraction system from the first stage, and the 2N~3N industrial grade nickel sulfate aqueous solution...

Embodiment 2

[0036] 1) Separation of NaNi / NiMgCaCoMnCu by fractional distillation

[0037] The organic phase of nickel-sodium saponification P229 is the sulfonated kerosene solution of extractant P229, the concentration of extractant P229 is 1.5mol / L; the first-stage outlet water phase of NaNi / NiMgCaCoMnCu fractional distillation extraction system is used to obtain NiSO 4 and Na 2 SO 4 The aqueous solution of the mixture was saponified with nickel and sodium, and the saponification rate was 30%. 2N~3N industrial grade nickel sulfate aqueous solution is the aqueous solution containing nickel sulfate as the feed liquid, and its composition is: Ni120g / L, Na0.01g / L, Mg0.25g / L, Ca0.15g / L, Co0.06g / L, Mn0.05g / L, Cu0.02g / L, pH=3.0. Washing acid is 1.5mol / LH 2 SO 4 .

[0038] The organic phase of sodium nickel saponification P229 enters the NaNi / NiMgCaCoMnCu fractionation extraction system from the first stage, and the 2N~3N industrial grade nickel sulfate aqueous solution enters the NaNi / NiM...

Embodiment 3

[0047] 1) Separation of NaNi / NiMgCaCoMnCu by fractional distillation

[0048] The organic phase of nickel-sodium saponification P229 is the sulfonated kerosene solution of extractant P229, the concentration of extractant P229 is 0.5mol / L; when used, the first-stage outlet water phase of the NaNi / NiMgCaCoMnCu fractional distillation extraction system is used to obtain NiSO 4 and Na 2 SO 4 The aqueous solution of the mixture was saponified with nickel and sodium, and the saponification rate was 40%. 2N~3N industrial grade nickel sulfate aqueous solution is the aqueous solution containing nickel sulfate as the feed liquid, and its composition is: Ni100g / L, Na0.001g / L, Mg0.025g / L, Ca0.015g / L, Co0.006g / L, Mn0.005g / L, Cu0.002g / L, pH=4.5. Washing acid is 1.5mol / LH 2 SO 4 .

[0049] The organic phase of sodium nickel saponification P229 enters the NaNi / NiMgCaCoMnCu fractionation extraction system from the first stage, and the 2N~3N industrial grade nickel sulfate aqueous solutio...

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Abstract

The invention discloses a method for preparing 6N-grade nickel sulfate by fractionally extracting P229 (bis(2-ethylhexyl)phosphonic acid), and belongs to the technical field of preparing high-purity nickel sulfate. 2N to 3N industrial-grade nickel sulfate is used as feed liquid, and bis(2-ethylhexyl)phosphonic acid (P229 for short) is used as an extraction agent. The method comprises the following steps: a NaNi/NiMgCaCoMnCu fractional extraction and a separation step, a Na/Ni fractional extraction and separation step and a Ni/MgCaCoMnCu fractional extraction and separation step, wherein the Na/Ni fractional extraction and separation step and the Ni/MgCaCoMnCu fractional extraction and separation step are connected in series; separation of Ni from metal elements of Cu, Mn, Co, Ca, Na and the like is successfully realized, and the 6N-grade nickel sulfate is directly prepared; the yield of the Ni is up to 94 to 96 percent. The method disclosed by the invention has the advantages of high purity of a separation product-nickel sulfate, high yield of valuable metal elements, less reagent consumption, short technological process, low production cost and the like.

Description

technical field [0001] The invention relates to a method for preparing 6N-grade nickel sulfate by fractional distillation and extraction of P229, in particular to using 2N to 3N industrial-grade nickel sulfate aqueous solution as the feed liquid, P229 as the extraction agent, fractional distillation and extraction to realize nickel and copper, manganese, cobalt, calcium and magnesium Separation of metal elements such as , sodium, and direct preparation of 6N grade nickel sulfate. The invention belongs to the technical field of preparing high-purity nickel sulfate. Background technique [0002] With the development of science and technology, the demand for high-purity nickel products is increasing. 6N (99.9999%) grade nickel sulfate is not only an important high-purity nickel product, but also one of the basic raw materials for preparing other high-purity nickel products. [0003] In 2009, the Chinese patent application number 200910096246.2 proposed the use of: 1) hydrogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/10
CPCC01G53/003C01G53/10C01P2006/80
Inventor 钟学明
Owner NANCHANG HANGKONG UNIVERSITY
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