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Method for preparing 5N cobalt chloride through P507 fractional extraction

A cobalt chloride and extraction technology, which is applied in the field of directly preparing 5N-level cobalt chloride, can solve the problems of small processing capacity, the 5N-level cobalt chloride solvent extraction method has not been established, and the purification cost is high, and the production cost is reduced, which is beneficial to large Large-scale industrial production and good working environment

Inactive Publication Date: 2017-10-24
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the solvent extraction method, the ion exchange method has the disadvantages of small processing capacity and high purification cost.
[0008] A solvent extraction method for preparing 5N grade cobalt chloride directly from industrial cobalt chloride solution has not yet been established

Method used

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  • Method for preparing 5N cobalt chloride through P507 fractional extraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Separation of NiMgCo / CoCaCuZn by fractional distillation and extraction

[0026]The organic phase of sodium saponification P507 is the sulfonated kerosene solution of extraction agent P507, the concentration of extraction agent P507 is 1.0mol / L; sodium saponification must be carried out during use, and the saponification rate is 36%. The high-cobalt and low-nickel industrial hydrochloride solution is an aqueous solution containing cobalt chloride as the feed liquid, and its composition is: Co 70.0g / L, Ni 2.0g / L, Mg 5.0g / L, Ca 2.0g / L, Cu 1.5 g / L, Zn 1.5g / L, pH=4. The washing acid is 3.0mol / L HCl.

[0027] The organic phase of sodium saponification P507 enters the NiMgCo / CoCaCuZn fractionation extraction system from the first stage, the high-cobalt and low-nickel industrial hydrochloride solution enters the NiMgCo / CoCaCuZn fractionation extraction system from the 17th stage, and the 3.0mol / L HCl washing acid enters from the 28th stage NiMgCo / CoCaCuZn Fractional Extra...

Embodiment 2

[0036] 1) Separation of NiMgCo / CoCaCuZn by fractional distillation and extraction

[0037] The organic phase of sodium saponification P507 is sulfonated kerosene solution of extraction agent P507, the concentration of extraction agent P507 is 1.5mol / L; sodium saponification must be carried out during use, and the saponification rate is 30%. High-cobalt and low-nickel industrial hydrochloride solution is an aqueous solution containing cobalt chloride as the feed liquid, and its composition is: Co 90.0g / L, Ni 3.0g / L, Mg 8.0g / L, Ca 3.0g / L, Cu 2.0 g / L, Zn 2.0 g / L, pH=3. The washing acid is 3.0mol / L HCl.

[0038] The organic phase of sodium saponification P507 enters the NiMgCo / CoCaCuZn fractionation extraction system from the first stage, the high-cobalt and low-nickel industrial hydrochloride solution enters the NiMgCo / CoCaCuZn fractionation extraction system from the 17th stage, and the 3.0mol / L HCl washing acid enters from the 28th stage NiMgCo / CoCaCuZn Fractional Extraction ...

Embodiment 3

[0047] 1) Separation of NiMgCo / CoCaCuZn by fractional distillation and extraction

[0048] The organic phase of sodium saponification P507 is sulfonated kerosene solution of extraction agent P507, the concentration of extraction agent P507 is 0.5mol / L; sodium saponification must be carried out during use, and the saponification rate is 40%. The high-cobalt and low-nickel industrial hydrochloride solution is an aqueous solution containing cobalt chloride as the feed liquid, and its composition is: Co 50.0g / L, Ni 1.0g / L, Mg 2.0g / L, Ca 1.0g / L, Cu 1.0 g / L, Zn 1.0 g / L, pH=5. The washing acid is 3.0mol / L HCl.

[0049] The organic phase of sodium saponification P507 enters the NiMgCo / CoCaCuZn fractionation extraction system from the first stage, the high-cobalt and low-nickel industrial hydrochloride solution enters the NiMgCo / CoCaCuZn fractionation extraction system from the 16th stage, and the 3.0mol / L HCl washing acid enters from the 27th stage NiMgCo / CoCaCuZn Fractional Extract...

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Abstract

The invention discloses a method for preparing 5N cobalt chloride through P507 fractional extraction and belongs to the technical field of preparation of high-purity cobalt chloride. According to the method, the 5N cobalt chloride is composed of fractional extraction separated NiMgCo / CoCaCuZn, fractional extraction separated NiMg / Co and fractional extraction separated Co / CaCuZn with a high-cobalt low-nickel industrial hydrochloride solution as feed liquid and 2-ethylhexylphosphoric acid mono-2-ethylhexyl ester (P507 for short) as an extraction agent. The fractional extraction separated NiMg / Co and the fractional extraction separated Co / CaCuZn are connected in series. Organic phases of outlet organic phase supported cobalt of the fractional extraction separated NiMg / Co serve as extraction organic phases of the fractional extraction separated Co / CaCuZn. Outlet aqueous phase 5N cobalt chloride of the fractional extraction separated Co / CaCuZn serves as a washing agent of the fractional extraction separated NiMg / Co. Separation of metallic elements such as nickel, cobalt, magnesium, calcium and sodium is realized smoothly. The 5N cobalt chloride is prepared directly. The yield of cobalt reaches up to 95%-97%. The method has the advantages that the purity of separated cobalt chloride products is high; the yield of cobalt is high; consumption of the reagent is little; the technological process is short; and the production cost is low.

Description

technical field [0001] The invention relates to a method for preparing 5N-grade cobalt chloride by fractional distillation and extraction of P507, in particular to using high-cobalt and low-nickel industrial hydrochloride solution as a feed liquid, P507 as an extraction agent, and fractional distillation and extraction to realize cobalt and nickel, magnesium, calcium and copper Separation of metal elements such as , zinc, and direct preparation of 5N-grade cobalt chloride. The invention belongs to the technical field of preparing high-purity cobalt chloride. Background technique [0002] 5N grade cobalt has important uses in high-performance electronic components and other fields. 5N grade cobalt chloride is the basic chemical substance for preparing high-purity cobalt materials. [0003] In 2006, Luo Suibin (Rare Metal Letters, 2006, Volume 25, No. 12, Pages 8-13) and others thought: "The reasonable process for preparing high-purity cobalt above 5N is: firstly, use ion ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/38C22B23/00
CPCC22B3/3846Y02P10/20
Inventor 钟学明
Owner NANCHANG HANGKONG UNIVERSITY
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