A method for solvent extraction and separation of nickel and cobalt under a supergravity field

A high-gravity field and extraction technology, applied in the field of hydrometallurgy, to achieve high mass transfer efficiency, save primary investment, and reduce the number of extraction stages

Inactive Publication Date: 2016-06-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant report on the successful use of high gravity technology for solvent extraction and separation of nickel and cobalt solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In the method of solvent extraction and separation of nickel and cobalt under a supergravity field, the cobalt-containing nickel solution is used as an aqueous phase, the extractant and a diluent constitute an organic phase, and the aqueous phase and the organic phase are extracted under a supergravity field to obtain a cobalt-loaded organic phase. and raffinate, the cobalt-loaded organic phase is added with a stripping agent under a supergravity field for stripping to obtain a cobalt-containing solution and an empty organic phase.

[0026] Among them, the cobalt-nickel solution is a sulfuric acid medium, and the main components are: Co 2+ 4.4g / L, Ni 2+ 78.5g / L, of which Co 2+ with you 2+ The mass ratio is 1:18.

[0027] Specific steps are as follows:

[0028] (1) First, the cobalt-nickel solution is made into an aqueous phase, and the extractant and diluent form an organic phase. The aqueous phase and the organic phase are extracted under a supergravity field to ob...

Embodiment 2

[0032] In the method of solvent extraction and separation of nickel and cobalt under a supergravity field, the cobalt-containing nickel solution is used as an aqueous phase, the extractant and a diluent constitute an organic phase, and the aqueous phase and the organic phase are extracted under a supergravity field to obtain a cobalt-loaded organic phase. and raffinate, the cobalt-loaded organic phase is added with a stripping agent under a supergravity field for stripping to obtain a cobalt-containing solution and an empty organic phase.

[0033] Among them, the cobalt-containing nickel solution is a sulfuric acid medium system, and its components are: containing Co 2+ 4.4g / L, Ni 2+ 78.5g / L, of which Co 2+ with you 2+ The mass ratio is 1:18.

[0034] Specific steps are as follows:

[0035] (1) First, the cobalt-nickel solution is made into an aqueous phase, and the extractant and diluent form an organic phase. The aqueous phase and the organic phase are extracted under a ...

Embodiment 3

[0039] In the method of solvent extraction and separation of nickel and cobalt under a supergravity field, the cobalt-containing nickel solution is used as an aqueous phase, the extractant and a diluent constitute an organic phase, and the aqueous phase and the organic phase are extracted under a supergravity field to obtain a cobalt-loaded organic phase. and raffinate, the cobalt-loaded organic phase is added with a stripping agent under a supergravity field for stripping to obtain a cobalt-containing solution and an empty organic phase.

[0040] The cobalt-containing nickel solution is a hydrochloric acid medium system, and the component is Co 2+ 0.9g / L, Ni 2+ 11g / L, where Co 2+ with you 2+ The mass ratio is 1:12.

[0041] Specific steps are as follows:

[0042] (1) First, the cobalt-nickel solution is made into an aqueous phase, and the extractant and diluent form an organic phase. The aqueous phase and the organic phase are extracted under a supergravity field to obtai...

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Abstract

The invention relates to a method for separating nickel and cobalt by solvent extraction under a super-gravity field and belongs to the technical field of hydrometallurgy under a special field condition. The method for separating nickel and cobalt by solvent extraction under the super-gravity field comprises the following steps: by using a nickel and cobalt containing solution as a water phase as well as an organic phase formed by an extraction agent and a diluent, extracting the water phase and the organic phase under the super-gravity field to obtain a cobalt-loading organic phase and raffinate; and adding a reverse extraction agent into the cobalt-loading organic phase under the super-gravity field for reverse extraction for obtaining a cobalt-containing solution and a no-load organic phase. According to the method provided by the invention, the mass transfer process of nickel and cobalt extraction is intensified, the selectivity of cobalt extraction is improved and co-extraction of nickel is reduced by adjusting the super-gravity factors and the flow ratio, so that the purpose of improving the cobalt and nickel separating coefficient is achieved.

Description

technical field [0001] The invention relates to a method for solvent extraction and separation of nickel and cobalt under a supergravity field, and belongs to the technical field of hydrometallurgy under special field conditions. Background technique [0002] Nickel-cobalt is an important non-ferrous strategic metal. It is located adjacent to each other in the periodic table of chemical elements. It belongs to the same kind of elements and has similar chemical properties. It is often symbiotic and associated in ore deposits. Nickel-cobalt separation methods mainly include chemical precipitation and extraction separation. The chemical precipitation method has low selectivity for separating nickel and cobalt, and has the disadvantage of low purity of nickel and cobalt products, which limits its application range. Therefore, solvent extraction is mostly used to separate and recover nickel and cobalt. [0003] At present, the main equipment of the nickel-cobalt separation and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/26C22B23/00
CPCY02P10/20
Inventor 常军彭金辉张利波叶乾旭陈景
Owner KUNMING UNIV OF SCI & TECH
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