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Method for back extraction of amine molybdenum-containing organic phase

An organic phase and stripping agent technology, which is applied in the field of amine molybdenum-containing organic reverse extraction to achieve the effects of strong practicability, simple process and improved operability

Inactive Publication Date: 2018-12-18
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing interface fouling reduction or elimination technologies are effective for specific systems
However, there is no way to reduce the interface dirt generated in the process of organic reverse extraction of molybdenum-containing amines. Therefore, a method for organic reverse extraction of molybdenum-containing amines has been invented.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] In the molybdenum-containing organic phase of an amine, the amine concentration is 1%, and the molybdenum concentration is 1g / L.

[0032] With 5% ammonia water as stripping agent, the addition of hydrogen peroxide is 1% of the addition of ammonia water.

[0033] The stripping flow ratio was controlled to be 50:1, the mixing contact ratio was 4:1, the mixing time was 1 min, and the stripping temperature was 10°C.

[0034] The concentration of molybdenum in the poor organic phase obtained by stripping is 0.04g / L, and the concentration of molybdenum in the backextraction solution is 102g / L, and the generation of interface dirt is reduced by 55.3%.

example 2

[0036] In the molybdenum-containing organic phase of certain amines, the amine concentration is 5%, and the molybdenum concentration is 7g / L.

[0037] With 15% ammonia water as stripping agent, the addition of hydrogen peroxide is 2% of the amount of ammonia addition.

[0038] The stripping flow ratio was controlled to be 15:1, the mixing contact ratio was 1:1, the mixing time was 6min, and the stripping temperature was 25°C.

[0039] The concentration of molybdenum in the poor organic phase obtained by stripping was 0.06g / L, and the concentration of molybdenum in the backextraction solution was 106g / L, and the generation of interface dirt was reduced by 57.2%.

example 3

[0041] In the molybdenum-containing organic phase of certain amines, the amine concentration is 7.5%, and the molybdenum concentration is 11g / L.

[0042] With 16% ammoniacal liquor as stripping agent, the addition of hydrogen peroxide is 4% of the ammoniacal liquor addition.

[0043] The stripping flow ratio was controlled to be 10:1, the mixing contact ratio was 1:2, the mixing time was 5 min, and the stripping temperature was 20°C.

[0044] The concentration of molybdenum in the poor organic phase obtained by stripping is 0.05g / L, the concentration of molybdenum in the backextraction solution is 110g / L, and the generation of interface dirt is reduced by 56.5%.

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Abstract

The invention relates to a method for back extraction of amine molybdenum-containing organic phase. The method adopts single stage back extraction or multi-stage back current back extraction, the amine molybdenum-containing organic phase comprises the following components by concentration: 1-20% of amine, 1-30 g / L of molybdenum, and the balance a phase improver and a diluent. The method comprisesthe following steps that 1, a back extraction agent is prepared, the back extraction agent is mixed solution of ammonia and hydrogen peroxide, the ammonia concentration range is 5-28%, the hydrogen peroxide addition is 1-15% of the ammonia addition, and the concentration range of the hydrogen peroxide is 10-50%; 2, the back extraction agent prepared by the step one and the amine containing-molybdenum organic phase are subjected to mixing and back extraction, the flow ratio of the organic phase to a water phase is 2:1-50:1, the back extraction time is 1-10 min, the back extraction temperature is 10-40 DEG C, and the contact phase ratio between the organic phase and the water phase is 4:1-1:4; and 3, and the mixed phase obtained in the step two is separated to obtain the containing-molybdenum back extraction fluid and a stripped organic phase. By means of the method, the interfacial dirt produced in the back extraction process of the amine containing-molybdenum organic phase can be reduced by more than 50%.

Description

technical field [0001] The invention relates to the field of extracting molybdenum by a solvent extraction method in hydrometallurgy, in particular to an organic reverse extraction method for amines containing molybdenum. Background technique [0002] The current amine extraction method for preparing ammonium molybdate uses ammonia water as the stripping agent, and countercurrent stripping is used to obtain the stripping solution and the organic-poor phase. After the stripping liquid is purified and removed, and the sulfuric acid is neutralized to a pH of about 2, ammonium molybdate crystals are precipitated, and the crystals are ammonium molybdate products. [0003] There are some problems in the current molybdenum stripping process, some of which have been mentioned and solved in the patent "A stripping method of molybdenum-containing organic phase" (CN106591603A), and there are still some problems in the actual stripping operation process. The problem of interface dirt. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/34C22B3/28
CPCC22B34/34C22B3/28Y02P10/20
Inventor 支梅峰周志全赵凤岐舒祖骏张永明曹令华王皓
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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