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Method for reducing dosage of extractant from source of acid extraction system and lowering content of organic matters in aqueous phase

An extraction agent, a technology in the water phase, applied in the field of acidic extraction system, can solve the problems that do not involve the angle of extraction agent emission reduction, reduce the content of organic matter in wastewater, and complicated purification treatment operations, achieve excellent extraction effect, reduce the content of organic matter, The effect of good economic benefits

Active Publication Date: 2019-03-22
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for the acidic extraction system, the prior art focuses on the concentration of metal ions obtained in the extract and the purification of the raffinate wastewater after extraction. Not only is the purification operation complicated, but the water phase in the extract contains too much oil. It will cause the amount of extraction agent to increase, thereby increasing the cost
It can be seen that none of the prior art involves reducing the content of organic matter in wastewater from the perspective of extractant emission reduction and from the source of the extraction system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A method for reducing the amount of extractant used from the source of an acidic extraction system and reducing the content of organic matter in the aqueous phase, the compound phase interface modifier used in the method contains the following components by volume fraction: 70% isooctanol, Cyclopentanone 20% and ethyl butyrate 10%.

[0056] The acidic extractant P204 added with the complex phase interface modifier and P204 without treatment were mixed with the solution to be treated in which 8.6g / L nickel was dissolved at 25°C at a volume ratio of 1:1 for 30 minutes, and then Stand still for 30 minutes to obtain extract and raffinate.

[0057] After testing, the P204 raffinate with the compound phase interface modifier contained 203mg / L of nickel and 332mg / L of COD, and the untreated P204 raffinate contained 201mg / L of nickel and 2463mg / L of COD .

Embodiment 2

[0059] A method for reducing the amount of extractant used from the source of an acidic extraction system and reducing the content of organic matter in the water phase, the compound phase interface modifier used in the method contains the following components by volume fraction: n-pentanol 80%, Heptanone 10% and Butyl Acetate 10%.

[0060] The acidic extractant P507 added with the composite phase interface modifier and the untreated P507 were mixed with the wastewater phase to be treated in which 8.6g / L cobalt was dissolved at a volume ratio of 1:1 at 35°C for 30 minutes. Stand still for 30 minutes to obtain the extract phase and the raffinate phase.

[0061] After testing, the P507 raffinate containing the compound phase interface modifier contains 320mg / L of cobalt, and the COD is 262mg / L, and the untreated P204 raffinate contains 316mg / L of cobalt, and the COD is 1526mg / L .

Embodiment 3

[0063] A method for reducing the amount of extractant used from the source of an acidic extraction system and reducing the content of organic matter in the water phase, the compound phase interface modifier used in the method contains the following components by volume fraction: 90% heptanol, cycloheptyl alcohol Pentanone 8% and Dimethyl Phthalate 2%.

[0064] The acidic extractant P204 added with the compound phase interface modifier and P204 without treatment were mixed with the wastewater to be treated in which 8.6g / L zinc was dissolved at 28°C at a volume ratio of 1:1 for 30 minutes, and then Stand still for 30 minutes to obtain the extract phase and the raffinate phase.

[0065] After testing, the P204 raffinate containing the compound phase interface modifier contains 167mg / L of zinc, and the COD is 312mg / L, and the P204 raffinate without treatment contains 165mg / L of zinc, and the COD is 2458mg / L .

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Abstract

The invention provides a method for reducing the dosage of an extractant from the source of an acid extraction system and lowering the content of organic matters in an aqueous phase. The method comprises the following steps: adding a complex phase interface modifier into an acid extraction system of a solution to be treated; standing for separation to obtain extraction liquid and raffinate, wherein the complex phase interface modifier is prepared from the following components in parts by volume: 70 to 100 parts of alcohol solvent, 0 to 20 parts of ketone solvent, and 0 to 10 parts of ester solvent. By adopting the method, the problem of severe influence on equipment and products since the concentration of organic matters in wastewater is too high due to the dissolution or drift loss of theextractant in the extraction process of the acid extraction system can be solved, the loss of the extractant in the wastewater is reduced directly by 70 percent or more, the source reduction rate ofthe extractant is improved greatly, the content of the organic matters in the aqueous phase is lowered greatly, secondary pollution is lowered, the load on extraction equipment is lowered, and the product quality is improved.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to a method for reducing the amount of extractant from the source of an acidic extraction system and reducing the content of organic matter in the water phase, in particular to an acidic extraction system for high-concentration organic waste water, which reduces the amount of extractant from the source And reduce the method of organic content in the water phase. Background technique [0002] In the field of hydrometallurgy, solvent extraction is widely used as an important separation method for extracting / separating metals. Solvent extraction method is divided into acidic extraction system, neutral extraction system, amine extraction system and chelation extraction system according to different extraction systems. The extraction agents used in acidic extraction system include organic phosphoric acid, carboxylic acid and some other organic acids, among which organic Phosphoric acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26B01D11/04
CPCB01D11/04B01D11/0492C02F1/26
Inventor 宁朋歌曹宏斌
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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