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Method for eliminating silicon dioxide emulsion of organic extracting agent

An organic extractant and silicon dioxide technology, which is applied in the field of silica emulsions for eliminating organic extractants, can solve the problems of long processing time, high consumption of sodium hydroxide or hydrofluoric acid, and high processing costs, and achieves environmental protection. The effect of low cost of governance

Active Publication Date: 2018-09-04
六盘水中联工贸实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Obviously, the current treatment method takes a long time, consumes a lot of sodium hydroxide or hydrofluoric acid, has a large amount of waste residue and waste water, does not completely recover the organic phase, and has high treatment costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An enterprise’s N235 kerosene system is used as the organic phase for extracting germanium from zinc sulfate acidic leaching solution. Since the leaching solution contains silicon dioxide (actually silicic acid, the test data is reported as silica data) 150-300mg / L . After one month of continuous extraction production, the third phase of the emulsion with a thickness of 10-20 mm was enriched at the interface between the organic phase and the aqueous phase in each extraction tank. After separation, take it out and place it in a microwave oven, adjust the power of the microwave oven to 250W, and the microwave radiation frequency to 25GHz, stir for 15 minutes while radiating microwaves, and then stand still for 10 minutes to separate the phases. Observe with the eyes, the emulsion is reduced by about 85%, and the clear phase of the organic phase is 3.5 / 10 of the total volume, there are flocs floating in the water phase, its volume is 5 / 10 of the total volume, and the uneli...

Embodiment 2

[0024] When a company used P204 to extract indium from indium-containing sulfuric acid solution, the solution contained 300-450 mg / L of silicon dioxide, resulting in the third phase of P204 silicon dioxide emulsion. Take out 500ml of the emulsified phase, place it in a microwave oven with a magnetic stirring device, adjust the radiation frequency of the microwave oven to 50-100GHz, power 500W, stirring speed 100r / min, microwave radiation for 20 minutes, and stand for 15 minutes to separate the phases to obtain the P204 organic phase 175ml, extracted water phase 280ml, remaining emulsified phase 45ml, black dust emulsified layer can also be seen in the emulsified layer except silicon dioxide emulsified matter. The aqueous phase was filtered to obtain 150 mg of silica precipitate.

Embodiment 3

[0026] Isolate 5000ml of silica emulsion from the Cp180 copper extraction process, put it in a microwave oven, adjust the frequency to 30-50GHz, power 450W, irradiate at 150r / min while stirring for 20 minutes, let stand for 20 minutes to separate phases, and obtain Cp180 Kerosene organic phase 1800ml, clarified water phase 2700ml, emulsified intermediate phase (third phase, including emulsions produced by other pollutants) 350ml, measured standing temperature after radiation was 85°C, kerosene loss and water phase evaporation loss 150ml.

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Abstract

The invention relates to a method for eliminating silicon dioxide emulsion of an organic extracting agent. The method comprises the following steps: performing the microwave radiation for an organic extracting agent silicon dioxide emulsion, stirring while performing radiation for a given time, standing, performing the phase splitting, obtaining a loading organic phase and a water phase containingsilicon dioxide flocculent precipitates which are separated and clarified, and reusing the loading organic phase, wherein the microwave radiation frequency is 2 to 100 GHz, the power is 100 to 500 W,and the stirring and radiating time is 10 to 30 minutes; and the standing and phase-splitting time is 10 to 20 minutes, or the organic phase and the water phase are separated after 80 percent of silicon dioxide emulsion or more is eliminated, and the emulsion in the residual organic phase is returned to be treated by virtue of microwave. The silicon dioxide emulsion of the organic extracting agent is eliminated by utilizing the characteristic that the microwave radiation can losslessly penetrate through the organic phase with high dielectric constant such as kerosene and can be easily absorbed by the silicon dioxide hydrate emulsion to lead to the instantaneous high-temperature dehydration. The method has the characteristics of short time, high efficiency, low cost, no waste, and no wastewater.

Description

technical field [0001] The present invention belongs to the technical field of hydrometallurgy, and in particular relates to the organic emulsion produced by organic extractants contaminated by silicic acid molecular groups (also known as silicon dioxide hydrated molecular groups) in the water phase during the extraction process (customarily called two Silicon oxide emulsion) is separated out or still exists between the organic phase and the water phase to form the third phase of the organic emulsion, using microwave radiation treatment to eliminate the emulsion, and the technology of separating and recovering the organic phase. Background technique [0002] When the silicon-containing material is leached out of valuable components with acid, a considerable part of the silicon dioxide in it will be leached into the leach solution, and the SiO 3 2- or SiO 4 3- Polymer groups exist, and no matter whether animal glue or polyether is used for removal, it is impossible to remo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26
CPCC22B3/26Y02P10/20
Inventor 刘安荣王振杰刘洪波钟先杰钟波李世平
Owner 六盘水中联工贸实业有限公司
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