A method for eliminating silicon dioxide emulsions of organic extractants

A technology of organic extractant and silica, which is applied in the field of silica emulsion to eliminate organic extractant, can solve the problems of long processing time, high processing cost, incomplete recovery of organic phase, etc., and achieve low cost of environmental protection treatment Effect

Active Publication Date: 2019-11-05
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 component, the test data is reported as silicon dioxide 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 put 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 irradiating the microwave, then let it stand for 10 minutes to separate the phases, and 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 tota...

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, put it in a microwave oven with a magnetic stirring device, adjust the radiation frequency of the microwave oven to 50-100GHz, the power of 500W, the stirring speed of 100r / min, microwave radiation for 20 minutes, and stand for 15 minutes to separate the phases to obtain the P204 organic phase 175ml, 280ml of the extracted water phase, and 45ml of the remaining emulsified phase. In addition to the silicon dioxide emulsion, a black dust emulsified layer can also be seen in the emulsified layer. 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 for 20 minutes while stirring at a speed of 150r / min, 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

A method for eliminating the silicon dioxide emulsion of an organic extractant. The organic extractant silicon dioxide emulsion is irradiated with microwaves, stirred and irradiated for a certain period of time, and then left to separate phases to obtain a separated and clarified loaded organic phase and a The water phase of the silica flocculent precipitate is loaded with the organic phase and returned for use; the microwave radiation frequency used is 2-100GHz, the power is 100-500W, and the radiation is irradiated while stirring, and the time is 10-30 min; the phase separation time is allowed to stand For 10-20 min, or after more than 80% of the silica emulsion is eliminated, the organic phase and the water phase are separated, and the emulsion in the remaining organic phase is returned to microwave treatment. The present invention uses microwave radiation energy to penetrate organic phases with high dielectric constants such as kerosene without loss, and is easily and better absorbed by silicon dioxide hydrated emulsions, resulting in instantaneous high-temperature dehydration to treat and eliminate the oxidation of organic extractants. Silicon emulsion is characterized by short time, high efficiency, low cost, and no waste residue and waste water.

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 Patents(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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