Novel method for recycling polyethylene glycol and silicon carbide in silicon wafer cutting waste mortar
A technology of silicon wafer cutting and polyethylene glycol, applied in the direction of lubricating compositions, etc., can solve the problems of no one reporting, and achieve the effects of light pollution, reduced emissions, and improved quality of use
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Embodiment 1
[0012] After mixing the silicon chip cutting waste mortar with water, use a microwave reactor at 60°C to react for 1 hour, and then perform the first-stage solid-liquid separation to obtain the first-stage suspension and the first-stage solid particles; The first-level solid particles are diluted with water and then subjected to second-level solid-liquid separation to obtain a second-level suspension and second-level solid particles; the second-level suspension is used to mix the silicon wafer cutting waste mortar, and the The second-stage solid particles are subjected to third-stage centrifugation after the first-stage water washing to obtain a third-stage centrifugal liquid and third-stage centrifugal solid particles; the third-stage centrifugal liquid is reused in the first-stage Washing with water, drying and screening the third-stage centrifugal solid particles to obtain silicon carbide; filtering, decolorizing and resin-exchanging the first-stage suspension, followed by v...
Embodiment 2
[0014] After mixing the silicon chip cutting waste mortar with water, use a microwave reactor at 25°C to react for 2 hours, and then perform the first-stage solid-liquid separation to obtain the first-stage suspension and the first-stage solid particles; The first-level solid particles are diluted with water and then subjected to second-level solid-liquid separation to obtain a second-level suspension and second-level solid particles; the second-level suspension is used to mix the silicon wafer cutting waste mortar, and the The second-stage solid particles are subjected to third-stage centrifugation after the first-stage water washing to obtain a third-stage centrifugal liquid and third-stage centrifugal solid particles; the third-stage centrifugal liquid is reused in the first-stage Washing with water, drying and screening the third-stage centrifugal solid particles to obtain silicon carbide; filtering, decolorizing and resin-exchanging the first-stage suspension, followed by ...
Embodiment 3
[0016] After mixing the silicon wafer cutting waste mortar with water, react in a microwave reactor at 80°C for 30 minutes, and then perform the first-stage solid-liquid separation to obtain the first-stage suspension and the first-stage solid particles; The first-level solid particles are diluted with water and then subjected to second-level solid-liquid separation to obtain a second-level suspension and second-level solid particles; the second-level suspension is used to mix the silicon wafer cutting waste mortar, and the The second-stage solid particles are subjected to third-stage centrifugation after the first-stage water washing to obtain a third-stage centrifugal liquid and third-stage centrifugal solid particles; the third-stage centrifugal liquid is reused in the first-stage Washing with water, drying and screening the third-stage centrifugal solid particles to obtain silicon carbide; filtering, decolorizing and resin-exchanging the first-stage suspension, followed by ...
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