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Method for separating solids from liquid of dregs in production process of organic silicon

A production process, solid-liquid separation technology, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of difficulty in discharging residual solids, containing high-boiling organic silicon, incomplete hydrolysis, etc., to achieve Waste utilization, overcoming the difficulty of discharging, and improving the effect of porosity

Inactive Publication Date: 2015-06-17
LUZHOU NORTH CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to reclaim a large amount of organosilicon high boilers by vacuum distillation, and hydrolyze the residual organosilicon high boilers in the remaining solids, so as to overcome the incomplete hydrolysis in the previous technology, which caused the hydrolyzed solids to contain Silicone high boiling matter and other problems; at the same time adding a bulking agent to overcome the problem of difficult discharge of residual solids after distillation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 100 parts by weight of organic silicon slurry residue (which contains copper, silicon powder, high boiling substances, etc., solid-to-liquid ratio = 3:7), add 10 parts by weight of calcium carbonate, stir for 0.5h, heat up to 130°C, and start the vacuum system , Condensation system, control the vacuum degree to be -0.08Mpa and distill until no high boilers are distilled out, stop the vacuum system and condensation system, collect 30 parts of high boilers; then add the residue after distillation to 100 parts, the concentration is After being fully hydrolyzed in 1wt% sodium carbonate solution, filter and collect the solid. The copper content in the solid is 3.5%, and the silicon powder is 45.8%.

Embodiment 2

[0028] Add 100 parts by weight of organic silicon slurry residue (which contains copper, silicon powder, high boilers, etc., solid-to-liquid ratio = 3:7), add 50 parts by weight of sodium carbonate, stir for 1 hour, heat up to 150 ° C, start the vacuum system, Condensation system, control the vacuum degree to -0.07Mpa and distill until no high boiling matter is distilled out, stop the vacuum system and condensation system, collect 30 parts of high boiling matter; then add the distilled solid to 80 parts, concentration After being fully hydrolyzed in 40wt% calcium carbonate solution, filter and collect the solid, the copper content in the solid is 3.9%, and the silicon powder is 47%.

Embodiment 3

[0030] Add 20 parts by weight of sodium carbonate to 100 parts by weight of organic silicon slurry (which contains copper, silicon powder, high boiling substances, etc., solid-to-liquid ratio = 3:7), stir for 1 hour, heat up to 140 ° C, start the vacuum system, Condensation system, control the vacuum degree to be -0.07Mpa and distill until no high boilers are distilled out, stop the vacuum system and condensation system, collect 30 parts of high boilers; then add the distilled solids to 80 parts to fully After hydrolysis, filter and collect the solid, the copper content in this solid is 3.8%, and the silicon powder is 46.8%.

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PUM

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Abstract

The invention belongs to the field of chemical engineering, and particularly relates to a method for separating solids from liquid of dregs in the production process of organic silicon. According to the technical scheme aiming at the technical problem, the method comprises the steps of: adding a bulking agent into dregs according to the mass ratio of dregs to bulking agent being 1:0.5-1:0.01, stirring, then distilling, collecting high-boiling dregs, and adding hydrolyte into the distilled solids so that the distilled solids are fully hydrolyzed. The method overcomes the problems that the remaining distilled solids are difficult to discharge, and the treatment process in the technology is simple and easy to operate, the high-boiling dregs of the organic silicon can be recycled, so that the cost can be lowered, and the environment pollution can also be reduced.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for solid-liquid separation of pulp residue in the production process of organic silicon. Background technique [0002] Slurry in the production of organic silicon (hereinafter referred to as slurry) is a liquid-solid mixture with fluidity obtained by wet dust removal during the synthesis of methyl chlorosilane monomer. Slurry is treated at 200°C Flash evaporation is carried out at a temperature of about 3:7, and the solid-liquid ratio of the slurry after discharge is about 3:7. The liquid phase in the flash-evaporated slurry is mainly organosilicon high boilers, and the solid phase is mainly suspended silicon powder, high content Copper and other metals, if these materials are exposed to the air, they will burn and form strong acid liquid to pollute the environment. Therefore, it is necessary to distill the pulp slag after flash evaporation, and then carry ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/037C22B15/00
CPCY02P10/20
Inventor 徐志远唐纹涛李争鸣林阳杨文俊孙晓泉张文博
Owner LUZHOU NORTH CHEM IND