Method and device for recovering efficient high-boiling substance from organic silicon residue slurry

An organic silicon slurry technology with high efficiency, applied in the direction of silicon organic compounds, organic chemistry, chemical instruments and methods, etc., can solve the problems of high solid content in slurry, high requirements for conveying devices and stirring devices, and ineffective utilization , to achieve the effect of high cracking rate, low requirements for stirring and conveying devices, and avoiding fires

Inactive Publication Date: 2015-11-11
HUBEI XINGRUI SILICON MATERIAL CO LTD
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  • Application Information

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Problems solved by technology

This method recovers a large amount of high boiling matter, but contains less active ingredients (disilane and trisilane). Therefore, a large amount of recovered high boiling matter cannot be effectively used and becomes waste again; the solid content of the slurry in the evaporator is high , resulting in high requirements for conveying devices and stirring devices

Method used

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  • Method and device for recovering efficient high-boiling substance from organic silicon residue slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Turn on the heating device and stirring device of the distillation kettle, the stirring speed is about 60 rpm, turn on the circulating water device of the top condenser, and synthesize the methyl chlorosilane monomer into the slurry from the washing tower reboiler (temperature 200 °C, containing The solid content is about 25%), and it is directly discharged into the still at a rate of 0.8t / h to control the liquid level of the still.

[0028] The temperature is maintained at 170°C, and when liquid appears in the distributor at the top of the packed column, the extraction of high boilers is controlled. When the recovery rate of high boiling substances is 0.3t / h, the cracking rate of the obtained high boiling substances reaches 86%. After the liquid level of the distillation kettle reaches a high level and alarms, the distillation is stopped, and the high temperature residue is discharged into the cooling kettle and cooled to 60°C After the discharge system, the solid cont...

Embodiment 2

[0030] Other implementation conditions are the same as 1. When the recovery rate of the high-boiler receiving tank is 0.4t / h, the cracking rate of the produced high-boiler is only 70%, and the solid content of the discharged residue increases by about 25%. The residue discharge is not smooth and the resistance is relatively large.

Embodiment 3

[0032] Other implementation conditions are the same as 1. When the recovery rate of the high-boiler receiving tank reaches 0.25t / h, the cracking rate of the produced high-boiler is as high as 90%, and the solid content of the discharged residue increases by about 11.4%.

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Abstract

The invention provides a method and a device for recovering efficient high-boiling substance from organic silicon residue slurry. The method mainly comprises the following steps: discharging residue slurry from a reboiler of an organic silicon monomer synthesis washing tower into a distillation still; utilizing waste heat to evaporate high-boiling residues in the residue slurry; carrying out rectification in a packing tower; collecting the recificated product; conveying the collected product into a high-boiling lysis device; cooling down residual slug; discharging the cooled residual slug. The invention has the advantages that the waste heat of the monomer synthesis system is sufficiently utilized, and the temperature of the distillation still and the evaporation rate of the high-boiling residue are controlled, part of high-boiling residue of high lysis value is selectively recovered. Practices show that the lysis rate of the high-boiling residue treated according to the method reaches 80 percent or higher in lysis rate, the solid content of discharged residue is improved by 15 to 25 percent, the utilization value of the high-boiling residue is greatly improved, and the residue slug treatment cost is reduced.

Description

technical field [0001] The invention belongs to the field of chemical organosilicon production and provides a method for recovering effective high boilers from organosilicon slurry. Background technique [0002] With the improvement of our people's living standards and comprehensive national strength, the demand for organosilicon monomers and organosilicon materials is increasing rapidly. According to statistics, by the end of 2011, the total production capacity of 15 domestic methylchlorosilane monomer manufacturers reached about 1700kt / a. 3~5% of the total output, the organosilicon monomer production device with a production capacity of 80kt / a, produces about 2400~4000 tons of slurry every year. [0003] The composition of organosilicon slurry is complex, mainly composed of a large amount of liquid high boilers (disilane, siloxane, trisilane, etc., which are produced during the synthesis of methyl chlorosilane monomer and have a boiling range of 80-215°C). Mixture) and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/20C07F7/12
Inventor 高英王文金聂兴臻何云飞吴让鹏
Owner HUBEI XINGRUI SILICON MATERIAL CO LTD
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