Rectifying tower for high-boiling substances and technology for purifying high-boiling substances through rectification method
A high-boiling substance and rectifying tower technology, applied in the field of high-boiling substance rectifying towers, can solve the problems affecting the production quality of high-boiling silicone oil and the high content of high-boiling impurities
Pending Publication Date: 2018-12-11
TANGSHAN SANYOU SILICON IND
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Problems solved by technology
[0006] The purpose of the present invention is to solve the problem that the high-boiling point impurities in existing high-boiler products have a high content and seriously affect the production quality of high-boiler silicone oil, and the purpose is to provide a technology for preparing high-quality high-boiler and optimizing the quality of silicone oil production
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[0021] Attached below Figure 1-3 Describe the present invention in detail:
[0022] The temperature of the high boiling tower increases gradually from the top to the bottom of the kettle. During the downward process of the material in the tower, there is continuous material precipitation. The high-boiling organosilicon is sent to the high-boiling tower and heated in the high-boiling tower. The vaporization temperature of dimethyldichlorosilane in the high-boiling tower is relatively low, generally at 70.2°C. There are three temperature measurement points on the high-boiling tower, the top temperature measurement point shows a temperature of 65 °C, the middle temperature measurement point shows a temperature of 75 °C, and the tower kettle temperature is 130 °C.
[0023] According to the analysis of the substances contained in the organosilicon high boilers, the content of organomonosilane in the high boilers is the highest in the range of 81-125°C in the tower.
[0024] The...
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Abstract
The invention provides a rectifying tower for high-boiling substances. According to the rectifying tower, a tower top is provided with a gas phase outlet for outputting dimethyldichlorosilane; the bottom of a tower kettle is provided with a liquid phase outlet for discharging the high-boiling-point high-boiling substances; the portion between the position with the temperature of 81 DEG C and the position with the temperature 125 DEG C of a tower body of the rectifying tower is provided with a side-draw opening, and the side-draw opening outputs the low-impurity high-boiling substances mainly containing organic monosilane through a side-draw pipeline; and the side-draw pipeline is connected with a high-boiling silicon oil production working procedure. The invention further provides a technology for purifying the high-boiling substances through a rectification method. According to the technology, the high-boiling substances are heated at high temperature in a high-boiling tower, and thegas-phase dimethyldichlorosilane is drawn from the tower top; and the liquid-phase high-boiling-point high-boiling substances are drawn from the bottom of the tower kettle and is input into a high-boiling substance storage tank after being cooled, the tower body of the high-boiling-tower is provided with the side-draw opening, the side-drawn high-boiling substances are supplied to the high-boilingsilicon oil working procedure through a conveying pump for use, and the side-draw opening is positioned between the position with the temperature of 81 DEG C and the position with the temperature 125DEG C of the tower body. The technology has the advantages that the low-impurity high-boiling substances and the high-impurity high-boiling substances are extracted separately, and therefore the purification of high-boiling products can be realized.
Description
technical field [0001] The invention relates to a technology for purifying organic silicon high boilers, in particular to a process for purifying high boilers for producing high boiler silicone oil by a rectification method and a high boiler rectifying tower. Background technique [0002] Silicone high boiler is a yellow, pungent odor and strong corrosive high-boiling chlorosilane mixture produced during the synthesis of methylchlorosilane monomer. It can be used as a raw material for the production of high-boiling silicone oil through processing. [0003] At present, the recovery of VCM in the high boiler is to heat the high boiler to volatilize the vinyl chloride, and the remaining non-volatile liquid is transferred to the high boiler silicone oil production process for utilization. [0004] The main components of silicone high boilers are organomonosilane, methyl chlorodisilazane, methyl chlorodisilazane, and the boiling point of organomonosilane is 81-125 ° C; the boili...
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IPC IPC(8): B01D3/32C07F7/12C07F7/20
CPCB01D3/32C07F7/12C07F7/20
Inventor 刘胜芹赵作坤王议丁学志郑银虎刘彬范玉东孙国俊刘存泽张向杰周河江春兴郑海涛张春艳肖振坤窦洪亮牛帅张恩朴刘颖邓雅欣
Owner TANGSHAN SANYOU SILICON IND