A kind of rectification system of silicon tetrachloride crude product
A technology of silicon tetrachloride and rectification system, which is applied in the direction of silicon halide compounds, halosilanes, etc., can solve the problems of cumbersome separation and purification process steps, and achieve the effects of good environmental emission performance, good purity, and simple structure
Active Publication Date: 2015-09-09
ZHEJIANG FUSHITE GROUP
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Problems solved by technology
Due to the presence of multiple chlorosilane components in the reaction process, the subsequent separation and purification process steps are relatively cumbersome
Method used
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[0015] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing;
[0016] Such as figure 1 Shown, a kind of rectification system of silicon tetrachloride crude product, comprises silicon tetrachloride crude product storage tank 1, delowering tower 3, low boiler storage tank 5, silicon tetrachloride and high boiler storage tank 7 , rectifying tower 9, silicon tetrachloride product storage tank 11 and water washing tower 15. Wherein, the outlet of the silicon tetrachloride crude product storage tank 1 is connected with the inlet of the de-lowering tower 3 by setting a first shield pump 2, so as to facilitate the continuous carrying out of the rectification reaction. A first condenser 4 is connected to the top of the de-lowering tower 3 , and enters the low boiler storage tank 5 after being condensed by the first condenser 4 . The bottom of the de-lowering tower 3 is connected to the silicon tetrachloride and high...
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Abstract
The invention relates to a rectifying system for a silicon tetrachloride crude product. The rectifying system comprises a silicon tetrachloride crude product storage tank, a low removing tower, a rectifying tower and a water scrubber, wherein a first canned motor pump is arranged between an outlet of the silicon tetrachloride crude product storage tank and an inlet of the low removing tower to connect the two; the bottom of the low removing tower is connected with a silicon tetrachloride and high-boiling residue storage tank; a second canned motor pump is arranged between the outlet the silicon tetrachloride and high-boiling residue storage tank and an inlet of the rectifying tower to connect the two; a second condenser is arranged at and connected with the upper part of the rectifying tower; the outlet of the second condenser is connected with and provided with a branching pipeline; one branch of the branching pipeline is connected with the rectifying tower through arranging a valve, and the other branch of the branching pipeline is connected with a silicon tetrachloride finished product storage tank through arranging the valve; the inlet of the water scrubber is respectively connected with a low-boiling-point substance storage tank and the silicon tetrachloride finished product storage tank. The rectifying system has the characteristics of simple structure, environmental protection, and good emission performance.
Description
technical field [0001] The invention belongs to the technical field of organosilicon monomer synthesis, in particular to a rectification system for crude silicon tetrachloride. Background technique [0002] Silicon tetrachloride, molecular formula: SiCl 4 , is a colorless, corrosive, nonflammable liquid with a choking odor. Forms dense smoke when exposed to moist air, rapidly hydrolyzes to liberate hydrogen chloride. The boiling point is 57.6°C. Melting point -70.0°C. It can be used in the manufacture of organosilicon compounds, such as fumed silica, tetraethyl orthosilicate, organosilicon oil, high-temperature insulating varnish, organosilicon resin, silicone rubber and heat-resistant gasket materials. High-purity silicon tetrachloride is used as a material for the manufacture of polycrystalline silicon, high-purity silicon dioxide, inorganic silicon compounds, and quartz fibers. It is used in the military industry to manufacture smoke screen agents, in the metallurgica...
Claims
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IPC IPC(8): C01B33/107
Inventor 方卫民谭军刘国晶汪建阳邱贤辉刘成国
Owner ZHEJIANG FUSHITE GROUP