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Energy-saving water-saving organic silicon monomer rectifying method

An organosilicon and water-saving technology, which is applied in organic chemistry, silicon organic compounds, chemical instruments and methods, etc., can solve the problems of large loss of excess monomer and A, and achieve reduced evaporation loss, more control means, and lower circulation The effect of water volume

Active Publication Date: 2010-08-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the 8-tower process is directly separated from the binary tower. Without recycling, it may cause a large loss of the surplus monomer.

Method used

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  • Energy-saving water-saving organic silicon monomer rectifying method
  • Energy-saving water-saving organic silicon monomer rectifying method
  • Energy-saving water-saving organic silicon monomer rectifying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The overhead material steam of the decontamination tower first enters the distribution manifold, and then passes through the distribution manifold to the towers of the decontamination tower, the light separation tower, the hydrogen-containing tower, the azeotropic tower, the top three towers, the first top tower, and the second top tower. The bottom reboiler supplies heat. After heating, the top material vapor of the de-elevation tower is condensed into a liquid which is cooled to the reflux temperature by an air cooler and enters the top reflux tank of the de-elevation tower. The bottom of the dimethyl tower is connected with a first Two reboiler, the second reboiler adopts steam heat exchange, the average operating pressure of the whole tower of the de-elevation tower is 300KPa, the temperature of the bottom of the tower is controlled at 135°C, and the temperature of the top of the tower is controlled at 120°C; The average operating pressure of the entire tower of the f...

Embodiment 2

[0025] The overhead material steam of the decontamination tower first enters the distribution manifold, and then passes through the distribution manifold to the towers of the decontamination tower, the light separation tower, the hydrogen-containing tower, the azeotropic tower, the top three towers, the first top tower, and the second top tower. The bottom reboiler supplies heat. After heating, the top material vapor of the de-elevation tower is condensed into a liquid which is cooled to the reflux temperature by an air cooler and enters the top reflux tank of the de-elevation tower. The bottom of the dimethyl tower is connected with a first The second reboiler, the second reboiler adopts steam heat exchange, the average operating pressure of the whole tower of the de-elevation tower is 500KPa, the temperature at the bottom of the tower is controlled at 125°C, and the temperature at the top of the tower is controlled at 130°C; The average operating pressure of the whole tower of...

Embodiment 3

[0028] The overhead material steam of the decontamination tower first enters the distribution manifold, and then through the distribution manifold to the bottom reboiler of the decontamination tower, light separation tower, hydrogen-containing tower, azeotrope tower, trimethyl tower and dimethyl tower respectively After heating, the vapor of the top material of the decontamination tower is condensed into liquid and then cooled to the reflux temperature by the air cooler and enters the top reflux tank of the decontamination tower. The bottom of the dimethyl tower is connected with a second reboiler , The overhead material steam of the first A tower supplies heat to the second reboiler of the second A tower, together with the first reboiler heated by the top steam of the decontamination tower, to maintain the operation of the second A tower. The top material steam of the first tower enters the top reflux tank of the first tower after heating, and the bottom reboiler of the first t...

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Abstract

The invention discloses an energy-saving water-saving organic silicon monomer rectifying method which adopts a cis cleavage multi-tower flow. In the rectifying method, the tower top material steam of a high-boiling component removing tower firstly enters a main distribution manifold, then heat is respectively supplied for tower bottom reboilers of a low-boiling component removing tower, a light component removing tower, a hydrogenous tower, an azeotropic tower, a trimethylchlorosilane separating tower, a methyl trichloro silicane separating tower and a dimethyldichlorosilane separating tower through the main distribution manifold, the tower top material steam of the high-boiling component removing tower after heat supply is condensed into liquid, is then cooled to the reflux temperature through an air cooler and enters a tower top reflux tank of the high-boiling component removing tower, a second reboiler is connected with the tower bottom of the dimethyldichlorosilane separating tower, and vapor is adopted for the heat exchange of the reboiler. By adopting the method, because the operating pressure and the operating temperature of the high-boiling component removing tower and the methyl trichloro silicane separating tower with larger cooling quantity requirements are increased, at least two towers in the flow have the condition of adopting air cooling, thereby reducing the circulating water quantity and decreasing the evaporation loss; and the energy-saving water-saving organic silicon monomer rectifying method has strong operation controllability, flexible mode, multiple control means, smaller pressure increasing amplitude and high operation security.

Description

Technical field [0001] The invention relates to an organosilicon monomer rectification method, in particular to an energy-saving type organosilicon monomer rectification technology. Background technique [0002] The methods for separating crude organochlorosilane monomers include physical separation and chemical separation, and distillation is mainly used in industry. Among them, the characteristic of the traditional 7-tower process is that dimethyldichlorosilane and monomethyltrichlorosilane must be cut clearly in the dimethyl tower, and there is no circulation in the process. At present, in addition to the traditional 7-tower process, the first towers of many domestic production plants for methylchlorosilane are all high-removal towers, but the processing sequence from the second tower to the next is different. According to the processing sequence, the rectification and separation process of the crude organochlorosilane monomer can be divided into four types: 10-tower process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/12C07F7/20
CPCY02P20/10
Inventor 孙津生吴鹏高红王艳红苏燕霞闫东李婧
Owner TIANJIN UNIV
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