Methyl chloride recovery and refining method

A technology of methyl chloride and methyl chloride tower, which is applied in the field of recovery and refining of methyl chloride, can solve the problems of rising cost of crude monomer production and energy waste, and achieve the effects of saving equipment, significant economic benefits, and energy saving

Active Publication Date: 2009-04-29
SHANDONG DONGYUE ORGANIC SILICON MATERIAL +1
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Problems solved by technology

The disadvantage of the methyl chloride recovery process is that there is unnecessary waste of energy in the feed and discharge process of the methyl chloride refining tower, which leads to an increase in the cost of producing crude monomers

Method used

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  • Methyl chloride recovery and refining method

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Embodiment Construction

[0007] Technical scheme of the present invention is as follows:

[0008] A method for recovering and refining methyl chloride. The crude methyl chloride gas from the tail cooler of the washing tower is compressed by a methyl chloride compressor, and then directly enters the methyl chloride gas in the form of a gas phase from the feed port below the reflux liquid inlet of the crude monomer tower. The recovered methyl chloride gas extracted from the upper side line of the methyl chloride tower is directly introduced into the methyl chloride superheater, and then sent to the fluidized bed after heating to participate in the fluidization reaction.

[0009] The temperature of the compressed methyl chloride gas compressed by the methyl chloride compressor is 110-125°C and the pressure is 0.8-0.9Mpa.

[0010] The above-mentioned methyl chloride tower top is a total reflux operation, the gas discharged from the top of the tower is condensed by the condenser, the condensate enters the ...

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Abstract

The invention relates to a recycling and refining method of chloromethane. After being condensed by a chloromethane compressor, the coarse chloromethane gas from a washing tower end cooler enters into a chloromethane tower for refining in gas phrase state from an inlet under a return flow inlet of a coarse monomeric tower; the recycled chloromethane gas obtained from the upper lateral line of the chloromethane tower is directly led into a chloromethane superheater, is heated and then flows into a fluidized bed to carry out fluidized reaction. The invention improves the charging and discharging technical process of the present chloromethane refining tower and simplifies the unnecessary processes, which greatly reduces the investment to disposable equipment and the energy consumption in the production process, thereby reaching the purpose of saving equipment and energy.

Description

technical field [0001] The invention relates to a method for recovering and refining methyl chloride in the synthesis and production of organosilicon monomers. Background technique [0002] In the synthesis production process of methyl chlorosilane monomer, since the one-way conversion rate of raw material methyl chloride is relatively low, generally between 20% and 40%, the circulation of methyl chloride is large, and the energy consumption in the process of recovering and refining methyl chloride accounts for the majority of monomer synthesis. The proportion of the production cost of the device is very large, and the improvement of the process flow still has the potential of saving energy and reducing consumption. [0003] In the existing methyl chloride recovery system, the feeding and discharging process of the methyl chloride refining tower: the crude methyl chloride gas from the tail cooler of the scrubber, which accounts for about half of the recovered methyl chloride...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/03C07C17/38C07F7/12
Inventor 王维东伊港赵玉芳
Owner SHANDONG DONGYUE ORGANIC SILICON MATERIAL
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