Method for co-production of sodium methoxide through methanol gas phase dehydration dimethyl ether manufacturing device and device thereof

Abstract

The invention relates to a method and device for co-production of sodium methoxide through a methanol gas phase dehydration dimethyl ether manufacturing device. The co-production device comprises a methanol intermediate storage tank, a methanol feeding pump, a methanol rectifying tower, a reactor, a dimethyl ether rectifying tower, a water methanol conveying pump, a methanol collecting tank, a flash evaporation stripping tower, a sodium methoxide reaction tower, a newly increased methanol rectifying tower and a newly increased pump. Sodium methoxide can be produced by slight adjustment of the method and the device based on the methanol gas phase dehydration dimethyl ether manufacturing device, and the method and the device are an efficient and energy-saving production process and device.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a method and a device for co-producing sodium methoxide in a methanol gas-phase dehydration device for producing dimethyl ether. Background technique [0002] As an important chemical raw material, dimethyl ether (DME) has a wide range of uses. The most mature method for industrially preparing dimethyl ether is methanol vapor phase dehydration, and its reaction equation is as follows: [0003] 2CH 3 OH→CH 3 OCH 3 +H 2 o [0004] The main feature of this reaction is that there is a methanol rectification tower, and the water-containing methanol in the dimethyl ether rectification tower tank is purified by rectification to obtain refined methanol and return it as raw material. Although the recycling of raw materials has been realized, However, the rectification process also consumes a large amount of heat energy, and the recovered refined methanol is in a liquid state. When...

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Problems solved by technology

[0004] The main feature of this reaction is that there is a methanol rectification tower, and the water-containing methanol in the dimethyl ether rectification tower tank is purified by rectification to obtain refined methanol and return it as raw material. Although the recycling of raw materials has been realized, However, the rectification process also consumes a large amount of heat energy, and the recovered refined methanol is in a liquid state. When it is returned as a raw material, it needs to be heated and vaporized, which also consumes a large amount of heat energy. Therefore, as far as the simple production of dimethyl ether is concerned, the set The energy consumption of production equipment is high, the product is single, and the economic cost is high

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