Methanol carbonyl oxidation synthesis of dimethyl carbonate device

Abstract

The invention relates to a device for synthesis of dimethyl carbonate by methanol carbonyl oxidization, the device includes a tubular reaction segment, the upper end of the tubular reaction segment is a reactor gas-liquid separation section, the upper part of the tubular reaction segment is provided with a methanol feeding port, the lower part of the tubular reaction segment is provided with a CO and O2 mixed gas feed port, and also provided with an external circulating pipeline extending from the bottom of the tubular reaction segment to the methanol feeding port at the upper part of the tubular reaction segment, the external circulating pipeline is provided with a centrifugal pump, and the centrifugal pump can forcibly delivery a gas-liquid reaction raw material on the bottom of the tubular reaction segment to the top of the tubular reaction segment. The device for synthesis of the dimethyl carbonate by methanol carbonyl oxidization replaces a reflux vice reaction tube by the circular pipeline with the centrifugal pump, can effectively prevent the local deposition of a catalyst in a reactor, strengthens cycle of the catalyst in the device, significantly increases the contact area, and gives full play to the catalytic effect of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of organic compound synthesis, and more specifically, the invention relates to a device for synthesizing dimethyl carbonate by methanol carbonyl oxidation. Background technique [0002] As people pay more and more attention to environmental issues, all countries in the world have put forward higher requirements for the production of chemicals, and the development of environmentally friendly green chemicals has become an inevitable trend of development. Dimethyl carbonate (DMC), as a slightly toxic and environmentally friendly green chemical product, can be used as a raw material for organic synthesis to replace phosgene, methyl chloroformate and dimethyl sulfate as carbonylation, methylation and formazan Oxygenating reagents can also be used as gasoline, diesel additives and solvents. [0003] The methanol liquid-phase oxidative oxo synthesis method was first successfully developed by the Italian company En...

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of reactor is that the volume of the reactor is large, the ratio of the effective reaction volume to the total volume is small, the heat loss is large, the catalyst may be deposited in a certain part of the reactor, and the actual catalytic effect cannot be achieved.

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