Production increasing technology of dimethyl carbonate

Abstract

The invention provides a production increasing technology of dimethyl carbonate, which increases the production of dimethyl carbonate through chlorine and methyl alcohol. The technology basically comprises the following steps: incomplete chloro compounds produced by depth chloro during production of dimethyl carbonate are reacted with methyl alcohol, and dimethyl carbonate is further produced, so that the production increasing of dimethyl carbonate is realized. According to the technology, the production increasing of dimethyl carbonate is realized through chlorine and dimethyl carbonate, and the problems that chlorine in a chlor-alkali plant is excess in production capacity and difficult to utilize are effectively solved.

Description

technical field [0001] The invention relates to the field of dimethyl carbonate production, in particular to a process for increasing the production of dimethyl carbonate. Background technique [0002] Dimethyl carbonate (DMC) is an important organic chemical raw material with abundant downstream products. It is a colorless and transparent liquid with a slight fragrance at room temperature. It is miscible with common organic solvents and can be used as carbonylation reagent, methoxylation and formazan Base reagents, gasoline additives, etc. At present, there are two types of production processes for dimethyl carbonate, the phosgene synthetic route, which requires the use of highly toxic phosgene to generate methyl chloroformate, which has been banned in many developed countries; and the non-phosgene route of methanol carbonylation oxidation , transesterification and urea alcoholysis, methanol-CO2, electrochemical synthesis and other clean synthesis methods. Counclert et al...

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Problems solved by technology

Counclert et al. proposed a method of cyclically preparing solid phosgene, in which DMC was completely chlorinated to generate solid phosgene (BTC, solid phosgene melting point 79-82°C, white crystal at room temperature, boiling point 205.5°C), and then synthesized DMC with methanol, However, the reaction mechanism is not yet clear, the reaction by-products are complicated, and the yield of DMC is unstable.

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