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What is Dimethyl carbonate?

Views:0     Author:Site Editor     Publish Time: 2021-11-05      Origin:Site

Introduction of dimethyl carbonate:

Dimethyl carbonate, referred to as DMC, is a colorless and transparent liquid with an irritating smell at normal temperature. ItsDimethyl carbonate buy - YuanfarChemical relative density (D204) is 1.0694, melting point 4℃ boiling point 90.3℃, flash point 21.7℃ (opening) 16.7℃ (closing), refractive index (ND20)1.3687, flammable and non-toxic. Can be mixed with alcohol, ketone, ester and almost all organic solvents in any proportion, slightly soluble in water. It can be used as a methylating reagent. Dimethyl carbonate is less toxic and biodegradable than other chemicalbooks, such as methanoiodide and dimethyl sulfate. In the past, the method of preparing dimethyl carbonate from phosgene is not commonly used. Instead, it is prepared by catalytic oxidation carbonylation of methanol in the presence of oxygen, which is more environmentally friendly than the previous method. Dimethyl carbonate can methylate aniline, phenols and carboxylic acids, but many reactions require high pressure. DBU can be added to reflux DMC to catalyze the methylation of carboxylic acid by dimethyl carbonate.

Dimethyl carbonate (DMC) has a unique molecular structure (CH3O-CO-OCH3). Its molecular structure contains carbonyl, methyl, methoxy and carbonyl methoxy, so it can be widely used in organic synthesis reactions such as carbonylation, methylation, methoxylation and carbonyl methylation, so it has a very wide range of uses. Mainly used as carbonylation and methylation reagents, gasoline additives, synthetic polycarbonate (PC) raw materials, etc. The large-scale production of DMC was developed along with the non-phosgene synthesis process of polycarbonate. 1, a new low toxic solvent in paint, adhesive industry can replace toluene, xylene, ethyl acetate, acetic acid Chemicalbook butyl ester, acetone or butyl ketone and other solvents, is environmentally friendly green chemical products. 2, good methylation agent, carbonylation agent, hydroxymethylation agent and methoxylation agent, is a widely used chemical raw materials. 3, phosgene, dimethyl sulfate, methyl chloroformate and other drugs ideal substitute. 4, synthesis of polycarbonate, diphenyl carbonate, isocyanate, etc. 5, medicine for the synthesis of anti-infection drugs, antipyretic analgesic drugs, vitamins, central nervous system drugs. 6, pesticides are mainly used in the production of methyl isocyanate, and then the production of some carbamate drugs, pesticides (anisole). 7, gasoline additives, lithium battery electrolyte, etc.

Three main categories of dimethyl carbonate market:

The market for dimethyl carbonate consists of three main categories: industrial grade, medical grade and battery grade. Industrial grade dimethyl carbonate occupies more than half of the market share. These produced dimethyl carbonate are mainly used in the production of polycarbonate and electrolyte solvents. The production processes of dimethyl carbonate are mainly gas phase oxidation carbonylation and liquid phase oxidation carbonylation. The main domestic processes are PO transesterification, two-step urea, one-step urea Chemicalbook, coal to ethylene glycol, methanol carbonyl oxidation and EO transesterification. SabicSpain, bayer of Germany and lotte of South Korea are the leading producers in the dimethyl carbonate market, producing 33.45% of the world's dimethyl carbonate in 2019, largely on their own. The development of domestic dimethyl carbonate is relatively stable. By 2020, China's production capacity of dimethyl carbonate will account for 58% of the world.

Recently, 300,000 tons of dimethyl carbonate has been put into production by Hualu Hengsheng, a leading enterprise in China's chemical industry, which is expected to greatly improve China's dimethyl carbonate market in the future

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