Overview:

Dimethyl carbonate, referred to as DMC, is a colorless, transparent liquid with a pungent odor at room temperature. The relative density (d204) is 1.0694, the melting point is 4℃, the boiling point is 90.3℃, and the flash point is 21.7℃ (opening) 16.7℃ ( Closed mouth), refractive index (nd2Chemicalbook0)1.3687, flammable, non-toxic. It can be mixed with almost all organic solvents such as alcohols, ketones, and esters in any proportion, and is slightly soluble in water. Can be used as methylating reagent. Compared to other methylating reagents, such as methyl iodide and dimethyl sulfate, dimethyl carbonate is less toxic and biodegradable

Chemical Properties

Colorless and transparent liquid with pungent odor. Insoluble in water, soluble in organic solvents such as ethanol and ether.

use

1. A new type of low-toxic solvent can replace toluene, xylene, ethyl acetate, butyl acetate, acetone or methyl ethyl ketone and other solvents in the paint and adhesive industries. It is an environmentally friendly green chemical product.

2. Good methylating agent, carbonylating agent, hydroxymethylating agent and methoxylating agent. It is widely used in the fields of food antioxidants, plant protection agents and other fields. It is a widely used chemical raw material.

3. An ideal substitute for highly toxic chemicals such as phosgene, dimethyl sulfate, Chemicalbook methyl chloroformate, etc.

4. Synthesize polycarbonate, diphenyl carbonate, isocyanate, etc.

5. In medicine, it is used to synthesize anti-infective drugs, antipyretic and analgesic drugs, vitamin drugs, and central nervous system drugs.

6. In terms of pesticides, it is mainly used to produce methyl isocyanate, and then to produce certain carbamate drugs and insecticides (anisole).

7. Gasoline additives, lithium battery electrolyte, etc.

The production method is obtained by reacting methyl chloroformate and methanol. The raw material methyl chloroformate used in the reaction is obtained by the reaction of methanol and phosgene. During preparation, this phosgenation product can also be synthesized by adding excess methanol and refluxing the reaction without separation to synthesize dimethyl carbonate. The above reaction is called the traditional phosgene method in Chemicalbook. The transesterification method involves the transesterification reaction between ethylene carbonate or propylene carbonate and methanol to produce dimethyl carbonate. This method has high yield, low corrosive equipment, and mild reaction conditions. However, the source of raw materials is restricted by the development of the petrochemical industry and the element utilization rate is low.

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