Chemically colorless liquid.
Soluble in alcohol, ether and other organic solvents, soluble in water.
USES for pharmaceutical and organic synthesis
Dimethyl methylate is an important raw material for the production of piperic acid.
The foreign maleate dimethyl ester is used as the raw material for the production of piperic acid, which is used in the process of production of piperic acid.
At present, our country related enterprise produces malonic acid dimethyl ester apart from the export, most of it is used to produce piperic acid.
Application gas chromatography standard.
In organic synthesis.
Use gas chromatographic contrast sample, organic synthesis.
The production method USES cyanide esterification.
Chloroacetate and sodium bicarbonate, sodium cyanide, and sodium cyanide.
The sodium hydrochloride is hydrolyzed by sodium propylene diacid, and then dimethyl methylenediate with methanol in the presence of sulphuric acid, which is then washed and distilled.
The amount of ester in industrial products is greater than 98%.
Raw material consumption quota: 120kg chloroacetate/t, sodium cyanide 551kg/t, methanol 955kg/t.
Abroad to develop new technology mainly catalytic carbonylation method, namely the chloroacetic acid ester, carbon monoxide and methanol as raw materials, in the presence of catalyst, synthesis of methyl malonate step reaction.
In contrast, the catalytic carbonylation process technology is advanced, but the process is complex, the reaction conditions are harsh, the industrialization realization has certain difficulty.