Sharjah Chemicals is leading Supplier, Manufacture and Exporter of Dimethyl Oxalate in Sharjah UAE, Al Qusais, Deira, Saif Zone, Fujairah,Dubai, Abudhabi, Ajman, Diera, UAE Middle East, Al Quoz, Jebel Ali, Umm Al Quawain, Ras Al Khaimah, Masafi, Khor Fakkan, Al Hayl, Al Ain, Ras Al Khor Industrial Area, Al khubaisi, Um Ramool Industrial Area, Al Qusais Industrial Area, Jebel Ali.
Dimethyl Oxalate is the organic compound with the formula (CH3O2C)2. It is the dimethyl ester of oxalic acid. Dimethyl oxalate is a colorless or white solid that is soluble in water.
Diethyl Oxalate is used especially for production of pesticides and also as a starting material of so-called oxalate syntheses used in many areas, such as in pharmaceutical industry (production of steroids, barbiturates), in dyeing industry (Tartrazin dyestuff) and other specialised chemicals and in PU and plastic industry.
Dimethyl oxalate is used for alkylation and in the cosmetics industry as a chelating agent.
For countries with low oil but large coal reserves (meaning countries with large potential for synthesis gas based chemistry, e.g. china), the oxidative carbonylation of methanol provides a promising approach to the important C2-basic chemical ethylene glycol. Dimethyl oxalate can be converted into ethylene glycol in high yields (94.7%) by hydrogenation at a copper-containing catalysts.
The methanol formed is recycled in the process of oxidative carbonylation; therefore the only raw materials consumed in the overall process are carbon monoxide, hydrogen and oxygen. One plant following that coal-to-MEG process with a production capacity of 200,000 tons ethylene glycol per year is already operational in Inner Mongolia, a second plant with a capacity of 250,000 with tons/year was scheduled for 2012 in Henan. Other plants with a total annual capacity of more than 1 million tons of ethylene glycol per year are planned.
Furthermore, dimethyl carbonate is accessible by decarbonylation from dimethyl oxalate at temperatures around 100 °C in the presence of alkali metal alcoholates, which is discussed as a fuel additive from biomass (so-called oxygenate):
The formed carbon monoxide can be feed back to the reaction forming dimethyl oxalate .
Diphenyl oxalate is obtained by transesterification of dimethyl oxalate with phenol in the presence of titanium catalysts, which is again decarbonylated to diphenyl carbonate in the liquid or gas phase. Diphenyl carbonate can be used as a replacement for the highly toxic phosgene for the production of polycarbonates.
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