The present invention relates to a method for producing a carbonate compound and methacrylic acid or an ester thereof, containing a step (a1) of obtaining hexachloroacetone and hydrogen chloride from acetone and chlorine molecule, a step (a2) of obtaining a dialkyl carbonate and chloroform from hexachloroacetone and an alkyl alcohol, a step (b1) of obtaining 1,1,1-trichloro-2-methyl-2-propanol from chloroform and acetone, a step (b2+b3 or b4) of obtaining methacrylic acid or an ester thereof and hydrogen chloride from 1,1,1-trichloro-2-methyl-2-propanol and water or an alcohol, and a step (c1 or c2) of obtaining chlorine molecule by reacting hydrogen chloride with oxygen molecule.

The present invention relates to a method for producing a carbonate compound and methacrylic acid or an ester thereof, containing a step (a1) of obtaining hexachloroacetone and hydrogen chloride from acetone and chlorine molecule, a step (a2) of obtaining a dialkyl carbonate and chloroform from hexachloroacetone and an alkyl alcohol, a step (b1) of obtaining 1,1,1-trichloro-2-methyl-2-propanol from chloroform and acetone, a step (b2+b3 or b4) of obtaining methacrylic acid or an ester thereof and hydrogen chloride from 1,1,1-trichloro-2-methyl-2-propanol and water or an alcohol, and a step (c1 or c2) of obtaining chlorine molecule by reacting hydrogen chloride with oxygen molecule.

The present disclosure provides a process for producing dimethyl carbonate with high conversion rate. Alkylene glycol reacts with urea via alcohylysis reaction to produce alkylene carbonate and ammonia. The alkylene carbonate produced reacts with methanol via transesterification reaction to produce dimethyl carbonate. Before the dimethyl carbonate is separated from the mixture, the nitrogen-containing impurities are substantially removed. Unreacted feedstock and catalysts are recycled in the process.

The present invention refers to a process for preparing carbonyl-containing compounds of formula (Ia), (Ib) or (Ic):

##STR00001##

from Bisphenol A-based Polycarbonate and appropriate nucleophiles in the presence of imidazole or a derivative thereof as catalyst and an organic solvent.

The present invention refers to a process for preparing carbonyl-containing compounds of formula (Ia), (Ib) or (Ic):

##STR00001##

from Bisphenol A-based Polycarbonate and appropriate nucleophiles in the presence of imidazole or a derivative thereof as catalyst and an organic solvent.

Linear or cyclic carbonates as potential monomers for isocyanate-free polyurethanes and polycarbonates were prepared from polyols and dialkyl carbonates or diphenyl carbonates. This invention was developed to produce linear or cyclic carbonates with or without using catalysts. Polyol compounds were reacted with carbonates such as dimethyl carbonate and diethyl carbonate to produce the corresponding linear and/or cyclic carbonate.

Linear or cyclic carbonates as potential monomers for isocyanate-free polyurethanes and polycarbonates were prepared from polyols and dialkyl carbonates or diphenyl carbonates. This invention was developed to produce linear or cyclic carbonates with or without using catalysts. Polyol compounds were reacted with carbonates such as dimethyl carbonate and diethyl carbonate to produce the corresponding linear and/or cyclic carbonate.

Linear or cyclic carbonates as potential monomers for isocyanate-free polyurethanes and polycarbonates were prepared from polyols and dialkyl carbonates or diphenyl carbonates. This invention was developed to produce linear or cyclic carbonates with or without using catalysts. Polyol compounds were reacted with carbonates such as dimethyl carbonate and diethyl carbonate to produce the corresponding linear and/or cyclic carbonate.

The present disclosure provides a dialkyl carbonate prepared from a methyl branched primary C.sub.16-C.sub.17 alcohol. The dialkyl carbonate is prepared by transesterifying a reactant dialkyl carbonate with the methyl branched primary C.sub.16-C.sub.17 alcohol under transesterification reaction conditions. The subsequently produced dialkyl carbonate may be used in various applications, including, but not limited to, in lubricating, cosmetic and textile products and applications.

The present disclosure provides a dialkyl carbonate prepared from a methyl branched primary C.sub.16-C.sub.17 alcohol. The dialkyl carbonate is prepared by transesterifying a reactant dialkyl carbonate with the methyl branched primary C.sub.16-C.sub.17 alcohol under transesterification reaction conditions. The subsequently produced dialkyl carbonate may be used in various applications, including, but not limited to, in lubricating, cosmetic and textile products and applications.