METHOD OF PRODUCING DIARYL CARBONATE Russian patent published in 2013 - IPC C07C68/06 C07C69/96 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing diaryl carbonate via re-esterification of an aromatic alcohol with dialkyl carbonate in the presence of a re-esterification catalyst over a time [t_a], wherein the aryl group is selected from an unsubstituted phenyl and mono-, di- and trisubstituted phenyl group, wherein the alkyl group is selected from C₂-C₄ linear and branched alkyl groups, wherein concentration of the catalyst is denoted by [c_a], which is expressed as the ratio of a gram of the catalyst per gram of the aromatic alcohol and dialkyl carbonate, wherein a period of time [t_m] and concentration of the catalyst [c_a] are defined with given approximation to equilibrium for re-esterification of the aromatic alcohol with dimethyl carbonate to obtain methyl aryl carbonate and methanol, wherein the product [c_a]*t_a is at least equal to 1.5*[c_m]*t_m, in, apart from that, the same reaction conditions and wherein the given approximation to equilibrium for re-esterification of the aromatic alcohol with dimethyl carbonate to obtain methyl aryl carbonate and methanol lies in the range from 70 to 100%.

EFFECT: method enables to obtain higher conversion of the aromatic alcohol.

13 cl, 1 dwg, 3 tbl, 16 ex