文献类型：专利

英文题名：Highly-stable titanium catalyst used in transesterification of dimethyl carbonate with phenol to produce methylphenyl carbonate and diphenyl carbonate, is obtained by reacting titanate with dicarbonyl compound, and then reacting with polyol

作者：FANG Y;GU K;SHEN W

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN107876092-A

申请日：2017-11-24

公开日：2018-04-06

语种：英文

收录：DERWENT

摘要：NOVELTY - A highly-stable titanium catalyst has a cyclic structure, and is obtained by reacting titanate with a dicarbonyl intermediate compound (I), and reacting the compound (I) with a polyol (II). USE - Highly-stable titanium catalyst is used in transesterification reaction of dimethyl carbonate with phenol to produce methylphenyl carbonate and diphenyl carbonate, and production of polycarbonate. ADVANTAGE - The titanium catalyst can be reused, and has excellent selectivity for transesterification reaction, strong water resistance and thermal stability, phenol conversion rate of more than 80%, and transesterification selectivity of 99%. DETAILED DESCRIPTION - The dicarbonyl intermediate compound is of formula (I). The polyol is of formula: CnH2n+2O2 (II). R1 = alkyl, haloalkyl or optionally substituted phenyl; R2 = alkyl-CH2-, -CH2-CH2-, -CH2-CH2-CH2- or group of formula (i);and R3 = -CH3, -CH2-CH3, or alkoxy.