Lithium doped TiO2 as catalysts for the transesterification of bisphenol-A with dimethyl carbonate

被引：16

作者：

Liang, Yanan ^{[1
]}

Su, Kunmei ^{[2
]}

Cao, Lei ^{[1
]}

Li, Zhenhuan ^{[1
]}

机构：

[1] Tianjin Polytech Univ, State Key Lab Separat Membranes & Membrane Proc, Natl Ctr Int Joint Res Separat Membranes, Tianjin 300387, Peoples R China

[2] Tianjin Polytech Univ, Sch Environm Sci & Chem Engn, Tianjin 300387, Peoples R China

来源：

MOLECULAR CATALYSIS | 2019年 / 465卷

关键词：

Bisphenol a; Dimethyl carbonate; Transesterification; Li doped TiO2; DIPHENYL CARBONATE; OXIDATIVE CARBONYLATION; INTERCHANGE REACTION; POLYCARBONATE SYNTHESIS; PHENOL; BIODIESEL; KINETICS; MELT; ZNO; OIL;

D O I：

10.1016/j.mcat.2018.12.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lithium doped TiO2 were prepared by simple impregnation, which was used as heterogeneous catalysts for the transesterification of DMC with BPA. The characterized results of FTIR, XRD, XPS, SEM, TEM and temperature programmed desorption of CO2 (CO2-TPD) showed that the structure and performance of the catalysts were obviously influenced by the doping amount of Li+ and calcining temperature. The optimum catalytic activity was obtained when the molar ratio of Ti/Li reached 6 and the calcination temperature came up to 400 degrees C, which was due to Li+ reaction with TiO2 to form surface Ti-O-Li at 400 degrees C (Ti/Li-6-400). When the transesterification of DMC with BPA was carried out at 160-180 degrees C over Ti/Li-6-400, BPA conversion reached 46.67%, and the yields of one-methylcarbonate-ended-BPA (MmC(1)) and two-methylcarbonate-ended-BPA (DmC(1)) achieved 36.36% and 5.97%, respectively, and only 9.3% methylation selectivity was detected. In addition, the possible transesterification mechanism was provided.

引用

页码：16 / 23

页数：8