图书馆订阅: Guest
Catalysis in Green Chemistry and Engineering

每年出版 4 

ISSN 打印: 2572-9896

ISSN 在线: 2572-990X

H-Index: 2

Indexed in

SYNTHESIS OF 3-METHOXYCATECHOL FROM PYROGALLOL AND DIMETHYL CARBONATE IN LIQUID PHASE SLURRY REACTOR

卷 1, 册 1, 2018, pp. 91-103
DOI: 10.1615/.2018020980
Get accessGet access

摘要

Selective mono O-methylation of pyrogallol (trihydroxy benzene) is traditionally carried out with a polluting homogenous base catalyst and various alkali salts. A heterogeneous catalytic system was developed to achieve the same in a liquid phase slurry reactor. Calcined hydrotalcite was synthesized by different synthesis routes, and its activity was studied for selective mono O-methylation of pyrogallol using dimethyl carbonate as a methylating agent. The reaction was optimized by studying different reaction parameters to illustrate the reaction kinetics. The reaction at optimum conditions, i.e., catalyst concentration of 0.035 g/cm3, 180°C, 1400 rpm, and mole ratio of pyrogallol to dimethyl carbonate (DMC) as 1:5 gave 52% conversion of pyrogallol with 89% selectivity toward 3-methoxy catechol. The catalyst is reusable over three cycles. The activation energy for the reaction was calculated as 8.81 kcal/mol. Use of DMC as the methylating agent adds the green content to the current work.

Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集 订购及政策 Begell House 联系我们 Language English 中文 Русский Português German French Spain