Deactivation Mechanism of an Ionic Liquid Catalyst in Transesterification to Dimethyl Carbonate,Chemical Engineering & Technology

当前位置： X-MOL 学术 › Chem. Eng. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Deactivation Mechanism of an Ionic Liquid Catalyst in Transesterification to Dimethyl Carbonate
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2022-08-03 , DOI: 10.1002/ceat.202200315
Junteng Ma ₁ , Weihua Shen ₁ , Wenxuan Wei ₁ , Yunjin Fang ₁

Affiliation

The catalytic activity of an ionic liquid catalyst decreased during the transesterification of propylene carbonate (PC) with methanol to dimethyl carbonate (DMC). The interaction between the strong basic sites of ionic liquid catalyst and carbonyl compounds of PC and/or DMC was considered to attribute to this deactivation. The presence of H₂O accelerated this process by the formation of OH^–. The strong basic ionic liquid reacted with the trace amount of H₂O in the reaction system to generate OH^–, which then reacted with the carbonyl structure in PC and/or DMC to form the inactive compound HCO₃^–, resulting in the deactivation of the ionic liquid catalyst. A plausible mechanism was proposed for the deactivation of the ionic liquid catalyst in this reaction.

中文翻译：

离子液体催化剂在酯交换制碳酸二甲酯中的失活机理

离子液体催化剂的催化活性在碳酸亚丙酯 (PC) 与甲醇酯交换生成碳酸二甲酯 (DMC) 的过程中降低。离子液体催化剂的强碱性位点与 PC 和/或 DMC 的羰基化合物之间的相互作用被认为是这种失活的原因。H ₂ O 的存在通过形成 OH ^-加速了这一过程。强碱性离子液体与反应体系中微量的H ₂ O反应生成OH ^-，然后与PC和/或DMC中的羰基结构反应生成惰性化合物HCO ₃^-，导致离子液体催化剂失活。提出了一种合理的机制来使该反应中的离子液体催化剂失活。

更新日期：2022-08-03

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11