Screening of solid acid catalysts for etherification of glycerol with isobutene under identical conditions
作者:Özge Deniz Bozkurt、Nur Bağlar、Serdar Çelebi、Alper Uzun
DOI:10.1016/j.cattod.2019.07.025
日期:2020.11
We compared the performance of more than 70 solid acid catalysts with Brønsted acid function for the etherification of glycerol with isobutene under identical reaction conditions of 75 °C, 10 bar, 6 h and with an isobutene/glycerol molar ratio of 3/1. The catalysts were selected from a wide range of solid acid catalysts including ion exchange resins, zeolites, silica, and heteropolyacids, and their
我们在相同的75°C,10 bar,6 h的反应条件下,异丁烯/甘油摩尔比为3/1的情况下,比较了70多种具有布朗斯台德酸功能的固体酸催化剂对甘油与异丁烯的醚化性能。催化剂选自各种固体酸催化剂,包括离子交换树脂,沸石,二氧化硅和杂多酸,以及通过简单处理对其对应物进行改性的催化剂,其中一半以上是首次针对该反应进行研究。对于改性的工业酸催化剂,在Amberlyst™型离子交换树脂中用Na +进行磺酸质子的部分阳离子交换后,所需的甘油叔丁基醚(DTBGE和TTBGE)的选择性从75 wt%提高到87 wt%阳离子; 通过水热蒸汽处理HY沸石(SiO 2 / Al 2 O 3 = 80)为66-85wt%;和从75至80重量%的La局部+沸石的-exchange将H-β(SIO 2 / Al的2 ö 3 = 300),所有甘油转化率都很高(90–100%)。负载量为50 wt%的杂多酸钨硅酸(T