An acidic layered clay is combined with a basic layered clay for one-pot sequential reactions
An acidic layered clay is combined with a basic layered clay for one-pot sequential reactions
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DOI：
10.1021/ja052386p
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发表时间：
2005-07-13
影响因子：
15
通讯作者：
Kaneda, K
中科院分区：
文献类型：
--
作者：
Motokura, K;Fujita, N;Kaneda, K
Ti4+交换蒙脱石(Ti4+-Mont)和水滑石(HT)是强固体Brnsted酸和碱，这两种粘土催化剂可以在同一反应器中使用，而不需要中和活性中心。由于Ti4+-蒙脱石在窄层间有活性的酸中心，大颗粒的碱中心与酸中心没有相互作用。各种酸碱反应，如酯化、缩醛、脱缩醛、Aldol反应、Michael反应和环氧化反应，都在一个反应器中同时使用Ti4+-Mont和HT进行。
A Ti4+-exchanged montmorillonite (Ti4+-mont) and a hydrotalcite (HT) are strong solid Brønsted acid and base, and these two clay catalysts could be used in a single reactor without neutralization of active sites. Because the Ti4+-mont have active acid site in the narrow interlayers, the base sites of large HT particles show no interaction with the acid sites. A variety of acid and base reactions, such as esterification, acetalization, deacetalization, aldol reaction, Michael reaction, and epoxidation, proceeded using both the Ti4+-mont and the HT in a single reactor.