Titanium silicalite-1 catalytic architecture: A new approach to make TS-1 applicable to industrial process

Abstract

TS-1 is a powerful catalyst for cyclohexanone ammoximation with excellent selectivity to the desired product (cyclohexanone oxine). However, due to its small particle size, the catalyst experienced agglomeration that drastically reduces its activity after reaction. A new TS-1 heterogeneous catalytic composite was developed by crystallizing submicron TS-1 on the bentonite clay support. TS-1 crystals grew on the bentonite surfaces and intercalated between the clay layers. The crystallization process of supported TS-1 was different to that of the unsupported one The fast crystallization on the bentonite led to the formation of silicalite-1 structure prior to Ti incorporation. The Ti distribution on clay-based TS-1 was the same as preferential sites for Si vacancies in silicalite-1. This finding would strengthen the understanding of Ti incorporation in TS-1. particularly in supported TS-1 materials. This is an abstract of a paper presented at the 8th World Congress of Chemical Engineering (Montreal, Quebec, Canada 8/23-27/2009).