关键词: 环戊烯, 戊二醛, 介孔分子筛, 原位法, W-HMS催化剂

Abstract: Using (NH4)2WO4 as tungsten source, a series of W-HMS catalysts were prepared by in-situ method to introduce active species WO3 into the framework of HMS mesoporous molecular sieves under various conditions. The catalytic performance of the catalyst for selective oxidation synthesis of glutaraldehyde from cyclopentene was investigated, the reusable times and regeneration conditions were studied as well. The prepared W-HMS catalysts were characterized by XRD and FT-IR techniques. Results showed that W-HMS catalyst prepared under the optimum conditions exhibited good activity and stability in glutaraldehyde synthesis the maximum yield of glutaraldehyde reached 78%. The catalyst was reused for more than seven times and the deactivated catalyst could be regenerated by high temperature calcination. It can be seen from the FT-IR spectra that W species was incorporated into the framework of the HMS molecular sieve successfully.

Key words: cyclopentene, glutaraldehyde, mesoporous molecular sieves, in-situ method, W-HMS catalyst