Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (1): 243-250.DOI: 10.3724/SP.J.1088.2013.20860

• Research papers • Previous Articles     Next Articles

Highly Efficient Synthesis of Methyl Ethyl Ketone Oxime through Ammoximation over Ti-MOR Catalyst

DING Jianghong, XU Le, XU Hao, WU Haihong, LIU Yueming, WU Peng*   

  1. Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062, China
  • Received:2012-08-31 Revised:2012-09-21 Online:2013-01-23 Published:2013-01-23

Abstract: The liquid-phase ammoximation of methyl ethyl ketone (MEK) to methyl ethyl ketone oxime (MEKO) with ammonia and hydrogen peroxide was conducted over MOR-type titanosilicate (Ti-MOR), which was prepared from highly dealuminated mordenite and TiCl4 vapor by a secondary method of gas-solid phase reaction. The effects of reaction parameters on this reaction were studied systematically in a bath-type reactor. Based on the optimized reaction conditions, Ti-MOR was further employed as the catalyst for the ammoximation of MEK to MEKO in a continuous slurry reactor. This catalyst exhibited good catalytic activity and excellent MEKO selectivity in comparison to TS-1. Moreover, in terms of ketone conversion, oxime selectivity, coke resistance, and lifetime, Ti-MOR possessed the same advantages as the Ti-MWW catalyst prepared by structural rearrangement.

Key words: Ti-MOR zeolite, Ti-MWW zeolite, titanosilicate, liquid-phase ammoximation, methyl ethyl ketone, methyl ethyl ketone oxime