期刊
APPLIED CATALYSIS A-GENERAL
卷 488, 期 -, 页码 86-95出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2014.09.038
关键词
Dimethyl ketone; Dimethyl ketone oxime; Titanosilicate; Ti-MOR; Liquid-phase ammoximation
资金
- National Natural Science Foundation of China [21373089, U1162102]
- PhD Programs Foundation of Ministry of Education [2012007613000]
- National Key Technology RD Program [2012BAE05B02]
- Shanghai Leading Academic Discipline Project [B409]
Titanosilicate with the MOR topology (Ti-MOR), postsynthesized from highly dealuminated mordenite and TiCl4 vapor through a solid-gas reaction, was highly active and selective for the liquid-phase ammoximation of dimethyl ketone (DMK) with ammonia and hydrogen peroxide. The parameters effecting the formation of the ammoximation product of dimethyl ketone oxime were investigated systematically in a batch-type reactor, and the optimized conditions were further applied to continuous ammoximation of DMK in a slurry reactor. Ti-MOR was superior to other titanosilicates in terms of activity and lifetime. TS-1 was not suitable for the ammoximation of DMK, whereas Ti-MWW required a higher catalyst loading to reach a reasonable activity, and they both easily produced a main byproduct of oxidative coupling of dimethyl ketone oxime. The deactivation behavior of Ti-MOR was investigated. Ammonia-induced structural desilication and accompanied Ti sites migration altered a more serious influence on the catalyst duration than coke deposition during continuous ammoximation. (C) 2014 Elsevier B.V. All rights reserved.
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