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Organic Solvent‐Free Process for Cyclohexanone Ammoximation by a Ceramic Membrane Distributor
Author(s) -
Mao Honglin,
Chen Rizhi,
Xing Weihong,
Jin Wanqin
Publication year - 2016
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201500641
Subject(s) - cyclohexanone , cyclohexanone oxime , chemical engineering , ceramic membrane , chemistry , selectivity , membrane , ceramic , solvent , hydrogen peroxide , catalysis , materials science , organic chemistry , biochemistry , engineering
Abstract Cyclohexanone ammoximation with cyclohexanone, ammonia gas, and hydrogen peroxide over titanium silicalites‐1 catalysts requires a large amount of tert ‐butanol as solvent, which needs to be recycled in industry and increases the separation costs. A novel organic solvent‐free process for cyclohexanone ammoximation was developed, in which a porous ceramic membrane distributor was introduced to the reactor and used for the micro‐scale distribution of H 2 O 2 . Plenty of tiny H 2 O 2 drops were produced with the membrane distributor to strengthen the mixing between water phase and organic phase in the cyclohexanone ammoximation without organic solvents, resulting in enhanced oxime selectivity. The membrane operating and reaction conditions were optimized, and the ceramic membrane exhibited excellent thermal and chemical stability.