Catalyst for dehydrohalogenation

Details Catalyst for dehydrohalogenation Catalyst for dehydrohalogenation

C - Chemistry, Metallurgy

07

C

260/653.4

C07C 25/28 (2006.01) C07C 17/34 (1990.01)

Patent

CA 2003779

ABSTRACT A process for preparing an .alpha.-substituted styrene, such as 2-(3,5-dichlorophenyl)-4,4,4-trichloro- 1-butene, comprising reacting, in the absence of an added Lewis acid, an .alpha.-haloalkylbenzene, such as 3-(3,5- dichlorophenyl)-1,1,1,3-tetrachlorobutane, with .gamma.- alumina dried to a moisture content between zero to 12 percent by weight is described herein. The .gamma.-alumina serves to catalyze the dehydro-halogenation of the .alpha.- haloalkylbenzene to produce the .alpha.-substituted styrene. 32,980

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