Process for preparing conjugated diene butyl

Details Process for preparing conjugated diene butyl Process for preparing conjugated diene butyl

C - Chemistry, Metallurgy

08

C

402/459

C08C 19/00 (2006.01) C08F 8/26 (2006.01) C08F 210/12 (2006.01)

Patent

CA 1066849

ABSTRACT OF THE DISCLOSURE Improved processes for the dehydrohalogenation of halogenated butyl rubber in order to prepare a butyl rubber having randomly distributed sites of conjugated unsaturation are disclosed. Such processes, which include the contacting of a solution of halogenated butyl rubber with a soluble metal carboxylate, a soluble carboxylic acid, and an oxide or hydroxide of a metal selected from Groups Ia and IIa of the Periodic Table, are carried out in a reaction zone which is maintained substantially free of free water vapor. Preferabley, excess amounts of hydrophilic reagents are added to the reaction zone or is the alternative the reaction zone is purged with a drying gas.

234537

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