Oxidative process for preparing substituted biphenols

Details Oxidative process for preparing substituted biphenols Oxidative process for preparing substituted biphenols

C - Chemistry, Metallurgy

07

C

260/617

C07C 39/15 (2006.01) C07C 37/11 (2006.01)

Patent

CA 1137518

12,034 OXIDATIVE PROCESS FOR PREPARING SUBSTITUTED BIPHENOLS Abstract Of The Disclosure An oxidative process for preparing 4,4'-bis(2,6-di- hydrocarbylphenols) is provided which comprises contacting with good agitation a disubstituted phenol such as 2,6-di-tertiary- butyl phenol with up to stoichiometric amounts of oxygen in the presence of a small catalytic quantity of a catalyst selected from the group consisting of alkali metal and alkaline earth metal hydroxides, alkali metal and alkaline earth metal salts of a weak acid, amine bases, and mixtures of the same at a temperature from about 50° to 240°C. until a reaction product containing a substantial amount of the corresponding biphenol is formed, said reaction product being substantially free of quinones. S P E C I F I C A T I O N

338024

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