Process for preparation of asymmetrical bisphenols

Details Process for preparation of asymmetrical bisphenols Process for preparation of asymmetrical bisphenols

1983-03-03

1984-07-17

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568722, C07C 3916

Patent

active

044607989

ABSTRACT:
Asymmetrical bisphenols such as 2-(3-hydroxyphenyl)-2-(4-hydroxyphenyl)propane are prepared by an improved process wherein a hydroxyphenyldialkylcarbinol is reacted with a phenol in the presence of a hydrogen halide catalyst. According to the improved process, the carbinol is added to a mixture of the phenol and hydrogen halide under conditions maintaining a low carbinol concentration in the reaction mixture. This low concentration is preferably maintained by adding the carbinol in the form of a solution in a portion of the phenol.

REFERENCES:
patent: 2597717 (1952-05-01), Faith
patent: 4239918 (1980-12-01), Keeley
Kammer et al., "Chemical Abstracts", vol. 55, 14369-14377, (1961).

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