Process for preparing 2,2-bis(4-hydroxy-phenyl) propane from dis

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

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568724, 568728, C07C 3744, C07C 3724

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active

041929543

ABSTRACT:
A process is disclosed for the production of 2,2-bis(4-hydroxyphenyl) propane, herein referred to as bisphenol-A, from by-products remaining after purification distillation of bisphenol-A produced from a condensation reaction of phenol and acetone. The process comprises mixing the by-products with phenol and adding anhydrous hydrogen chloride under superatmospheric pressure to the resulting mixture to isomerize those by-products isomerizable to bisphenol-A for subsequent recovery.

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patent: 3919330 (1975-11-01), Kwantes et al.
patent: 3972950 (1976-08-01), Kwantes
Hert et al., "C.A.", 67: 53879h, (1967).
Kunoshimo Chemical, Ltd., "C.A.", 66:38331, (1967).

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