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

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

1977-12-23

1980-02-12

Morgenstern, Norman

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

Organic compounds

Oxygen containing

568724, 568728, C07C 3744, C07C 3724

Patent

active

041884965

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 treating the resulting mixture with anhydrous hydrogen bromide to isomerize those by-products isomerizable to bisphenol-A for subsequent recovery.

REFERENCES:
patent: 3073868 (1963-01-01), Prahl et al.
patent: 3221061 (1965-11-01), Grover et al.
patent: 3290390 (1966-12-01), Prahl et al.
patent: 3290391 (1966-12-01), Prahl et al.
patent: 3326986 (1967-06-01), Dugan et al.
patent: 3673262 (1972-06-01), Prahl et al.
patent: 3919330 (1975-11-01), Kwantis et al.
patent: 3972950 (1976-08-01), Kwantis
Hirt et al., "Chem. Ab.", 67:53879h (1967).
Kunoshimo Chemical Ltd., "Chem. Ab.", 66:38331; (1967).

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