Process for preparing a bisphenol

Details Process for preparing a bisphenol Process for preparing a bisphenol

1990-07-31

1991-10-22

Lone, Werren B.

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

Organic compounds

Oxygen containing

568727, C07C 3720, C07C 3770, C07C 3914

Patent

active

050597213

ABSTRACT:
In a process for the preparation of a bisphenol by condensation of a phenolic compound and a carbonyl compound in the presence of an acidic ion exchange resin catalyst, strong acids that leach from the acidic ion exchange resin catalyst into the reaction effluent are scavenged by a carbon adsorbent. The acid scavenging improves the product quality and yield by reducing acid catalyzed cracking of bisphenols during purification and finishing steps.

REFERENCES:
patent: 4160110 (1979-07-01), Carnahan, Jr.
patent: 4169211 (1979-09-01), Ligorati et al.
patent: 4396728 (1983-08-01), Faler
patent: 4469561 (1984-09-01), Sikdar et al.
patent: 4533764 (1985-08-01), Chang et al.
patent: 4766254 (1988-08-01), Faler et al.
patent: 4847433 (1989-07-01), Kissinger
patent: 4906789 (1990-03-01), Grzywa

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