Process for the preparation of bisphenol-A

Details Process for the preparation of bisphenol-A Process for the preparation of bisphenol-A

1976-09-27

1977-10-04

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603455, C07C 3720, C07C 3700, C07C 3916

Patent

active

040524663

ABSTRACT:
The use of certain dihydric phenols, alkyl ethers thereof, and alkyl-substituted monohydric phenols, as promoters in the acid catalyzed condensation of phenol and acetone to form Bisphenol-A enables said reaction to be carried out more rapidly, at significantly lower temperatures in some instances, with greater selectivity, i.e. reduction in proportion of undesired by-product, and most significantly, with the use of only catalytic amounts of mineral acid (instead of the large quantity in the conventional process) or the use of the inexpensive solid catalysts, such as acidic clays, which due to their low catalytic ability, are not useful as sole catalyst for this condensation if the promoter is not present. The promoters are readily recoverable for re-use.

REFERENCES:
patent: 2433143 (1947-12-01), Mohrman
patent: 2480533 (1949-08-01), Winnek
patent: 2540633 (1951-02-01), Rourk

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