Preparation and use of substituted bisphenols

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

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568727, 568728, C07C 3916

Patent

active

046833455

ABSTRACT:
Process of preparation of a bisphenol by the condensation of a phenol carrying a halogen substituent and alkyl groups with an aldehyde in a solvent for the phenol, in the presence of sulphuric acid; the proportion of acid with respect to the phenol is such that after the condensation and absorption by the acid of the water eliminated, the acid contains less than 50% of water by weight.

REFERENCES:
patent: 1977627 (1934-10-01), Greenhalgh
patent: 3426081 (1969-02-01), Shore et al.
patent: 3674879 (1972-07-01), Tiefenthal et al.
patent: 4535191 (1985-08-01), Mark et al.

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