Process for the preparation of pure 4,4'-dihydroxyphenyl alkanes

Details Process for the preparation of pure 4,4'-dihydroxyphenyl alkanes Process for the preparation of pure 4,4'-dihydroxyphenyl alkanes

1981-07-20

1983-06-07

Lone, Werren B.

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

Organic compounds

Oxygen containing

568728, C07C 3916

Patent

active

043872514

ABSTRACT:
A process for the preparation of bisphenols, which comprises condensing an aliphatic or cycloaliphatic ketone with a phenol having a free p-position in the presence, as a condensing agent, of from 0.3 to 3 mols, per mol of ketone, of an aromatic sulphonic acid of the formula (III) or (IV): ##STR1## wherein R.sup.3 is an inert organic radical,

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patent: 2468982 (1949-05-01), Jansen
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patent: 2775620 (1956-12-01), Williamson
patent: 2807653 (1957-09-01), Filbey
patent: 2923744 (1960-02-01), Scriabine et al.
patent: 3207794 (1965-09-01), Haines et al.
patent: 3919052 (1982-03-01), Styskin et al.
patent: 3919053 (1982-03-01), Heuser et al.
patent: 3920573 (1975-11-01), Vegter et al.

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