Process for the continuous isolation of dihydric phenols

Details Process for the continuous isolation of dihydric phenols Process for the continuous isolation of dihydric phenols

1976-04-08

1980-10-21

Lone, Werren B.

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

Organic compounds

Oxygen containing

C07C 3708

Patent

active

042295963

ABSTRACT:
Dihydric phenols produced by rearrangement of p-dialkylbenzene hydroperoxides are recovered from the rearrangement effluent by distilling byproduct ketone in a distillation tower from a mixture of the rearrangement effluent with benzene and dihydric phenol-containing aqueous feed and extracting impurities and aromatic byproducts with benzene. Benzene containing dissolved impurities and aromatic byproducts, and water containing the dihydric phenol are removed from the bottom of the distillation tower and separated in an extractor column, the dihydric phenol is recovered from its aqueous solution by crystallization and the mother liquor from the crystallization step is recycled to the distillation tower.

REFERENCES:
patent: 2597497 (1952-05-01), Joris
patent: 2989566 (1961-06-01), Young
patent: 3376352 (1968-04-01), Domenicalio et al.

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