Purification of bisphenol-A

Details Purification of bisphenol-A Purification of bisphenol-A

1982-11-24

1984-05-08

Hart, Charles N.

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

Organic compounds

Oxygen containing

210634, C07C 258

Patent

active

044476558

ABSTRACT:
An efficient method of purifying bisphenol-A is presented whereby solvent washing of the bisphenol-A crystals and extraction of impurities, bisphenol-A and phenol from the aqueous liquid of a water/bisphenol-A crystal slurry is accomplished simultaneously and in a continuous operation. The method involves contacting the water/bisphenol-A crystals with an organic washing solvent in a continuous, multi-stage, countercurrent extraction column.

REFERENCES:
patent: 4182921 (1980-01-01), Borgardt et al.
patent: 4192955 (1980-03-01), Reinitz
patent: 4212997 (1980-06-01), Adams et al.
patent: 4294993 (1981-10-01), Li
patent: 4374283 (1983-02-01), Aneja

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