Purification of diphenyl phthalates

Details Purification of diphenyl phthalates Purification of diphenyl phthalates

1987-08-11

1988-07-26

Lone, Werren B.

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

Organic compounds

Carboxylic acid esters

560 86, 203 14, 203 88, C07C 6748

Patent

active

047601663

ABSTRACT:
Color properties of crude phenolic esters of aromatic dicarboxylic acids are improved by comminuting the ester to a finely divided particle size in the presence of an aqueous or alcoholic alkali solution and thereafter distilling the esters to obtain phenolic esters of reduced color.

REFERENCES:
patent: 2197546 (1940-04-01), Baxter et al.
patent: 2780643 (1957-02-01), Buchner et al.
patent: 3597470 (1971-08-01), Witt et al.
patent: 3705186 (1972-12-01), Naskar et al.
patent: 4118582 (1978-10-01), Walker
patent: 4349688 (1982-09-01), Sandler

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