Removal of catalyst residues from polyesters

Details Removal of catalyst residues from polyesters Removal of catalyst residues from polyesters

1983-09-01

1985-03-19

Trousof, Natalie

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

Organic compounds

Carboxylic acid esters

203 18, 203 19, 203 38, 203 53, 2604109R, 502171, 560 1, 560 78, 560 79, 560103, 560 89, 560 94, 560106, 560107, 560108, 560121, 560122, 560123, 560124, 560191, 560193, 560194, 560204, 560265, 560218, C07C 6748, C07C 6708

Patent

active

045060916

ABSTRACT:
A process for preparing esters which comprises reacting a polycarboxylic acid with an excess of alcohol and in the presence of an organotitanate catalyst, treating the crude mixture with a suitable chelate compound, removing the unreacted alcohol and hydrolyzing the treated titanium catalyst residues with steam, and recovering the purified ester by filtration.

REFERENCES:
patent: 3056818 (1962-10-01), Werber
patent: 4216337 (1980-08-01), Baba et al.
patent: 4284793 (1981-08-01), Sagara et al.

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