Co-vaporization process for preparing lactide

Details Co-vaporization process for preparing lactide Co-vaporization process for preparing lactide

1991-06-24

1993-03-23

Chan, Nicky

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31900

Patent

active

051965518

ABSTRACT:
A distillation process for converting lactic acid oligomer to lactide wherein the oligomer is depolymerized in the presence of a co-vaporizable solvent at a temperature and pressure which forms a vapor fraction comprising water, lactide, lactic acid and solvent, and the vapor fraction is condensed and the lactide is recovered from the condensate.

REFERENCES:
patent: 1095205 (1914-05-01), Gruter et al.
patent: 2668163 (1954-02-01), Lowe
patent: 4727163 (1988-02-01), Bellis
patent: 4835293 (1989-05-01), Bhatia
patent: 5023349 (1991-06-01), Bhatia

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