Solvent scrubbing recovery of lactide and other dimeric cyclic e

Details Solvent scrubbing recovery of lactide and other dimeric cyclic e Solvent scrubbing recovery of lactide and other dimeric cyclic e

1990-10-23

1992-05-26

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31900

Patent

active

051170086

ABSTRACT:
An improved process for the recovery of lactide or other dimeric cyclic ester from a gas stream containing the cyclic ester and such hydroxylic impurities as water and open-chain hydroxycarboxylic acids by scrubbing the gas stream with a nonpolar water-immiscible solvent at a temperature at which the cyclic ester is removed from the solvent and any water present in the gas stream is vaporized from the solvent. The cyclic ester is recovered from the solvent in a high state of optical purity.

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