Process for rapid conversion of oligomers to cyclic esters

Details Process for rapid conversion of oligomers to cyclic esters Process for rapid conversion of oligomers to cyclic esters

1990-09-21

1992-02-25

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31910

Patent

active

050915444

ABSTRACT:
A gas-assisted process for the rapid conversion of oligomers of alpha-hydroxycarboxylic acids, esters or nitrogen salts thereof to cyclic esters in high yields and high states of purity. An inert gas is intimately contacted with the oligomer so as to create a large interfacial area. The large interfacial area permits removal of the cyclic ester substantially as fast as the cyclic ester is formed.

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