Process for preparing cyclic esters using a fluorocarbon

Details Process for preparing cyclic esters using a fluorocarbon Process for preparing cyclic esters using a fluorocarbon

1991-01-30

1992-02-18

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31912

Patent

active

050896326

ABSTRACT:
Process for preparing high purity solvent-free cyclic esters from alpha hydroxycarboxylic acids via an intermediate oligomer wherein a fluorocarbon or a mixture of fluorocarbons is employed to strip the ester from the oligomer as well as a refrigerant to quench lactide from a gaseous reaction stream comprising, besides cyclic ester, unconverted alpha-hydroxycarboxylic acid and water.

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