Production of meso-lactide, D-lactide, and L-lactide by back biting of polylactide

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United States of America Patent

PATENT NO 9850224
SERIAL NO

15102825

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Abstract

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Process for increasingly producing D-Lactide and meso lactide by depolymerizing by back biting polylactide (PLA) said process which comprises: (i) Depolymerizing polylactide into its corresponding dimeric cyclic esters by heating the polylactide in the presence of a catalyst system comprising a catalyst and a co-catalyst in a reaction zone at temperature and pressure at which the polylactide is molten; (ii) Forming a vapor product stream from the reaction zone; (iii) Removing the vapor product stream and optionally condense it; (iv) Recovering, either together or separately meso-lactide, D-lactide and L-lactide.

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Patent Owner(s)

Patent OwnerAddress
FUTERRO S A7760 ESCANAFFLES

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Belloncle, Benjamine Onnaing, FR 2 2
Penu, Christian Saint Saulve, FR 4 2

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