Patent · US Active

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

US9850224B2 · kind B2 · utility

1Cited by

0References

5Claims

0Family size

Assignee

Futerro S.A. · BE

Inventors

Christian Penu · Saint-Saulve, FR
Benjamine Belloncle · Onnaing, FR

Key dates

Filing date	Dec 9, 2014
Grant date	Dec 26, 2017
Priority date	—
Expiry date	Dec 9, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D167/04
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.