PRODUCTION OF MESO-LACTIDE, D-LACTIDE AND L-LACTIDE BY BACK BITING OF POLYLACTIDE

USPTO Patent Application US 2018/0057476 A1
Application Date: Mar. 1st, 2018

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...
Application Number:
15/804,874
International Classification:
C07D 319/12 (20060101); B01J 27/24 (20060101); B01J 31/02 (20060101); B01J 31/04 (20060101); B01J 31/26 (20060101); C08G 18/42 (20060101); B01J 23/02 (20060101); C04B 16/06 (20060101); C09D 167/04 (20060101)
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CLAIMS

What is claimed is:

1. 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 which comprises a catalyst and a co-catalyst, the catalyst of general...

DESCRIPTION

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This patent application is a continuation U.S. patent application Ser. No. 15/102,825, filed Jun. 8, 2016, which is a national stage entry under 35 U.S.C. §371 of PCT/EP2014/077077, filed Dec. 9, 2014, which claims the benefit of European Application No. 13196418.1, filed Dec. 10, 2013 the entire teachings and disclosures...
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