VALORISATION OF D-LACTIC ACID STREAM BY L/D SEPARATION IN THE PRODUCTION PROCESS OF L-POLYLACTIC ACID

Valorization methods herein relate to undesired by-products containing compounds including the optical isometry D, in particular D-lactic acid and D-lactic acid esters. An illustrative valorization method is disclosed wherein a flux containing undesired D-lactic acid and/or undesired D-lactic acid e...

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Bibliographische Detailangaben
Hauptverfasser:	COSZACH, Philippe, MORLOT, Julien
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	Valorization methods herein relate to undesired by-products containing compounds including the optical isometry D, in particular D-lactic acid and D-lactic acid esters. An illustrative valorization method is disclosed wherein a flux containing undesired D-lactic acid and/or undesired D-lactic acid ester(s) is subjected to a treatment in order to selectively separate a fraction rich in L-lactic acid and/or L-lactic acid ester(s) from a fraction containing D-lactic acid and/or D-lactic acid ester(s), thereby improving the efficiency of the production of L-PLA.