PRODUCTION OF LACTIC ESTER

1. A process for the preparation of an optically pure alkyl D- or L-lactate by reaction of calcium lactate, prepared by fermentation, with an alcohol in the presence of a strong acid, wherein the crude fermentation mixture is filtered while hot, the calcium lactate is isolated as a solid from the fi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KASUPAA BOTSUTO, KURISUTOFU MARUCHIN, HARUDOO JIIGERU, WARUTAA BEEMU, GERUHARUTO FURITSUTSU
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS BEER BIOCHEMISTRY CHEMISTRY ENZYMOLOGY FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE METALLURGY MICROBIOLOGY MUTATION OR GENETIC ENGINEERING ORGANIC CHEMISTRY SPIRITS VINEGAR WINE
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Beschreibung
Zusammenfassung:	1. A process for the preparation of an optically pure alkyl D- or L-lactate by reaction of calcium lactate, prepared by fermentation, with an alcohol in the presence of a strong acid, wherein the crude fermentation mixture is filtered while hot, the calcium lactate is isolated as a solid from the filtrate by spray drying and is reacted with an alcohol in the presence of an acid which forms a readily water-soluble calcium salt, the water present in the reaction mixture or formed during the esterification is separated off by azeotropic distillation with the aid of an entraining agent, and the lactic acid ester is isolated from the reation mixture in a conventional manner.