Extracting agents for poly-D(-)-3-hydroxybutyric acid

US4968611A · kind A · utility

Assignee

• Petrochemie Danubia Gesellschaft m.b.H. · AT

Inventors

• Heinz Traussnig · Frohnleiten, AT
• Engelbert Kloimstein · Eferding, AT
• Hans Kroath · Linz, AT
• Robert Estermann · Linz, AT

Key dates

• Filing date: Jun 22, 1989
• Grant date: Nov 6, 1990
• Expiry date: Jun 22, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/90
• WIPO field: Biotechnology
• WIPO sector: Chemistry

Abstract

Use of diols or acetalized triols, di- or tricarboxylic acid esters, mixtures of dicarboxylic acid esters or butyrolactone as extracting agents for obtaining pure polyesters or copolyesters containing 3-hydroxybutyric acid units.