Patent · US Expired

Process for the biotechnical production of rhamnolipids including rhamnolipids with only one .beta.-hydroxydecanoic acid residue in the molecule

US4814272A · kind A · utility

19Cited by

0References

8Claims

0Family size

Assignee

Wintershall Holding GmbH · DE

Inventors

Fritz Wagner · Kronach, DE
Christoph Syldatk · Hildesheim, DE
Uwe Matulowic · Braunschweig, DE
Hans-Jurgen Hofmann · Vechta, DE
Kai-Udo Sewe · Barnstorf, DE
Walter Lindorfer · Kassel, DE

Key dates

Filing date	Feb 15, 1985
Grant date	Mar 21, 1989
Priority date	—
Expiry date	Feb 15, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S435/874
WIPO fieldBiotechnology
WIPO sectorChemistry

Abstract

Rhamnolipids with high surface activity are produced micro iologically in high yield per g of dry cell substance using Pseudomonas spec. DSM 2874 in the form of growing, resting and immobilized cell mass in an aqueous medium containing at least one assimilable carbon source at a pH of 6.7 to 7.3 and a temperature of 30.degree. to 37.degree. C. Two new rhamnolipids with only one .beta.-hydroxydecanoic acid residue in the molecule and defined as .alpha.-L-rhamnopyranosyl- and 2-O-.alpha.-L-rhamnopyranosyl-.alpha.-L-rhamnopyranosyl-.beta.-hydroxydeca noic acid with a molecular weight of 334 and 480, respectively, are obtained.

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