The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2016
Filed:
Nov. 25, 2013
Martin Schilling, Bonn, DE;
Marius Ruetering, Meschede, DE;
Verena Dahl, Cologne, DE;
Fabien Cabirol, Essen, DE;
Martin Schilling, Bonn, DE;
Marius Ruetering, Meschede, DE;
Verena Dahl, Cologne, DE;
Fabien Cabirol, Essen, DE;
EVONIK DEGUSSA GMBH, Essen, DE;
Abstract
A process for isolating rhamnolipids is provided. The process includes providing an aqueous medium containing at least one rhamnolipid and having a pH of less than 6. Next, the aqueous medium is brought into contact with at least one organic solvent to provide a multiphase system and then the aqueous phase is separated off. The pH is then increased to a value of 6 or more to provide a multiphase organic system. Next, a rhamnolipid-enriched organic phase is separated off. An optional step of further purifying the rhamnolipid may be performed.