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:
Aug. 11, 2015
Filed:
Jan. 17, 2013
Applicant:
Purac Biochem B.v., Gorinchem, NL;
Inventors:
Assignee:
PURAC BIOCHEM B.V., Gorinchem, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/48 (2006.01); C07C 51/41 (2006.01);
U.S. Cl.
CPC ...
C07C 51/48 (2013.01); C07C 51/412 (2013.01);
Abstract
A process for removing free carboxylic acid from an aqueous solution including a mass fraction of less than 1% wt of the free carboxylic acid. The process includes the steps of: (a) contacting the aqueous solution with a depleted solvent including a polyamine extractant to obtain an extract enriched in free carboxylic acid and a raffinate having a reduced free carboxylic acid content; and (b) separating the raffinate from the extract, wherein the polyamine extractant is a compound containing at least two nitrogen atoms, and at least one double bond between a nitrogen atom and a carbon atom.