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. 08, 1989
Filed:
Feb. 01, 1985
Applicant:
Inventors:
Gabriella Margureanu, Weinheim, DE;
Friedrich Gutmann, Walldorf, DE;
Assignee:
Joh. A. Benckiser GmbH, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562580 ; 562584 ; 435144 ;
Abstract
A process for producing citric acid or other suitable acids and/or their salts from fermentation solutions. The process comprises removing high molecular weight impurities by means of membrane filtration and/or addition adsorption on a nonionic adsorption resin and removing low molecular weight impurities by anion and cation exchange and/or precipitating a citric acid as a calcium salt.