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:
Mar. 12, 2019
Filed:
Sep. 30, 2015
Basf SE, Ludwigshafen, DE;
Michael Guenter Braun, Heidelberg, DE;
Juergen Daeuwel, Heidelberg, DE;
Hans-Juergen Lang, Dudenhofen, DE;
Peter Oedman, Neustadt, DE;
Kai-Uwe Baldenius, Mannheim, DE;
Matthias Kleiner, Goennheim, DE;
Michael Kiefer, Boehl-Iggelheim, DE;
Stephan Freyer, Neustadt, DE;
Michael Budde, Ilvesheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to methods for preparing an aqueous acrylamide solution having a low acrylic acid concentration. In addition, the present invention relates to methods for reducing the acrylic acid concentration of an aqueous acrylamide solution. The methods involve a bioconversion of acrylonitrile to acrylamide in the presence of a biocatalyst, wherein during the bioconversion the content of acrylonitrile is maintained at 0.3 w/w % or more referred to the total weight of the composition in the reactor. Also provided is an aqueous acrylamide solution which is obtained by the methods of the present invention. Furthermore, the present invention is related to an acrylamide homopolymer or copolymer obtained by polymerizing the acrylamide of the aqueous solution.