公开(公告)号：US09023970B2

公开(公告)日：2015-05-05

申请号：US14046159

申请日：2013-10-04

Applicant: BASF SE

Inventor： Arno Lange ,  Matthias Kiefer ,  Matthias Kleiner ,  Szilard Csihony ,  Dietmar Posselt

IPC: C08G77/04 ,  C08G73/06 ,  C08G65/34 ,  C08G59/00 ,  C08G75/32 ,  C08G67/02 ,  C07C31/18 ,  C08F10/10

CPC classification number: C08F10/10 ,  C08F110/10 ,  C08F4/16

Abstract: Preparation of bifunctional polyisobutenes in which isobutene or an isobutene-containing monomer mixture is polymerized in the presence of a Lewis acid and a compound of the formula I in which X is an acyl radical or the radical of an organic or inorganic acid group, R1 to R4 are identical or different and are hydrogen or a hydrocarbon radical.

Abstract translation: 制备其中异丁烯或含异丁烯的单体混合物在路易斯酸和式I化合物存在下聚合的双官能聚异丁烯，其中X是酰基或有机或无机酸基团的基团，R1至 R4相同或不同，为氢或烃基。

公开(公告)号：US10227621B2

公开(公告)日：2019-03-12

申请号：US15514321

申请日：2015-09-30

Applicant: BASF SE

Inventor： Michael Guenter Braun ,  Juergen Daeuwel ,  Hans-Juergen Lang ,  Peter Oedman ,  Kai-Uwe Baldenius ,  Matthias Kleiner ,  Michael Kiefer ,  Stephan Freyer ,  Michael Budde

IPC: C12P13/02 ,  C08F20/56 ,  C07C233/09 ,  C08L33/26 ,  C09K8/588 ,  D21H17/37

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.