公开(公告)号：US20190144574A1

公开(公告)日：2019-05-16

申请号：US16096169

申请日：2017-04-25

Applicant: BASF SE

Inventor： Hazel SPRAFKE ,  Faissal-Ali EL-TOUFAILI ,  Bjoern LANGLOTZ ,  John BARRATT ,  Tobias BRINGMANN ,  Gabriela Eugenia FONSECA ZEPEDA ,  Sandra JECK ,  Dennis LOESCH ,  Dirk MECKELNBURG ,  Markus OSTERMAYR ,  Bernd SCHUBE ,  Oliver SOETJE

IPC: C08F20/56 ,  C08F2/10 ,  C08F2/01 ,  C08F6/06

Abstract: A method for preparing an aqueous polyacrylamide solution is disclosed. The method comprises:—hydrating acrylonitrile in water in presence of a biocatalyst capable of converting acrylonitrile to acrylamide so as to obtain an acrylamide solution,—directly polymerizing the acrylamide solution so as to obtain a polyacrylamide gel, and—directly dissolving the polyacrylamide gel by addition of water so as to obtain an aqueous polyacrylamide solution.