公开(公告)号：US20190292330A1

公开(公告)日：2019-09-26

申请号：US16096515

申请日：2017-04-20

Applicant: BASF SE

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

IPC: C08J3/05 ,  C08F220/56 ,  C08F220/04 ,  B01F5/04 ,  B01F5/02 ,  B01F5/20 ,  B01F7/00

Abstract: A process for producing an aqueous polymer solution, including: (a) providing a hydrated polymer that has been prepared by aqueous solution polymerisation of ethylenically unsaturated monomers, which hydrated polymer contains at least 10% by weight active polymer; (b) cutting the hydrated polymer by subjecting the hydrated polymer to at least one cutting stage containing at least one stream of aqueous liquid at a pressure of at least 150 bar to reduce the size of the hydrated polymer; and (c) dissolving the hydrated polymer in an aqueous liquid so as to obtain an aqueous polymer solution. An apparatus for producing an aqueous polymer solution.

公开(公告)号：US20190153300A1

公开(公告)日：2019-05-23

申请号：US16096229

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: C09K8/588 ,  C08F20/56 ,  C08J3/075 ,  E21B43/16 ,  B01D21/01

Abstract: A method for preparing an aqueous polyacrylamide solution, where the method includes: 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, wherein the polyacrylamide gel is dissolved by water jet cutting.

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.