-
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
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.
-
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
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：US20210154652A1
公开(公告)日：2021-05-27
申请号：US17056753
申请日：2019-05-17
Applicant: BASF SE
Inventor： Marco Oskar KENNEMA , Christian WALSDORFF , Fred BORNINKHOF , Matthias Johannes WAGNER , Bernd SCHUBE , Jochen ROERIG , Gerald BASTIAN , Sabine HUBER , Marcelo Daniel KAUFMAN RECHULSKI
Abstract: The invention relates to a die (10) for the extrusion of catalyst molding, catalyst support molding, or adsorbent molding (60) in flow direction (32) of an extrudable composition from an entry side (12) to a discharge side (14) of the die comprising a shell (56) and comprising one or more channel-formers (18) which are displacers of the extrudable composition and which extend in flow direction of the extrudable composition, wherein the channel-formers (18) have been metal-printed.
It is preferable that this is free from cavities for receiving extrudable composition which extend at right angles to the flow direction (32) of the extrudable composition, and that this is free from connections running at right angles from channel-formers (18) to the interior side wall (22) of the die (10).
The invention further relates to a process for the production, by means of 3D metal printing, of a metal-printed die (10) for the extrusion of catalyst moldings/support moldings (60).-
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.
-
-
-
Search Results
4
records
(took 0.036 seconds)
