公开(公告)号：US20200283588A1

公开(公告)日：2020-09-10

申请号：US16649793

申请日：2018-10-09

Applicant: BASF SE

Inventor： Oskar Stephan ,  Gerald Gruenewald ,  Matthias Weismantel ,  Karl Possemiers ,  Monte Alan Peterson ,  Ruediger Funk ,  Sylvia Bertha ,  Tom Catternan

IPC: C08J5/02

Abstract: A process for producing superabsorbents, comprising the steps of i) classifying the superabsorbent particles by means of one or more sieves and ii) removing metallic impurities by means of one or more magnetic separators, wherein classification is accomplished using sieves made of a wire mesh, the wires of the wire mesh consist of a steel composed of at least 70% by weight of iron, at least 10% by weight of chromium and less than 2.5% by weight of nickel, and the throughput of superabsorbent particles in the magnetic separator is in the range from 2.0 to 6.5 g/s per cm2 of free cross-sectional area.

公开(公告)号：US20130260032A1

公开(公告)日：2013-10-03

申请号：US13848879

申请日：2013-03-22

Applicant: BASF SE

Inventor： Holger Barthel ,  Gerald Gruenewald ,  Norbert Herfert ,  Markus Muehl ,  Birgit Reinhard

IPC: B01J20/32

CPC classification number: B01J20/3225 ,  B01J20/267 ,  B01J20/3078 ,  B01J2220/68 ,  C08J3/243 ,  C08J3/245 ,  C08J2333/02

Abstract: A process for thermal surface postcrosslinking of water-absorbing polymer particles, wherein the polymer particles are coated with an aqueous solution, the coated polymer particles are deagglomerated and the deagglomerated polymer particles are thermally surface postcrosslinked by means of a drum heat exchanger with an inverse screw helix.

Abstract translation: 一种用于吸水聚合物颗粒的热表面后交联的方法，其中聚合物颗粒用水溶液涂覆，涂覆的聚合物颗粒被解聚并且解聚聚合物颗粒通过具有反螺杆的滚筒式热交换器进行热表面后交联 螺旋。

公开(公告)号：US11535719B2

公开(公告)日：2022-12-27

申请号：US16649793

申请日：2018-10-09

Applicant: BASF SE

Inventor： Oskar Stephan ,  Gerald Gruenewald ,  Matthias Weismantel ,  Karl Possemiers ,  Monte Alan Peterson ,  Ruediger Funk ,  Sylvia Bertha ,  Tom Catternan

IPC: C08F20/06 ,  A61L15/60 ,  C08J5/02

Abstract: A process for producing superabsorbents, comprising the steps of i) classifying the superabsorbent particles by means of one or more sieves and ii) removing metallic impurities by means of one or more magnetic separators, wherein classification is accomplished using sieves made of a wire mesh, the wires of the wire mesh consist of a steel composed of at least 70% by weight of iron, at least 10% by weight of chromium and less than 2.5% by weight of nickel, and the throughput of superabsorbent particles in the magnetic separator is in the range from 2.0 to 6.5 g/s per cm2 of free cross-sectional area.

公开(公告)号：US10683371B2

公开(公告)日：2020-06-16

申请号：US15773591

申请日：2016-11-15

Applicant: BASF SE

Inventor： Marco Krueger ,  Karl Possemiers ,  Gerald Gruenewald ,  Juergen Freiberg ,  Markus Muehl

IPC: C08F2/01 ,  B01J4/00 ,  C08F2/34 ,  B01J19/24 ,  B01J2/16 ,  B01J8/24 ,  C08F2/12 ,  C08F2/14 ,  C08F20/14

Abstract: The invention relates to an apparatus for producing pulverulent poly(meth)acrylate, comprising a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the preparation of the poly(meth)acrylate having holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point on the circumference of the reactor, a fluidized bed and an apparatus for product discharge from the fluidized bed. The apparatus for product discharge comprises a discharge apparatus, with a backup segment (39) disposed above the discharge apparatus.

公开(公告)号：US20180319906A1

公开(公告)日：2018-11-08

申请号：US15773591

申请日：2016-11-15

Applicant: BASF SE

Inventor： Marco Kruger ,  Karl Possemiers ,  Gerald Gruenewald ,  Juergen Freiberg ,  Markus Muehl

IPC: C08F2/01 ,  C08F2/12 ,  C08F20/14 ,  B01J2/16 ,  B01J19/24 ,  B01J4/00

CPC classification number: C08F2/01 ,  B01J2/16 ,  B01J4/002 ,  B01J19/24 ,  B01J19/2405 ,  B01J2219/00414 ,  B01J2219/0072 ,  B01J2219/185 ,  C08F2/12 ,  C08F2/34 ,  C08F20/14

Abstract: The invention relates to an apparatus for producing pulverulent poly(meth)acrylate, comprising a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the preparation of the poly(meth)acrylate having holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point on the circumference of the reactor, a fluidized bed and an apparatus for product discharge from the fluidized bed. The apparatus for product discharge comprises a discharge apparatus, with a backup segment (39) disposed above the discharge apparatus.