公开(公告)号：US12220686B2

公开(公告)日：2025-02-11

申请号：US17289287

申请日：2019-11-04

Applicant: BASF SE

Inventor： Monte Alan Peterson ,  Ronny De Kaey ,  Karl Possemiers ,  Juergen Schroeder ,  Ruediger Funk ,  Matthias Weismantel

IPC: C08F120/06 ,  B01J19/00 ,  B01J19/24 ,  B01J20/26 ,  B01J20/28 ,  B01J20/30

Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, wherein the monomer solution comprises partly neutralized acrylic acid formed by continuous mixing of acrylic acid and an aqueous solution of a base, the apparatus for preparing the partly neutralized acrylic acid comprises a vessel (B), and the feed line to vessel (B) ends inside vessel (B) below the liquid Level of the partly neutralized acrylic acid.

公开(公告)号：US11680142B2

公开(公告)日：2023-06-20

申请号：US16628689

申请日：2018-07-06

Applicant: BASF SE

Inventor： Ruediger Funk ,  Thomas Pfeiffer ,  Matthias Weismantel ,  Monte Alan Peterson ,  Karl Possemiers ,  Ronny De Kaey

IPC: C08J3/12 ,  B07B1/46 ,  C08J3/075 ,  C08J3/24

CPC classification number: C08J3/12 ,  B07B1/46 ,  C08J3/075 ,  C08J3/245 ,  C08J2300/12 ,  C08J2300/14 ,  C08J2333/08

Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising surface postcrosslinking, classifying the surface postcrosslinked superabsorbent polymer particles, deagglomerating the separated oversize fraction using a roll crusher and recycling the disintegrated oversize fraction before or into the classification of the surface postcrosslinked superabsorbent polymer particles.

公开(公告)号：US20220185924A1

公开(公告)日：2022-06-16

申请号：US17432135

申请日：2020-02-21

Applicant: BASF SE

Inventor： Monte Alan Peterson ,  Ruediger Funk ,  Matthias Weismantel ,  Juergen Schroeder

IPC: C08F220/06 ,  A61L15/60 ,  B02C4/02 ,  B02C4/28 ,  B02C4/40 ,  C08F2/06 ,  B01J20/28 ,  B01J20/26 ,  B01J20/30

Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, drying the resulting polymer gel and grinding the dried polymer gel with a roll mill, wherein the rolls of the roll mill are cleaned by reducing the feed rate to the roll mill, and if the deflection and/or the power consumption increases above a setpoint, operating the roll mill with reduced feed, and increasing the feed rate to the roll mill.

公开(公告)号：US20210402373A1

公开(公告)日：2021-12-30

申请号：US17289302

申请日：2019-11-04

Applicant: BASF SE

Inventor： Monte Alan Peterson ,  Ronny De Kaey ,  Karl Possemiers ,  Juergen Schroeder ,  Ruediger Funk ,  Matthias Weismantel

IPC: B01J20/30 ,  B01J20/26 ,  B01J19/00 ,  B01J19/24

Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, wherein the monomer solution comprises partly neutralized acrylic acid formed by continuous mixing of acrylic acid and an aqueous solution of a base, the apparatus for preparing the partly neutralized acrylic acid comprises a vessel (B), and the vessel (B) has a cylindrical shape and a torispherical bottom.