公开(公告)号：US20220089789A1

公开(公告)日：2022-03-24

申请号：US17422466

申请日：2020-01-13

Applicant: BASF SE

Inventor： Rene Callot ,  Karl Possemiers ,  Ruediger Funk ,  Marco Krueger ,  Matthias Weismantel ,  Juergen Schroeder

IPC: C08F2/18 ,  C08F2/04 ,  C08F20/04 ,  C08F6/00 ,  B01J20/26 ,  F26B17/04 ,  F26B17/02 ,  B01J20/285 ,  A61F13/53

Abstract: A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising drying of the resultant aqueous polymer gel in an air circulation belt dryer, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt dryer by means of an oscillating conveyor belt and that guide devices are located at the edges of the conveyor belt.

公开(公告)号：US12084527B2

公开(公告)日：2024-09-10

申请号：US16968192

申请日：2019-02-11

Applicant: BASF SE

Inventor： Thomas Pfeiffer ,  Matthias Weismantel ,  Jürgen Schröder ,  Karl Possemiers ,  Marco Krueger ,  Ruediger Funk

IPC: A61L15/60 ,  C08F2/10 ,  C08F2/18 ,  C08F6/00 ,  C08J3/12 ,  C08J3/24

CPC classification number: C08F2/18 ,  A61L15/60 ,  C08F2/10 ,  C08F6/008 ,  C08J3/12 ,  C08J3/245 ,  C08J2300/14 ,  C08J2333/02

Abstract: A process for producing superabsorbent particles, comprising drying of a polymer gel, removal of incompletely dried polymer particles, comminution of the polymer particles removed, recycling of the comminuted polymer particles and storage of the recycled polymer particles.

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：US20210338882A1

公开(公告)日：2021-11-04

申请号：US17272364

申请日：2019-09-17

Applicant: BASF SE

Inventor： Rene Callot ,  Ruediger Funk ,  Marco Krueger ,  Thomas Pfeiffer ,  Karl Possemiers ,  Juergen Schroeder ,  Matthias Weismantel

IPC: A61L15/60 ,  B01J20/26 ,  C08J3/24 ,  B08B1/00 ,  B08B1/02 ,  C08F220/06

Abstract: A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising drying of the resultant aqueous polymer gel in an air circulation belt drier, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt drier by means of an oscillating conveyor belt, the underside of the revolving conveyor belt is freed of adhering polymer gel by means of at least one stripper device, and the underside of the revolving conveyor belt is sprayed with water.

公开(公告)号：US20210154637A1

公开(公告)日：2021-05-27

申请号：US17264093

申请日：2019-08-09

Applicant: BASF SE

Inventor： Thomas Pfeiffer ,  Ruediger Funk ,  Marco Krueger ,  Karl Possemiers ,  Juergen Schroeder ,  Matthias Weismantel

IPC: B01J13/00 ,  A61L15/60 ,  C08F2/01 ,  C08F2/16

Abstract: A process for producing superabsorbent particles by polymerizing a monomer solution, comprising the steps of continuously polymerizing the monomer solution on the continuous belt of a belt reactor, comminuting the polymer gel obtained, rinsing the polymer gel obtained on the underside of the belt reactor into a separation unit with water, separating the polymer gel from the water in the separation unit and recycling the polymer gel into the comminution, wherein the polymer gel has a swelling capacity in water of at least 100 g/g, the dwell time of the polymer gel in the rinse water is less than 40 minutes, and the separation unit has openings with a clear width of at least 1 mm.

公开(公告)号：US20190255514A1

公开(公告)日：2019-08-22

申请号：US16344046

申请日：2017-10-16

Applicant: BASF SE

Inventor： Dieter Hermeling ,  Rüdiger Funk ,  Matthias Weismantel ,  Monte Alan Peterson ,  Peter Leunis ,  Karl Possemiers

IPC: B01J20/28 ,  B01J20/26 ,  B65G65/30

Abstract: Filling process for superabsorbent polymer particles The invention relates to a filling process for superabsorbent polymer particles, comprising discharging the superabsorbent polymer particles out of a silo into bulk container for shipping, wherein the filling level of the silo during filling of the bulk container is never less than 20%, in order to avoid particle segregation.

公开(公告)号：US20180326392A1

公开(公告)日：2018-11-15

申请号：US15774620

申请日：2016-11-16

Applicant: BASF SE

Inventor： Marco Krüger ,  Karl Possemiers ,  Rudolf Schliwa ,  Robert Bayer

IPC: B01J19/24 ,  B01J19/06 ,  B01J8/18 ,  B01J8/22 ,  B01J8/00 ,  C08F120/14

CPC classification number: B01J19/245 ,  B01J4/002 ,  B01J8/0055 ,  B01J8/1818 ,  B01J8/22 ,  B01J19/06 ,  B01J19/24 ,  B01J2208/00761 ,  B01J2219/185 ,  C08F120/14

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 and a fluidized bed, the reactor comprising a reactor shell between the apparatus for dropletization and the gas withdrawal point and having, above the fluidized bed, a region having decreasing hydraulic diameter toward the fluidized bed and having a maximum hydraulic diameter greater than the mean hydraulic diameter of the reactor shell, and the reactor shell projecting into the region having decreasing hydraulic diameter, so as to form an annular duct between the outer wall of the reactor shell and the wall by which the region having decreasing hydraulic diameter is bounded, and the at least one gas withdrawal point being disposed in the annular duct, wherein the ratio of the horizontal area of the annular duct to the horizontal area enclosed by the reactor shell is in the range from 0.3 to 5.

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：US12059504B2

公开(公告)日：2024-08-13

申请号：US17272364

申请日：2019-09-17

Applicant: BASF SE

Inventor： Rene Callot ,  Ruediger Funk ,  Marco Krueger ,  Thomas Pfeiffer ,  Karl Possemiers ,  Juergen Schroeder ,  Matthias Weismantel

IPC: C08F220/06 ,  A61L15/60 ,  B01J20/26 ,  B08B1/02 ,  B08B1/16 ,  B08B1/20 ,  C08F6/00 ,  C08J3/24

CPC classification number: A61L15/60 ,  B01J20/261 ,  B08B1/165 ,  B08B1/20 ,  C08F220/06 ,  C08J3/245 ,  B01J2220/68 ,  C08F6/008

Abstract: A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising drying of the resultant aqueous polymer gel in an air circulation belt drier, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt drier by means of an oscillating conveyor belt, the underside of the revolving conveyor belt is freed of adhering polymer gel by means of at least one stripper device, and the underside of the revolving conveyor belt is sprayed with water.

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.