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：US20180043052A1

公开(公告)日：2018-02-15

申请号：US15552849

申请日：2016-01-26

Applicant: BASF SE

Inventor： Stephan Bauer ,  Yvonne Hagen ,  Katrin Baumann ,  Christophe Bauduin ,  Thomas Daniel ,  Thomas Pfeiffer

IPC: A61L15/60 ,  B01J19/24 ,  B01J4/00 ,  C08J3/24 ,  C08F2/06 ,  C08F2/34 ,  C08F220/06 ,  B01J19/20 ,  B01J8/44

CPC classification number: A61L15/60 ,  B01J4/002 ,  B01J8/44 ,  B01J19/20 ,  B01J19/2415 ,  B01J2219/185 ,  B01J2219/1943 ,  C08F2/06 ,  C08F2/34 ,  C08F220/06 ,  C08J3/245 ,  C08J2333/02 ,  C08F2222/1013

Abstract: The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles comprising polymerizing droplets of a monomer solution, wherein water-absorbent polymer particles having an average particle diameter from 420 to 700 μm, an amount of water-absorbent polymer particles having a particle size of less than 300 μm of less than 5% by weight and an amount of water-absorbent polymer particles having a particle size of more than 800 μm of less than 5% by weight are coated with at least one surface-postcrosslinker and thermal surface-postcrosslinked.

公开(公告)号：US09550213B2

公开(公告)日：2017-01-24

申请号：US14779990

申请日：2014-03-18

Applicant: BASF SE

Inventor： Karl J. Possemiers ,  Thomas Pfeiffer ,  Matthias Weismantel ,  Rüdiger Funk ,  Monte Peterson ,  Sven Serneels ,  Jeffrey Johnson ,  Ronny De Kaey

IPC: B07B1/00 ,  B07B1/46 ,  B07B9/00 ,  C08J3/24 ,  C08L33/02 ,  A61L15/60 ,  C08F220/06 ,  C08J3/12 ,  G01N15/02

CPC classification number: B07B1/46 ,  A61L15/60 ,  B07B9/00 ,  B07B2201/04 ,  C08F220/06 ,  C08J3/12 ,  C08J3/245 ,  C08J2333/02 ,  C08L33/02 ,  G01N15/0272 ,  C08F2222/1013

Abstract: A process for classifying water-absorbing polymer particles, wherein screens having different mesh sizes are used before and after surface postcrosslinking to remove the undersize (fines).

Abstract translation: 对吸水性聚合物颗粒进行分级的方法，其中在表面后交联之前和之后使用具有不同网眼尺寸的筛网以除去小尺寸（细粒）。