公开(公告)号：KR20200125931A

公开(公告)日：2020-11-05

申请号：KR20207023872

申请日：2019-02-11

Applicant: BASF SE

Inventor： PFEIFFER THOMAS ,  WEISMANTEL MATTHIAS ,  SCHROEDER JUERGEN ,  POSSEMIERS KARL ,  KRUEGER MARCO ,  FUNK RUEDIGER

IPC: C08F6/00 ,  C08F2/10 ,  C08F2/18 ,  C08F2/44 ,  C08F220/06 ,  C08F222/10 ,  C08J3/12 ,  C08J3/24 ,  C08L33/04

Abstract: 본발명은중합체의건조, 불완전건조중합체입자의분리, 분리된중합체입자의분쇄, 분쇄된중합체입자의재순환및 재순환된중합체입자의보관을포함하는, 초흡수제입자의제조방법에관한것이다.

公开(公告)号：AT534671T

公开(公告)日：2011-12-15

申请号：AT05796468

申请日：2005-09-21

Applicant: BASF SE

Inventor： FUNK RUEDIGER ,  HILLEBRECHT ANNEMARIE ,  DE KAEY RONNY ,  VAN ESBROECK DOMINICUS ,  WEISMANTEL MATTHIAS ,  STUEVEN UWE ,  POSSEMIERS KARL

IPC: C08F2/01 ,  B01J19/00 ,  C08F2/10 ,  C08F6/10 ,  C08F220/06 ,  C08F220/56 ,  C08J3/12 ,  C08J3/24

Abstract: In the continuous preparation of finely divided, gel-form, crosslinked polymers (I) by copolymerizing water-soluble mono-ethylenically unsaturated monomers (II) with 0.001-5 mol. % (based on (II)) of monomers (III) containing at least two polymerizable groups in a kneader through which materials are transported axially, (a) the degree of filling of the kneader is at least 71%, (b) (II) contains up to 150 ppm hydroquinone hemi-ether (IV), (c) the polymerization zone temperature is more than 65[deg]C and/or (d) the kneader has back mixing ratio less than 0.33.

公开(公告)号：AT539048T

公开(公告)日：2012-01-15

申请号：AT06793087

申请日：2006-08-31

Applicant: BASF SE

Inventor： MARCO MICHAEL ,  WEISMANTEL MATTHIAS ,  POSSEMIERS KARL ,  MEES FILIP ,  DE KAEY RONNY ,  FUNK RUEDIGER

IPC: C07C51/41 ,  B01J14/00 ,  C07C57/04 ,  C08F20/06 ,  C08F220/06

Abstract: The invention relates to a neutralization process in which at least one ethylenically unsaturated carboxylic acid is preneutralized at least partly with a base, wherein the preneutralized solution is divided into at least two part-solutions and at least one part-solution is aftertreated so as to form part-solutions with different degree of neutralization and/or solids content, and also to an apparatus for carrying out the process.

公开(公告)号：DE502006005477D1

公开(公告)日：2010-01-07

申请号：DE502006005477

申请日：2006-12-28

Applicant: BASF SE

Inventor： STUEVEN UWE ,  DANIEL THOMAS ,  FUNK RUEDIGER ,  WEISMANTEL MATTHIAS ,  VAN ESBROECK DOMINICUS ,  POSSEMIERS KARL ,  HILLEBRECHT ANNEMARIE

IPC: C08F2/00 ,  C08F2/44

Abstract: Preparation of water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and optionally at least one cross-linker, comprises mixing at least a first portion of a particulate additive in the reaction mixture, before the reaction mixture reaches a retention time of 40% of the total retention time in the reactor; and mixing at least a second portion of a particulate additive in the reaction mixture, when the reaction mixture reaches a retention time of 45% or more of the total retention time in the reactor. Preparation of water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and optionally at least one cross-linker, in a reactor, comprises mixing at least a first portion of a particulate additive in the reaction mixture, before the reaction mixture reaches a retention time of 40% of the total retention time in the reactor; and mixing at least a second portion of a particulate additive in the reaction mixture, when the reaction mixture reaches a retention time of 45% or more of the total retention time in the reactor, where: the additive is a water-adsorbing resin powder and/or filler; the total solid content of the monomer and additive is 30-60 wt.%; the amount of the additive is 5-50 wt.%, based on the monomer; and the weight ratio of the first fraction to the second fraction of the additive is 10:10-1:5.

公开(公告)号：AT449793T

公开(公告)日：2009-12-15

申请号：AT06830841

申请日：2006-12-28

Applicant: BASF SE

Inventor： STUEVEN UWE ,  DANIEL THOMAS ,  FUNK RUEDIGER ,  WEISMANTEL MATTHIAS ,  VAN ESBROECK DOMINICUS ,  POSSEMIERS KARL ,  HILLEBRECHT ANNEMARIE

IPC: C08F2/00 ,  C08F2/44

Abstract: Preparation of water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and optionally at least one cross-linker, comprises mixing at least a first portion of a particulate additive in the reaction mixture, before the reaction mixture reaches a retention time of 40% of the total retention time in the reactor; and mixing at least a second portion of a particulate additive in the reaction mixture, when the reaction mixture reaches a retention time of 45% or more of the total retention time in the reactor. Preparation of water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and optionally at least one cross-linker, in a reactor, comprises mixing at least a first portion of a particulate additive in the reaction mixture, before the reaction mixture reaches a retention time of 40% of the total retention time in the reactor; and mixing at least a second portion of a particulate additive in the reaction mixture, when the reaction mixture reaches a retention time of 45% or more of the total retention time in the reactor, where: the additive is a water-adsorbing resin powder and/or filler; the total solid content of the monomer and additive is 30-60 wt.%; the amount of the additive is 5-50 wt.%, based on the monomer; and the weight ratio of the first fraction to the second fraction of the additive is 10:10-1:5.

公开(公告)号：EP3295102A1

公开(公告)日：2018-03-21

申请号：EP16717128

申请日：2016-04-15

Applicant: BASF SE

Inventor： GRÜNEWALD GERALD ,  FUNK RUEDIGER ,  WEISMANTEL MATTHIAS ,  POSSEMIERS KARL

IPC: F26B3/06 ,  C08J3/24 ,  F26B17/04 ,  F26B21/02 ,  F26B21/12

CPC classification number: F26B3/06 ,  B29B9/10 ,  B29B9/12 ,  C08F2/00 ,  C08F2/01 ,  C08F20/06 ,  F26B17/04 ,  F26B21/02 ,  F26B21/12

Abstract: The invention relates to a production method for producing water-absorbing polymer particles, wherein the production method comprises the following steps: polymerizing an aqueous monomer solution or suspension in order to produce an aqueous polymer gel, drying the aqueous polymer gel in a belt dryer having a conveyor belt, the aqueous polymer gel being accommodated on the conveyor belt and the polymer gel being conveyed on the conveyor belt in a conveying direction (C), fracturing and/or grinding the dried polymer gel in order to form water-absorbing polymer particles. According to the invention, in order to perform drying: the belt dryer is formed having a dryer structure (101) largely encompassing the conveyor belt and having an air return guide (350) that connects to the dryer structure (101) in such a way that air is returned, wherein return air (RL) is drawn from the dryer structure (101) and is fed back to the dryer structure (101) via the air return guide (350), and the air return guide (350) has an air-drawing guide (340), which is formed between an input segment (EA) at the dryer structure (101) arranged upstream in the direction of air flow and an output segment (AA) in the air return guide (350) arranged downstream in the direction of air flow,
characterized in that a flow cross-section in at least one air-removing segment (A, A1, A2, A3, A4) of the air-drawing guide (340) has a cross-section enlargement (Q, Q1, Q2, Q3, Q4), wherein the cross-section enlargement enlarges a cross-section of the air-removing segment (A, A1, A2, A3, A4) of the air-drawing guide in such a way that at least in the air-removing segment (A, A1, A2, A3, A4) of the air-drawing guide (340), the return air (RL) is led away at a reduced flow velocity, in particular at a reduced flow velocity that is lower than at a cross-section of the air-drawing line arranged upstream in the direction of air flow and/or than an input velocity at the input segment (EA), and/or at least in an input segment (EA) of the air-drawing guide (340) having an enlarged cross-section, the return air (RL) is led away at a reduced input velocity, in particular at a reduced flow velocity that is lower than at a cross-section of the air-drawing line arranged downstream in the direction of air flow.