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    2.
    发明专利
    未知

    公开(公告)号：DE102005042604A1

    公开(公告)日：2007-03-08

    申请号：DE102005042604

    申请日：2005-09-07

    Applicant: BASF AG

    Inventor： WEISMANTEL MATTHIAS ,  MARCO MICHAEL DE ,  ESBROECK DOMINICUS VAN ,  POSSEMIERS KARL J ,  KAEY RONNY DE

    IPC: C07C51/41 ,  B01F5/10

    Abstract: Neutralization procedure comprises partially neutralizing at least an ethylenically unsaturated carboxylic acid compound with a base, where the neutralization takes place in a continuous process and the neutralized solution is at less than 70[deg]C. Independent claims are included for: (1) a procedure for production of water-absorbing polymer comprising a neutralization procedure; and (2) a device for continuous neutralization comprising a circular pipe (R), at least a first supply pipe (Z 1) and second supply pipe (Z 2) in the circular pipe, at least a heat exchanger (W 1) in the circular pipe, where the heat exchanger flows directly behind the supply pipes, at least a conduit (A), which flows directly behind the heat exchanger, a pump (P) and optionally a container (B) between the heat exchanger and the conduit.

    4.
    发明专利
    未知

    公开(公告)号：DE102005042605A1

    公开(公告)日：2007-03-08

    申请号：DE102005042605

    申请日：2005-09-07

    Applicant: BASF AG

    Inventor： WEISMANTEL MATTHIAS ,  CLAESSENS LOUIS ,  POSSEMIERS KARL J ,  KAEY RONNY DE

    IPC: C07C51/41 ,  B01F5/10

    Abstract: The invention relates to a neutralization process in which at least one ethylenically unsaturated carboxylic acid is neutralized at least partly with a base and at least one stream of the neutralization is determined continuously, and also to an apparatus for carrying out the process.

    Preparation of water-absorbing resin, useful in sanitary articles e.g. diapers, comprises polymerizing a reaction mixture comprising hydrophilic monomer and cross-linker
    6.
    发明专利
    Preparation of water-absorbing resin, useful in sanitary articles e.g. diapers, comprises polymerizing a reaction mixture comprising hydrophilic monomer and cross-linker 未知

    公开(公告)号：DE102005062929A1

    公开(公告)日：2007-07-05

    申请号：DE102005062929

    申请日：2005-12-29

    Applicant: BASF AG

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

    IPC: C08F2/44 ,  C08F220/06 ,  C08F283/06 ,  C08J3/075

    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.

    8.
    发明专利
    未知

    公开(公告)号：DE102005042607A1

    公开(公告)日：2007-03-08

    申请号：DE102005042607

    申请日：2005-09-07

    Applicant: BASF AG

    Inventor： WEISMANTEL MATTHIAS ,  FUNK RUEDIGER ,  ESBROECK DOMINICUS VAN ,  POSSEMIERS KARL J ,  KAEY RONNY DE ,  MIERT LEO VAN

    IPC: C08F2/04 ,  C08F2/01 ,  C08F20/06

    Abstract: The invention relates to a process for preparing water-absorbing polymer particles, comprising the inertization of monomer solutions, wherein the monomer solution, based on the dissolved monomer, comprises from 0.001 to 0.016% by weight of at least one polymerization inhibitor and at least 50% by volume of the inert gas used to inertize the monomer solution is transferred into the polymerization reactor together with the inertized monomer solution, and also to apparatus for performing the process.

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