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    Cooling neutralized acrylic acid by means of an absorption chiller
    1.
    发明公开
    Cooling neutralized acrylic acid by means of an absorption chiller 有权
    KühlungneutralisierterAcrylsäure手套吸收器

    公开(公告)号：EP2615119A1

    公开(公告)日：2013-07-17

    申请号：EP12150870.9

    申请日：2012-01-12

    申请人： Evonik Degussa GmbH

    发明人： Vorholt, Herbert ,  Rudolph, Henry ,  van Stiphoudt, Manfred ,  Reimann, Armin ,  Jung, Detlef ,  Beerhorst, Martin ,  Grupe, Heinz-Peter ,  Becker, Volker

    IPC分类号： C08F6/00 ,  A61L15/22 ,  A61L15/60 ,  C08F8/44 ,  C08J3/00 ,  C08L33/02 ,  F25B15/02

    CPC分类号： A61L15/60 ,  A61L15/24 ,  C08F6/008 ,  C08F220/06 ,  C08J3/075 ,  C08J2333/02 ,  C08L33/02 ,  F25B15/06 ,  Y10T428/254

    摘要： The invention relates generally to a process for the preparation of water-absorbent polymer particles, comprising the process steps of
    (i) preparing an aqueous monomer solution comprising at least partially neutralized, monoethylenically unsaturated monomers bearing carboxylic acid groups (α1) and at least one crosslinker (α3);
    (ii) optionally adding fine particles of a water-absorbent polymer to the aqueous monomer solution;
    (iii) adding a polymerization initiator or a at least one component of a polymerization initiator system that comprises two or more components to the aqueous monomer solution;
    (iv) decreasing the oxygen content of the aqueous monomer solution;
    (v) charging the aqueous monomer solution into a polymerization reactor;
    (vi) polymerizing the monomers in the aqueous monomer solution in the polymerization reactor;
    (vii) discharging the polymer gel strand out of the polymerization reactor and optionally comminuting the polymer gel thereby obtaining polymer gel particles;
    (viii) drying the polymer gel particles;
    (ix) grinding the dried polymer gel particles thereby obtaining particulate water-absorbent polymer particles;
    (x) sizing the grinded water-absorbent polymer particles; and
    (xi) treating the surface of the grinded and sized water-absorbent polymer particles;

    wherein in process step (i) the preparation of the aqueous monomer solution comprises the step of:
    (ia) at least partially neutralizing acrylic acid by mixing acrylic acid with an aqueous solution of sodium hydroxide, thereby obtaining an aqueous solution of the at least partially neutralized acrylic acid;
    (ib) cooling the aqueous solution of the at least partially neutralized acrylic acid with a cooling liquid in a heat exchanger (2), wherein the cooling liquid used in the heat exchanger has been cooled in an absorption chiller (3) in which at least a part of the heat of the heated cooling liquid obtained in the heat exchanger (2) is consumed by the evaporation of a refrigerant liquid in a vacuum that is created by the absorption of a refrigerant vapour into an absorbent.
    The invention also relates to water-absorbent polymer particles obtainable by such a process, to a composite material, to a process for the preparation of a composite material, to the composite material obtainable by such a process, to chemical products and to the use of the water-absorbent polymer particles or a composite material.

    摘要翻译： 本发明一般涉及制备吸水性聚合物颗粒的方法，其包括以下工艺步骤：（i）制备包含至少部分中和的带有羧酸基团（±1）的至少部分中和的单烯属不饱和单体和至少 一个交联剂（±3）; （ii）任选地向单体水溶液中加入吸水性聚合物微粒; （iii）向单体水溶液中加入聚合引发剂或至少一种包含两种或多种组分的聚合引发剂体系的组分; （iv）降低单体水溶液的氧含量; （v）将单体水溶液装入聚合反应器中; （vi）在聚合反应器中使单体在单体水溶液中聚合; （vii）将聚合物凝胶线排出聚合反应器，并任选地粉碎聚合物凝胶，从而获得聚合物凝胶颗粒; （viii）干燥聚合物凝胶颗粒; （ix）研磨干燥的聚合物凝胶颗粒，从而获得颗粒状吸水聚合物颗粒; （x）调整研磨的吸水性聚合物颗粒的尺寸; 和（xi）处理研磨和尺寸的吸水性聚合物颗粒的表面; 其中在方法步骤（i）中，单体水溶液的制备包括以下步骤：（ia）通过将丙烯酸与氢氧化钠水溶液混合来至少部分中和丙烯酸，从而获得至少部分地 中和的丙烯酸; （ib）在热交换器（2）中用冷却液将所述至少部分中和的丙烯酸的水溶液冷却，其中在热交换器中使用的冷却液体已经在吸收式制冷机（3）中冷却，其中至少 在热交换器（2）中获得的加热的冷却液体的热量的一部分被制冷剂液体在通过将制冷剂蒸气吸收到吸收剂中而产生的真空中的蒸发而被消耗。 本发明还涉及通过这种方法获得的吸水性聚合物颗粒，复合材料，复合材料的制备方法，可通过这种方法获得的复合材料，化学产品和使用 吸水性聚合物颗粒或复合材料。

    Process for the continuous preparation of water-absorbent polymers
    4.
    发明公开
    Process for the continuous preparation of water-absorbent polymers 有权
    福尔法罕zur kontinuierlichen Herstellung von wasserabsorbierenden Polymeren

    公开(公告)号：EP2615120A1

    公开(公告)日：2013-07-17

    申请号：EP12150875.8

    申请日：2012-01-12

    申请人： Evonik Degussa GmbH

    发明人： Vorholt, Herbert ,  Rudolph, Henry ,  Reimann, Armin ,  Becker, Volker ,  Jung, Detlef ,  van Stiphoudt, Manfred

    IPC分类号： C08F6/00 ,  A61L15/22 ,  A61L15/60 ,  C08J3/24 ,  C08L33/02 ,  F26B3/20

    摘要： The invention relates generally to a process for the preparation of water-absorbent polymer particles, comprising the process steps of
    (i) preparing an aqueous monomer solution comprising at least partially neutralized, monoethylenically unsaturated monomers bearing carboxylic acid groups (α1) and at least one crosslinker (α3);
    (ii) optionally adding fine particles of a water-absorbent polymer to the aqueous monomer solution;
    (iii) adding a polymerization initiator or a at least one component of a polymerization initiator system that comprises two or more components to the aqueous monomer solution;
    (iv) decreasing the oxygen content of the aqueous monomer solution;
    (v) charging the aqueous monomer solution into a polymerization reactor;
    (vi) polymerizing the monomers in the aqueous monomer solution in the polymerization reactor;
    (vii) discharging the polymer gel strand out of the polymerization reactor and optionally comminuting the polymer gel thereby obtaining polymer gel particles;
    (viii) drying the polymer gel particles;
    (ix) grinding the dried polymer gel particles thereby obtaining particulate water-absorbent polymer particles;
    (x) sizing the grinded water-absorbent polymer particles; and
    (xi) treating the surface of the grinded and sized water-absorbent polymer particles;
    wherein in process step (viii) the gel particles obtained in process step (vii) are charged onto the surface of the belt material of a belt dryer at a position L 0 and are subsequently dried on their way through the belt dryer and wherein the belt material has been cooled before coming into contact with the gel particles.

    The invention also relates to water-absorbent polymer particles obtainable by such a process, to a composite material, to a process for the preparation of a composite material, to the composite material obtainable by such a process, to chemical products and to the use of the water-absorbent polymer particles or a composite material.

    摘要翻译： 本发明一般涉及制备吸水性聚合物颗粒的方法，其包括以下工艺步骤：（i）制备包含至少部分中和的带有羧酸基团（±1）的至少部分中和的单烯属不饱和单体和至少 一个交联剂（±3）; （ii）任选地向单体水溶液中加入吸水性聚合物微粒; （iii）向单体水溶液中加入聚合引发剂或至少一种包含两种或多种组分的聚合引发剂体系的组分; （iv）降低单体水溶液的氧含量; （v）将单体水溶液装入聚合反应器中; （vi）在聚合反应器中使单体在单体水溶液中聚合; （vii）将聚合物凝胶线排出聚合反应器，并任选地粉碎聚合物凝胶，从而获得聚合物凝胶颗粒; （viii）干燥聚合物凝胶颗粒; （ix）研磨干燥的聚合物凝胶颗粒，从而获得颗粒状吸水聚合物颗粒; （x）调整研磨的吸水性聚合物颗粒的尺寸; 和（xi）处理研磨和尺寸的吸水性聚合物颗粒的表面; 其中在工艺步骤（viii）中，将工艺步骤（vii）中获得的凝胶颗粒装入位于L 0的带式干燥器的带材料的表面上，随后在穿过带式干燥器的方式上干燥，其中带 材料在与凝胶颗粒接触之前已被冷却。 本发明还涉及通过这种方法获得的吸水性聚合物颗粒，复合材料，复合材料的制备方法，可通过这种方法获得的复合材料，化学产品和使用 吸水性聚合物颗粒或复合材料。