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    PROCESS FOR PRODUCTION OF WATER-ABSORBABLE RESIN
    4.
    发明公开
    PROCESS FOR PRODUCTION OF WATER-ABSORBABLE RESIN 有权
    生产吸水树脂的方法

    公开(公告)号：EP2471848A1

    公开(公告)日：2012-07-04

    申请号：EP10812059.3

    申请日：2010-08-30

    申请人： Nippon Shokubai Co., Ltd.

    发明人： MATSUMOTO, Koji ,  NOGI, Kozo ,  FUJINO, Shinichi ,  DAIROKU, Yorimichi ,  ISHIZAKI, Kunihiko

    IPC分类号： C08J3/24 ,  C08J3/12

    CPC分类号： C08J3/12 ,  C08J3/245 ,  C08J2300/14 ,  C08J2333/02

    摘要： [PROBLEM]
    It is an object of the present invention to efficiently obtain efficiently a water-absorbent resin having excellent property.
    [SOLUTION]
    A production method for a water-absorbent resin, comprising: a polymerization step for obtaining hydrogel by subjecting a monomer aqueous solution to a polymerization reaction; and a drying step for drying the hydrogel; wherein drying in the drying step is performed using a continuous through-flow belt-type drying machine; solid content of the hydrogel supplied to the drying step is 35% by weight or more, and thickness variation rate (1) represented by the following EXPRESSION 1 of the hydrogel loaded onto through-flow belt in the continuous through-flow belt, is 1.05 to 5: EXPRESSION 1 Thickness variation rate 1 = Maximum thickness of hydrogel in a width direction of the through - flow belt / Average thickness of hydrogel in a width direction of the through - flow belt .

    摘要翻译： 发明内容本发明的目的在于有效地高效率地得到性能优异的吸水性树脂。 用于吸水性树脂的生产方法，其包括：用于通过使单体水溶液进行聚合反应来获得水凝胶的聚合步骤; 和用于干燥水凝胶的干燥步骤; 其中干燥步骤中的干燥使用连续通流带式干燥机进行; 向干燥工序供给的水凝胶的固体成分为35重量％以上，在连续流通带上装载在通流带上的水凝胶的下述表达式1所示的厚度变化率（1）为1.05 至5：表达式1厚度变化率1 =在通流带的宽度方向上的水凝胶的最大厚度/在通流带的宽度方向上的水凝胶的平均厚度。

    WATER-ABSORBENT RESIN MANUFACTURING METHOD AND LIQUID PERMEABILITY IMPROVEMENT METHOD
    5.
    发明公开
    WATER-ABSORBENT RESIN MANUFACTURING METHOD AND LIQUID PERMEABILITY IMPROVEMENT METHOD 有权
    用于生产吸水和方法，从而加快液体传动

    公开(公告)号：EP2338918A1

    公开(公告)日：2011-06-29

    申请号：EP09814539.4

    申请日：2009-09-11

    申请人： Nippon Shokubai Co., Ltd.

    发明人： DAIROKU, Yorimichi ,  NOGI, Kozo ,  KANZAKI, Syuji ,  ISHIZAKI, Kunihiko ,  MATSUMOTO, Koji ,  MITSUKAMI, Yoshiro

    IPC分类号： C08F6/00 ,  C08F8/00 ,  C08F20/06

    CPC分类号： C08F20/06 ,  C08F6/003 ,  C08F6/02 ,  C08F220/06 ,  C08J3/245 ,  C08J2300/14 ,  C08J2333/02 ,  C08L33/02

    摘要： A method for the production of a water-absorbing resin is to be provided which permits enhancement and stabilization of property, for example, liquid permeability, of a water-absorbing resin by a simple and convenient method without requiring change of raw materials or expensive facility investment. The method comprises a polymerization step for polymerizing an aqueous solution of acrylic acid (or salt thereof) to obtain a hydrogel cross-linked polymer; a drying step for drying the hydrogel cross-linked polymer to obtain a water-absorbing resin powder; a classification step for classifying the water-absorbing resin powder; and a surface cross-linking step for surface cross-linking the water-absorbing resin powder before or after the classification step, wherein electricity is eliminated in the classification step.

    摘要翻译： 一种用于生产吸水性树脂的方法是通过简单和方便的方法来提供，其允许增强和财产稳定，例如，液体渗透性，吸水树脂，而不需要原料或昂贵的设备的变化 投资。 该方法包括在丙烯酸（或其盐）的溶液wässrige聚合得到的水凝胶交联聚合物的聚合工序; 用于干燥所述水凝胶交联聚合物，得到吸水性树脂粉末的干燥工序; 为吸水性树脂粉末分级的分级工序; 和用于表面交联的吸水性树脂粉末之前或分级工序后，worin电的表面交联工序在分类步骤被消除。

    PROCESS FOR PRODUCTION OF WATER-ABSORBABLE RESIN
    6.
    发明授权
    PROCESS FOR PRODUCTION OF WATER-ABSORBABLE RESIN 有权

    公开(公告)号：EP2471848B2

    公开(公告)日：2017-11-29

    申请号：EP10812059.3

    申请日：2010-08-30

    申请人： Nippon Shokubai Co., Ltd.

    发明人： MATSUMOTO, Koji ,  NOGI, Kozo ,  FUJINO, Shinichi ,  DAIROKU, Yorimichi ,  ISHIZAKI, Kunihiko

    IPC分类号： C08J3/24 ,  C08J3/12 ,  A61L15/00

    CPC分类号： C08J3/12 ,  C08J3/245 ,  C08J2300/14 ,  C08J2333/02

    摘要： [PROBLEM] It is an object of the present invention to efficiently obtain efficiently a water-absorbent resin having excellent property. [SOLUTION] A production method for a water-absorbent resin, comprising: a polymerization step for obtaining hydrogel by subjecting a monomer aqueous solution to a polymerization reaction; and a drying step for drying the hydrogel; wherein drying in the drying step is performed using a continuous through-flow belt-type drying machine; solid content of the hydrogel supplied to the drying step is 35% by weight or more, and thickness variation rate (1) represented by the following EXPRESSION 1 of the hydrogel loaded onto through-flow belt in the continuous through-flow belt, is 1.05 to 5: EXPRESSION 1 Thickness variation rate 1 = Maximum thickness of hydrogel in a width direction of the through - flow belt / Average thickness of hydrogel in a width direction of the through - flow belt .

    SUCCINIC ANHYDRIDE, PROCESS FOR PREPARATION OF THE SAME AND USE THEREOF
    10.
    发明公开
    SUCCINIC ANHYDRIDE, PROCESS FOR PREPARATION OF THE SAME AND USE THEREOF 审中-公开
    BERNSTEINSÄUREANHYDRID，VERFAHREN ZU DESSEN HERSTELLUNG UND DESSEN VERWENDUNG

    公开(公告)号：EP1435354A1

    公开(公告)日：2004-07-07

    申请号：EP02800787.0

    申请日：2002-10-08

    申请人： Nippon Shokubai Co., Ltd.

    发明人： ITO, Rie ,  SASAKI, Masamitsu ,  SHIROSHIMA, Masahiro ,  KAKIMOTO, Yukihiko ,  MATSUMOTO, Koji

    IPC分类号： C07D307/60 ,  C08G63/78

    CPC分类号： C07D307/60 ,  C08G63/16

    摘要： An object of the present invention is to provide: succinic anhydride that little becomes colored in a melted state; a production process for such succinic anhydride; and a production process for a polyester, by which there can be obtained a polyester of an extremely reduced color. As means of achieving such an object, the succinic anhydride is characterized by having a γ-butyrolactone content of not more than 800 ppm and a dilactone content of not more than 500 ppm. The production process for the succinic anhydride is characterized in that: the hydrogenation reaction is carried out in the presence of a catalyst in the temperature range of 120 to 160 °C under a hydrogen pressure of 0.1 to 2.0 MPa; and the distillation is carried out in such a manner that the bottom temperature will be within the temperature range of 125 to 200 °C by reducing the pressure. The production process for the polyester is characterized in that the aforementioned succinic anhydride is used as an acid component.

    摘要翻译： 本发明的目的是提供：在熔融状态下几乎不着色的琥珀酸酐; 这种琥珀酸酐的生产方法; 以及聚酯的制造方法，通过该方法可以获得极度降低的颜色的聚酯。 作为实现这一目的的手段，琥珀酸酐的特征在于γ-丁内酯含量不超过800ppm，二烯内酯含量不大于500ppm。 琥珀酸酐的制造方法的特征在于：氢化反应在催化剂存在下，在120〜160℃，氢压为0.1〜2.0MPa的条件下进行; 通过降低压力使底部温度在125〜200℃的温度范围内进行蒸馏。 聚酯的制造方法的特征在于使用上述琥珀酸酐作为酸成分。