Postcrosslining of Water Absorbing Polymers With Cyclic Carbamates and/or Cyclic Ureas
    2.
    发明申请
    Postcrosslining of Water Absorbing Polymers With Cyclic Carbamates and/or Cyclic Ureas 有权
    具有循环氨基甲酸酯和/或环状尿素的吸水性聚合物的交联

    公开(公告)号:US20080171837A1

    公开(公告)日:2008-07-17

    申请号:US11630949

    申请日:2005-07-28

    IPC分类号: C08G69/48

    CPC分类号: A61L15/60

    摘要: Disclosed is a process for postcrosslinking a water absorbing polymer by the polymer being treated with at least one postcrosslinker and postcrosslinked and dried during or after the treatment by raising the temperature, the at least one postcrosslinker being a cyclic carbamate or a cyclic urea, wherein the cyclic carbamate or the cyclic urea was obtained by reacting respectively an aminoalcohol or a diamine with a cyclic carbonate.

    摘要翻译: 公开了一种通过用至少一种后交联剂处理的聚合物后交联吸水聚合物的方法,并且在处理期间或之后通过升高温度进行后交联和干燥,所述至少一种后交联剂是环状氨基甲酸酯或环脲,其中 通过使氨基醇或二胺与环状碳酸酯反应,得到环状氨基甲酸酯或环状脲。

    Method for the secondary crosslinking of hydrogels with bicyclic amide acetals
    3.
    发明授权
    Method for the secondary crosslinking of hydrogels with bicyclic amide acetals 失效
    水凝胶与双环酰胺缩醛二次交联的方法

    公开(公告)号:US07754822B2

    公开(公告)日:2010-07-13

    申请号:US10565050

    申请日:2004-07-07

    IPC分类号: C08F8/32

    摘要: A process for postcrosslinking a water-absorbing polymer comprises said polymer being treated with a postcrosslinker and, during or after said treating, being postcrosslinked and dried by temperature elevation, said postcrosslinker being a compound of the formula I where R1, R2, R3, R4, R5, R6, R7, R8 and R9 are each independently hydrogen, C1-C12-alkyl, C2-C12-alkenyl or C6-C12-aryl, wherein C1-C12-alkyl, C2-C12-alkenyl or C6-C12-aryl may be halogen substituted. The liquid-absorbing polymers are useful in hygiene articles and packaging materials.

    摘要翻译: 用于后吸附聚合物的方法包括用后交联剂处理的所述聚合物,并且在所述处理期间或之后,通过温度升高进行后交联和干燥,所述后交联剂是式I的化合物,其中R 1,R 2,R 3,R 4 ,R 5,R 6,R 7,R 8和R 9各自独立地为氢,C 1 -C 12 - 烷基,C 2 -C 12 - 烯基或C 6 -C 12 - 芳基,其中C 1 -C 12 - 烷基,C 2 -C 12 - 烯基或C 6 -C 12 - 芳基可以是卤素取代的。 液体吸收聚合物可用于卫生制品和包装材料。

    Postcrosslinking of water absorbing polymers with cyclic carbamates and/or cyclic ureas
    5.
    发明授权
    Postcrosslinking of water absorbing polymers with cyclic carbamates and/or cyclic ureas 有权
    吸水聚合物与环状氨基甲酸酯和/或环脲的后交联

    公开(公告)号:US07655733B2

    公开(公告)日:2010-02-02

    申请号:US11630949

    申请日:2005-07-28

    IPC分类号: C08F8/30 C08B37/00

    CPC分类号: A61L15/60

    摘要: Disclosed is a process for postcrosslinking a water absorbing polymer by the polymer being treated with at least one postcrosslinker and postcrosslinked and dried during or after the treatment by raising the temperature, the at least one postcrosslinker being a cyclic carbamate or a cyclic urea, wherein the cyclic carbamate or the cyclic urea was obtained by reacting respectively an aminoalcohol or a diamine with a cyclic carbonate.

    摘要翻译: 公开了一种通过用至少一种后交联剂处理的聚合物后交联吸水聚合物的方法,并且在处理期间或之后通过升高温度进行后交联和干燥,所述至少一种后交联剂是环状氨基甲酸酯或环脲,其中 通过使氨基醇或二胺与环状碳酸酯反应,得到环状氨基甲酸酯或环状脲。

    METHOD FOR PRODUCING VITAMIN A ACETATE
    9.
    发明申请
    METHOD FOR PRODUCING VITAMIN A ACETATE 审中-公开
    维生素A的制备方法

    公开(公告)号:US20090043121A1

    公开(公告)日:2009-02-12

    申请号:US12255460

    申请日:2008-10-21

    IPC分类号: C07C69/612

    CPC分类号: C07C403/12 C07C2601/16

    摘要: The present invention relates to a process for preparing vitamin A acetate by reacting β-vinylionol with triphenylphosphine in the presence of sulfuric acid in a solvent mixture consisting of 60 to 80% by weight methanol, 10 to 20% by weight water and 10 to 20% by weight aliphatic, cyclic or aromatic hydrocarbons having 5 to 8 carbon atoms to give β-ionylideneethyltriphenylphosphonium salts and subsequent Wittig reaction with 4-acetoxy-2-methylbut-2-enal.

    摘要翻译: 本发明涉及一种制备维生素A乙酸酯的方法,该方法是在硫酸存在下,使β-乙烯醇与三苯膦反应,在60至80%(重量)甲醇,10至20%(重量)水和10至20份 重量%的具有5至8个碳原子的脂族,环状或芳族烃,得到β-离子亚乙基三苯基鏻盐,随后与4-乙酰氧基-2-甲基丁-2-烯的维t希反应。

    Method for producing maleic anhydride
    10.
    发明授权
    Method for producing maleic anhydride 失效
    马来酸酐生产方法

    公开(公告)号:US06989454B2

    公开(公告)日:2006-01-24

    申请号:US10485200

    申请日:2002-07-17

    IPC分类号: C07D307/36

    CPC分类号: C07D307/60

    摘要: A process for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of an n-butene-containing hydrocarbon stream by means of oxygen-containing gases in a shell-and-tube reactor having two successive reaction zones, where the first, feed-side reaction zone contains at least one catalyst which is suitable for the oxydehydrogenation of n-butenes to 1,3-butadiene and the second, product-side reaction zone contains at least one catalyst which is suitable for the oxidation of 1,3-butadiene to maleic anhydride, is carried out using a shell-and-tube reactor which has at least one heat transfer medium circuit in the region of the first, feed-side reaction zone and at least one further heat transfer medium circuit in the region of the second, product-side reaction zone.

    摘要翻译: 在具有两个连续反应区域的管壳式反应器中,通过含氧气体异构催化气相氧化含正丁烯的烃物流来制备马来酸酐的方法,其中第一个进料侧 反应区含有至少一种适用于正丁烯氧化脱氢至1,3-丁二烯的催化剂,第二产物侧反应区含有至少一种适用于1,3-丁二烯氧化的催化剂 马来酸酐使用壳管式反应器进行,该管式反应器在第一进料侧反应区域中具有至少一个传热介质回路,并且在第二进料侧反应区域中至少一个另外的传热介质回路 ,产品侧反应区。