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    Isocyanate prepolymers, a process for their preparation and their use
    1.
    发明授权
    Isocyanate prepolymers, a process for their preparation and their use 失效
    异氰酸酯预聚物，其制备方法及其应用

    公开(公告)号：US5574124A

    公开(公告)日：1996-11-12

    申请号：US510887

    申请日：1995-08-03

    申请人： Lutz Schmalstieg ,  Rainer Rettig ,  Ulrich Walter ,  Edwin R. Hortelano

    发明人： Lutz Schmalstieg ,  Rainer Rettig ,  Ulrich Walter ,  Edwin R. Hortelano

    IPC分类号： C08G18/10 ,  C08G18/12 ,  C08G18/40 ,  C08G18/44 ,  C09D175/00 ,  C09D175/04 ,  C09K3/10 ,  C08G18/42 ,  C07C269/02 ,  C08G18/48

    CPC分类号： C09K3/1021 ,  C08G18/12 ,  C08G18/4018 ,  C08G18/44 ,  C08G2190/00

    摘要： Isocyanate prepolymers having an NCO content of 1.5 to 5.0 wt. % and a monomeric diisocyanate content of less than 0.5 wt. % which are the reaction products ofA) aromatic or cycloaliphatic diisocyanates withB) mixtures ofB1) polyether polyols having a molecular weight of 1000 to 3000 andB2) polyester carbonate diols having a molecular weight of 700 to 3000,wherein components B1) and B2) are present in a weight ratio of 0.25:1 to 1.5:1;a process for the preparation of these isocyanate prepolymers by reacting the preceding starting materials at an NCO/OH equivalent ratio of at least 1.5:1 and optionally with subsequent removing unreacted monomeric diisocyanate by distillation; and the use of these isocyanate prepolymers as binders for sealing or coating compositions.

    摘要翻译： NCO含量为1.5〜5.0重量％的异氰酸酯预聚物 ％，单体二异氰酸酯含量小于0.5wt。 ％，其为A）芳族或脂环族二异氰酸酯与B）B1）分子量为1000〜3000的聚醚多元醇和B2的混合物的反应产物）分子量为700〜3000的聚酯碳酸酯二醇，其中组分B1）和 B2）以0.25:1至1.5:1的重量比存在; 通过使前述原料以至少1.5:1的NCO / OH当量比反应制备这些异氰酸酯预聚物的方法，任选地随后通过蒸馏除去未反应的单体二异氰酸酯; 以及这些异氰酸酯预聚物作为粘合剂用于密封或涂布组合物的用途。

    METHOD AND SYSTEM FOR CONCENTRATING WASTE SULPHURIC ACIDS FROM NITRATION PROCESSES
    6.
    发明申请
    METHOD AND SYSTEM FOR CONCENTRATING WASTE SULPHURIC ACIDS FROM NITRATION PROCESSES 有权
    从硝化过程中浓缩废硫酸的方法和系统

    公开(公告)号：US20100233069A1

    公开(公告)日：2010-09-16

    申请号：US12305902

    申请日：2007-06-20

    申请人： Ulrich Walter ,  Gottfried Dichtl

    发明人： Ulrich Walter ,  Gottfried Dichtl

    IPC分类号： C01B17/82 ,  B01D3/40

    CPC分类号： C01B17/94 ,  B01D3/148 ,  B01D3/40

    摘要： Disclosed is a method for recovering diluted waste sulfuric acid containing impurities from nitration processes, a highly concentrated nitric acid required in the nitration process being produced in association with the nitration process by means of extractive rectification with concentrated sulfuric acid which is re-concentrated in order to be reutilized. According to the inventive method, the waste sulfuric acid from the nitration process is fed to the top of a first, indirectly heated stripping column, optionally together with another waste sulfuric acid in the form of a DNT washing acid, and is divided into an overhead product containing nitric acid and nitro-organic compounds as well as a prepurified sulfuric acid in the bottom product. The prepurified sulfuric acid withdrawn from the bottom of the first stripping column is fed to the top of a second, serially connected additional indirectly heated stripping column, into the bottom zone of which another waste sulfuric acid is fed in the form of a diluted sulfuric acid recovered from the nitric acid concentration system such that the prepurified sulfuric acid from the first stripping column is further purified in the second stripping column and is preconcentrated along with the diluted sulfuric acid recovered from the extractive rectification of nitric acid.

    摘要翻译： 公开了一种从硝化过程中回收稀释的含有杂质的废硫酸的方法，硝化过程中所需的高浓度硝酸是通过与浓硫酸进行萃取精馏相结合的硝化过程制备的，该浓硫酸按顺序重新浓缩 被重新利用。 根据本发明的方法，将来自硝化过程的废硫酸进料到第一间接加热的汽提塔的顶部，任选地与另一种DNT洗涤酸形式的废硫酸一起分配成塔顶 含有硝酸和硝基有机化合物的产品以及底部产物中的预硫化硫酸。 将从第一汽提塔底部排出的预纯化硫酸进料到第二个连续连续的另外间接加热的汽提塔的顶部，进入其中另一个废硫酸以稀硫酸的形式进料的底部区域 从硝酸浓缩系统回收，使得来自第一汽提塔的预纯化硫酸在第二汽提塔中进一步纯化，并与从硝酸萃取精馏中回收的稀硫酸一起预浓缩。

    Derivatives of cyclic guanosine-3',5'-monophosphorothioate
    9.
    发明授权
    Derivatives of cyclic guanosine-3',5'-monophosphorothioate 失效
    环鸟苷-3'，5'-单磷酸硫酸酯的衍生物

    公开(公告)号：US5625056A

    公开(公告)日：1997-04-29

    申请号：US511664

    申请日：1995-08-07

    申请人： Hans-Gottfried Genieser ,  Ulrich Walter ,  Elke Butt

    发明人： Hans-Gottfried Genieser ,  Ulrich Walter ,  Elke Butt

    IPC分类号： C07H19/20 ,  C07H19/213

    CPC分类号： C07H19/20

    摘要： New derivatives of S.sub.P - and R.sub.P -configures cyclic guanosine-3',5'-phosphorothioates and their physiologically and pharmaceutically acceptable salts according to the general formula ##STR1## are cell membrane permeable inhibitors (R.sub.P -isomers) and stimulators (S.sub.P -isomers) of cyclic GMP-dependent protein kinase which are resistant against phosphodiesterase degradation and suitable as ligands for affinity chromatography of cyclic nucleotide-dependent binding proteins.

    摘要翻译： SP-和RP的新衍生物配置环鸟嘌呤-3'，5'-硫代磷酸酯及其根据通式的生理和药学上可接受的盐是细胞膜可渗透抑制剂（RP-异构体）和刺激剂（SP- 异构体）具有抗磷酸二酯酶降解的环GMP依赖性蛋白激酶，并且适合作为环核苷酸依赖性结合蛋白的亲和层析的配体。