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41 条记录 (耗时 0.021 秒)

    Method of and apparatus for shutting down a gas-cooled nuclear reactor
    5.
    发明授权
    Method of and apparatus for shutting down a gas-cooled nuclear reactor 失效
    关闭气冷式核反应堆的方法和装置

    公开(公告)号：US4279697A

    公开(公告)日：1981-07-21

    申请号：US964937

    申请日：1978-11-30

    申请人： Theodor Overhoff ,  Rudolf Schulten ,  Jasbir Singh ,  Gerd Sylvester ,  Josef Witte

    发明人： Theodor Overhoff ,  Rudolf Schulten ,  Jasbir Singh ,  Gerd Sylvester ,  Josef Witte

    IPC分类号： G21C9/033 ,  G21C7/22 ,  G21C9/02 ,  G21C7/06

    CPC分类号： G21C9/02 ,  G21C7/22 ,  Y02E30/33 ,  Y02E30/39

    摘要： A gas-cooled nuclear reactor whose nuclear-fuel elements are constituted by graphite-encapsulated nuclear fuel particles and have graphite coatings is shut down in accordance with the present invention by introducing into the primary coolant gas circulation, a gadolinium-containing substance which is dispersed in the primary cooling gas before the latter enters the space between the fuel elements within the reactor core so that the gadolinium-containing substance is at least partly deposited on the free graphitic surfaces of the fuel elements.

    摘要翻译： 一种气体冷却的核反应堆，其核燃料元件由石墨包封的核燃料颗粒构成并具有石墨涂层，根据本发明通过将主要的冷却剂气体循环引入分散的含钆物质来关闭 在第一冷却气体中，其在后者进入反应堆堆芯内的燃料元件之间的空间中，使得含钆物质至少部分地沉积在燃料元件的游离石墨表面上。

    Catalyst and its preparation and use for the solution polymerization of conjugated dienes
    6.
    发明授权
    Catalyst and its preparation and use for the solution polymerization of conjugated dienes 失效
    催化剂及其制备和用途，用于共轭二烯的溶液聚合

    公开(公告)号：US4242232A

    公开(公告)日：1980-12-30

    申请号：US54632

    申请日：1979-07-03

    申请人： Gerd Sylvester ,  Josef Witte ,  Gunter Marwede

    发明人： Gerd Sylvester ,  Josef Witte ,  Gunter Marwede

    IPC分类号： C08F4/00 ,  C08F4/60 ,  C08F4/62 ,  C08F4/72 ,  C08F36/00 ,  C08F36/04 ,  C08F4/12

    CPC分类号： C08F36/04

    摘要： A catalyst comprising(a) a reaction mixture formed by reacting M(RCO.sub.2).sub.3 with AlR.sub.3'.sup.1(b) AlR.sub.3.sup.2 and / or HAlR.sub.2.sup.2 and(c) a Lewis acidwherein M denotes a trivalent rare earth element with an atomic number of 57 to 71, R denotes a saturated or unsaturated, straight chain or branched chain aliphatic hydrocarbon group having 1 to 20 C-atoms which may be substituted one or more times with cycloalkyl having 5 to 7-atoms and/or phenyl, the carboxyl group being attached to a primary, secondary or tertiary C-atom; a cycloalkyl group having 5 to 7 ring carbon atoms, which may be substituted one or more times with alkyl groups having from 1 to 5 C-atoms; or an aromatic group having from 6 to 10 ring carbon atoms, which may be substituted one or more times with alkyl groups having 1 to 5 C-atoms, and R.sup.1 and R.sup.2 are identical or different, straight chain or branched chain alkyl groups having from 1 to 10 C-atoms. Said catalyst may be used for polymerizing diene monomers in solution. Its production takes place by mixing the components in any order.

    摘要翻译： 一种催化剂，其包含（a）通过M（RCO 2）3与AlR 3'1（b）AlR 32和/或HA 1R 22反应形成的反应混合物和（c）路易斯酸，其中M表示原子序数为57的三价稀土元素 至71，R表示具有1至20个C原子的饱和或不饱和的直链或支链脂族烃基，其可以被具有5至7个原子的环烷基和/或苯基取代一次或多次，羧基为 连接到伯，仲或叔C原子上; 具有5至7个环碳原子的环烷基，其可以被具有1至5个C原子的烷基取代一次或多次; 或具有6至10个环碳原子的芳族基团，其可以被具有1至5个C原子的烷基取代一次或多次，并且R 1和R 2相同或不同，具有直链或支链烷基 1〜10个碳原子。 所述催化剂可用于在溶液中聚合二烯单体。 其生产通过以任何顺序混合组分进行。

    Process and catalyst for the preparation of syndiotactic 1,2,-polybutadiene
    8.
    发明授权
    Process and catalyst for the preparation of syndiotactic 1,2,-polybutadiene 失效
    制备间同立构1,2-，聚丁二烯的方法和催化剂

    公开(公告)号：US4751275A

    公开(公告)日：1988-06-14

    申请号：US919707

    申请日：1986-10-16

    申请人： Josef Witte ,  Gerd Sylvester ,  Bernd Stollfuss

    发明人： Josef Witte ,  Gerd Sylvester ,  Bernd Stollfuss

    IPC分类号： C08F4/60 ,  C08F4/62 ,  C08F4/69 ,  C08F136/06

    CPC分类号： C08F136/06 ,  Y10S526/903

    摘要： Syndiotactic 1,2-polybutadiene of high quality may be obtained in excellent yield by solution polymerization of butadiene-(1,3) in hydrocarbons, using organometallic mixed catalysts composed of trialkylaluminium, hydrocarbon-soluble chromium-III compounds and a dialkylphosphite corresponding to the formula ##STR1## wherein R denotes straight chained or branched C.sub.1 -C.sub.8 -alkyl andR.sub.1, R.sub.2 and R.sub.3 denote methyl or ethyl orR and R.sub.1 together form a methylene group.

    摘要翻译： 使用由三烷基铝，可溶于烃的铬-III化合物和对应于其的二烷基亚磷酸酯组成的有机金属混合催化剂，可以通过在烃中的丁二烯 - （1,3）的溶液聚合获得高质量的间同立构1,2-聚丁二烯 其中R表示直链或支链C 1 -C 8 - 烷基，R 1，R 2和R 3表示甲基或乙基，或R 1和R 2一起形成亚甲基。

    Solution polymerization of conjugated dienes
    9.
    发明授权
    Solution polymerization of conjugated dienes 失效
    共轭二烯的溶液聚合

    公开(公告)号：US4260707A

    公开(公告)日：1981-04-07

    申请号：US117523

    申请日：1980-02-01

    申请人： Gerd Sylvester ,  Josef Witte ,  Gunter Marwede

    发明人： Gerd Sylvester ,  Josef Witte ,  Gunter Marwede

    IPC分类号： C08F4/00 ,  C08F4/60 ,  C08F4/62 ,  C08F4/72 ,  C08F36/00 ,  C08F36/04 ,  C08F4/52

    CPC分类号： C08F36/04

    摘要： A catalyst comprising(a) a reaction mixture formed by reacting M(RCO.sub.2).sub.3 with AlR.sub.3.sup.1,(b) AlR.sub.3.sup.2 and/or HAlR.sub.2.sup.2 and(c) a Lewis acidwherein M denotes a trivalent rare earth element with an atomic number of 57 to 71, R denotes a saturated or unsaturated, straight chain or branched chain alkyl group having 1 to 20 C-atoms which may be substituted one or more times with cycloalkyl having 5 to 7-atoms and/or phenyl, the carboxyl group being attached to a primary, secondary or tertiary C-atom; a cycloalkyl group having 5 to 7 ring carbon atoms, which may be substituted one or more times with alkyl groups having from 1 to 5 C-atoms; or an aromatic group having from 6 to 10 ring carbon atoms, which may be substituted one or more times with alkyl groups having 1 to 5 C-atoms, and R.sup.1 and R.sup.2 are identical or different, straight chain or branched chain alkyl groups having from 1 to 10 C-atoms. Said catalyst may be used for polymerizing diene monomers in solution. Its production takes place by mixing the components in any order.

    摘要翻译： 一种催化剂，其包含（a）通过使M（RCO 2）3与AlR 31反应形成的反应混合物，（b）AlR32和/或HAR1R22和（c）路易斯酸，其中M表示原子序数为57〜 71，R表示具有1〜20个碳原子的饱和或不饱和的直链或支链烷基，其可以被具有5至7个原子的环烷基和/或苯基取代一次或多次，羧基连接到 一级，二级或三级C原子; 具有5至7个环碳原子的环烷基，其可以被具有1至5个C原子的烷基取代一次或多次; 或具有6至10个环碳原子的芳族基团，其可以被具有1至5个C原子的烷基取代一次或多次，并且R 1和R 2相同或不同，具有直链或支链烷基 1〜10个C原子。 所述催化剂可用于在溶液中聚合二烯单体。 其生产通过以任何顺序混合组分进行。

    Catalyst, its preparation and use in the polymerization of butadiene
    10.
    发明授权
    Catalyst, its preparation and use in the polymerization of butadiene 失效
    催化剂，其制备和用于丁二烯聚合

    公开(公告)号：US4216121A

    公开(公告)日：1980-08-05

    申请号：US5445

    申请日：1979-01-22

    申请人： Gerd Sylvester ,  Manfred Beck ,  Josef Witte ,  Gottfried Pampus

    发明人： Gerd Sylvester ,  Manfred Beck ,  Josef Witte ,  Gottfried Pampus

    IPC分类号： C08F4/00 ,  C08F4/60 ,  C08F4/619 ,  C08F4/64 ,  C08F36/00 ,  C08F136/06

    CPC分类号： C08F136/06

    摘要： A catalyst composition comprising (a) TiI.sub.4 and/or TiOR.sup.1 I.sub.3, (b) AlR.sub.3 and/or HAlR.sub.2 and (c) TiXCl.sub.3 can be used for polymerizing butadiene. Said catalyst can be obtained by mixing the components a, b and c in any order at temperatures from -10.degree. to +80.degree. C. R' represents C.sub.1-8 alkyl and X represents a C.sub.1-12 alkoxy radical optionally substituted one or more times by halogen, C.sub.6 or C.sub.7 cycloalkyl and/or phenyl, a C.sub.5-7 cycloalkoxy radical optionally substituted one or more times by C.sub.1-5 alkyl groups, a phenoxy group corresponding to the formula ##STR1## wherein R.sub.2 and R.sub.6 can be the same or different and are hydrogen or C.sub.1-5 alkyl, a carboxyl group having the formula R.sup.7 --COO wherein R.sup.7 is C.sub.1-12 alkyl optionally substituted one or more times by halogen, C.sub.5-7 cycloalkyl and/or phenyl, a C.sub.5-7 cycloalkyl radical optionally substituted one or more times by C.sub.1-5 alkyl groups, or phenyl.

    摘要翻译： 包含（a）TiI4和/或TiOR1I3，（b）AlR3和/或HA1R2和（c）TiXCl3的催化剂组合物可用于聚合丁二烯。 所述催化剂可以通过在-10℃至+ 80℃的温度下以任何顺序混合组分a，b和c来获得.R'表示C1-8烷基，X表示任选被一个或多个取代基取代的C 1-12烷氧基 卤素，C6或C7环烷基和/或苯基，C5-7环烷​​氧基任选被C1-5烷基取代一次或多次，苯酚基团相应于通式其中R2和R6可以相同 或不同的是氢或C 1-5烷基，具有式R7-COO的羧基，其中R7是任选被卤素，C 5-7环烷​​基和/或苯基取代一次或多次的C 1-12烷基，C 5-7环烷​​基 任选地被C 1-5烷基取代的一个或多个自由基，或苯基。