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41 条记录 (耗时 0.019 秒)

    Method of and apparatus for shutting down a gas-cooled nuclear reactor
    3.
    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
    4.
    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。

    Polymerization of cyclic olefins
    5.
    发明授权
    Polymerization of cyclic olefins 失效
    环烯烃的聚合

    公开(公告)号：US4046710A

    公开(公告)日：1977-09-06

    申请号：US652884

    申请日：1976-01-27

    申请人： Gunther Lehnert ,  Dieter Maertens ,  Gottfried Pampus ,  Josef Witte

    发明人： Gunther Lehnert ,  Dieter Maertens ,  Gottfried Pampus ,  Josef Witte

    IPC分类号： B01J31/34 ,  C08F4/62 ,  C08G61/08 ,  C08F4/78

    CPC分类号： B01J31/0202 ,  B01J31/0231 ,  B01J31/143 ,  B01J31/34 ,  C08F4/22 ,  C08G61/08 ,  B01J2231/12 ,  B01J27/10

    摘要： A process for the preparation of a catalyst for the polymerization and copolymerization of cyclic olefins which have 4, 5, 7 or more ring carbon atoms and at least one olefinic double bond in the ring, fromA. at least one halide or oxyhalide of molybdenum, preferably with molybdenum in the oxidation state +5,B. at least one 2-halo alcohol andC. at least one aluminium compound in the molar ratio of a : b = 1 : 1 to 1 : 10 and a : c = 1 : 0.5 to 1 : 30,Characterized in that the molybdenum halide or oxyhalide and the 2-halo alcohol are reacted with the exclusion of solvents or in the presence of chlorinated solvents which are inert towards the molybdenum salt and in which the molybdenum salt is soluble to an extent of at least 0.01 molar, and the aluminium alkyl compound is added, optionally in the presence of the monomers.

    摘要翻译： 一种用于制备环烷烃聚合和共聚的催化剂的方法，所述环烯烃在环中具有4,5,7个或更多个环碳原子和至少一个烯属双键，来自A。至少一种钼酸盐或二氧化钼 在氧化状态下优选与莫来石+5，B.至少一种2-羟基醇和C.至少一种铝化合物在A的摩尔比：B = 1：1至1：10而A：C = 1 ：0.5〜1：

    Graft polymers of vinyl phosphonic acid esters
    6.
    发明授权
    Graft polymers of vinyl phosphonic acid esters 失效
    乙烯基膦酸酯的接枝聚合物

    公开(公告)号：US4028434A

    公开(公告)日：1977-06-07

    申请号：US604680

    申请日：1975-08-14

    申请人： Wolfgang Konter ,  Josef Witte ,  Peter Vehlewald ,  Hans-Dieter Block

    发明人： Wolfgang Konter ,  Josef Witte ,  Peter Vehlewald ,  Hans-Dieter Block

    IPC分类号： C08F283/06 ,  C08L43/00

    CPC分类号： C08F283/06

    摘要： The instant invention relates to graft polymers of vinyl phosphonic acid esters, optionally together with nitrogen-containing polymerizable vinyl compounds, on polyalkylene glycols and to a process for their production. The polymers so produced necessarily contain phosphorus and, optionally, nitrogen in the molecule. The polymers are rendered flameproof by the phosphorus and, in addition, self-extinguishing by the nitrogen.

    摘要翻译： 本发明涉及乙烯基膦酸酯，任选与含氮可聚合乙烯基化合物一起在聚亚烷基二醇上的接枝聚合物及其生产方法。 如此生产的聚合物必须含有磷和任选地在分子中的氮。 聚合物由磷进行防火，另外由氮自熄。

    Non-discoloring stabilizers
    7.
    发明授权
    Non-discoloring stabilizers 失效
    非变色稳定剂

    公开(公告)号：US3960758A

    公开(公告)日：1976-06-01

    申请号：US484115

    申请日：1974-06-28

    申请人： Josef Witte ,  Dieter Theisen ,  Ernst Roos ,  Karl Nutzel

    发明人： Josef Witte ,  Dieter Theisen ,  Ernst Roos ,  Karl Nutzel

    IPC分类号： C08L65/00 ,  C08K5/375 ,  C08K5/526 ,  C08L23/02

    CPC分类号： C08K5/375 ,  C08K5/37 ,  C08K5/52 ,  C08K5/526

    摘要： A non-discoloring stabilizer system for trans-polypentenamer of:A. a sulphur-containing phenol of the formula: ##SPC1##In which R.sub.1 and R.sub.3 are alkyl groups with 1 to 8 carbon atoms, aralkyl radicals with 7 to 9 carbon atoms and cycloalkyl radicals with 5 to 7 carbon atoms, R.sub.3 represents hydrogen, alkyl groups with 1 to 8 carbon atoms, cyclohexyl, cyclohexenyl or methylcyclohexenyl, R.sub.4 represents alkyl groups with 1 to 12 carbon atoms or ##SPC2##Where R.sub.1, R.sub.2 and R.sub.3 are as defined above, andB. a phenol ester of phosphorous acid of the formula: ##SPC3##In which R.sub.5 represents an alkyl or cycloalkyl group with 5 to 10 carbon atoms, R.sub.6 and R.sub.7 are the same or different and represent hydrogen, alkyl and cycloalkyl radicals each with 1 to 7 carbon atoms.

    摘要翻译： 用于反式多聚戊烯的非变色稳定剂体系：