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77 条记录 (耗时 0.022 秒)

    Low temperature irradiation of vitrifiable mixtures of unsaturated monomers
    1.
    发明授权
    Low temperature irradiation of vitrifiable mixtures of unsaturated monomers 失效
    不饱和单体可玻璃化混合物的低温照射

    公开(公告)号：US3929602A

    公开(公告)日：1975-12-30

    申请号：US31339672

    申请日：1972-12-08

    申请人： JAPAN ATOMIC ENERGY RES INST

    发明人： KAETSU ISAO ,  ITO AKIHIKO ,  HAYASHI KOICHIRO

    IPC分类号： C08F2/00 ,  C08F2/46 ,  C08F2/48 ,  C08F2/54

    CPC分类号： C08F2/46

    摘要： A specific mixture containing at least one polymerizable unsaturated monomer which is not vitrifiable by itself can advantageously be polymerized by irradiating the mixture at a temperature not higher than 100*C above glass transition temperature of the mixture with an ionizing radiation and/or a light.

    摘要翻译： 含有至少一种本身不可玻璃化的可聚合不饱和单体的特定混合物可以有利地通过在电离辐射和/或光下在不高于100℃的温度高于混合物的玻璃化转变温度的温度下照射混合物来聚合。

    Process for polymerizing tetraoxane
    3.
    发明授权
    Process for polymerizing tetraoxane 失效
    聚四氟乙烯的方法

    公开(公告)号：US3719637A

    公开(公告)日：1973-03-06

    申请号：US3719637D

    申请日：1971-05-18

    申请人： JAPAN ATOMIC ENERGY RES INST

    发明人： ITO A ,  YOSHIDA M ,  NAKASE Y

    IPC分类号： C08G2/10 ,  C08F1/18 ,  C08G1/00 ,  C08G11/00

    CPC分类号： C08G2/10

    摘要： Tetraoxane is polymerized in the presence of both a carboxylic anhydride and a specific polymerization initiator, to obtain an oxymethylene polymer having excellent heat-stability. When thiirane or its derivatives, thiocyanates, or isothiocyanates are employed as the polymerization initiator, the thermal stability of the resulting polymer is further improved. An ionizing radiation or an ultraviolet light can concomitantly be employed before and/or in the course of polymerization.

    Inhibitors for aqueous phase, radiation polymerization
    4.
    发明授权
    Inhibitors for aqueous phase, radiation polymerization 失效
    水相抑制剂，辐射聚合

    公开(公告)号：US3714008A

    公开(公告)日：1973-01-30

    申请号：US3714008D

    申请日：1970-05-12

    申请人： JAPAN ATOMIC ENERGY RES INST

    发明人： TAKEHISA M ,  SENRUI S

    IPC分类号： C07C7/20 ,  C07C17/42 ,  C08F2/38 ,  C08F2/54 ,  C08D1/00 ,  C08F1/16

    CPC分类号： C07C17/42 ,  C07C7/20 ,  C08F2/38 ,  C07C15/46 ,  C07C11/06 ,  C07C11/08 ,  C07C21/06 ,  C07C21/08

    摘要： In the polymerization, in which an aqueous phase is employed, of ethylene, or ethylene and other unsubstituted or substituted olefinic monomers by means of an ionizing radiation, formation of an undesirable polymer in the aqueous phase of the reaction system is inhibited by using specific polymerization inhibitors. The inhibitors which have no adverse effect on the polymerization in the non-aqueous phase, comprise the electrolytes which have strong oxidizing action and/or react at high reaction rate with active species such as H radicals, OH radicals and/or hydrated electrons formed by ionizing radiation. According to the present invention, adhesion of undesirable polymer to the reactor walls during polymerization reaction is prevented and contamination which lowers the quality of the main polymer is eliminated.

    摘要翻译： 在使用水相的乙烯或乙烯和其它未取代或取代的烯属单体的聚合中，通过电离辐射，在反应体系的水相中形成不需要的聚合物通过使用特定的聚合来抑制 抑制剂。 对非水相中的聚合没有不利影响的抑制剂包括具有强氧化作用和/或以高反应速率与活性物质如H自由基，OH自由基和/或水合电子反应的电解质， 电离辐射。 根据本发明，防止了聚合反应期间不期望的聚合物对反应器壁的粘附，并且消除了降低主聚合物质量的污染。

    Steam generator or heater for an atomic power generating plant
    7.
    发明授权
    Steam generator or heater for an atomic power generating plant 失效
    用于原子发电厂的蒸汽发生器或加热器

    公开(公告)号：US3446188A

    公开(公告)日：1969-05-27

    申请号：US3446188D

    申请日：1967-01-03

    申请人： JAPAN ATOMIC ENERGY RES INST ,  NIPPON KOKAN KK

    发明人： NOZAWA MASAO ,  SAKO KIYOSHI ,  UEDA HIROSHI

    IPC分类号： F22B1/06 ,  F28D7/00 ,  G21D5/08

    CPC分类号： G21D5/08 ,  F22B1/063 ,  F28D7/0066 ,  F28D7/0083 ,  F28D2021/0054 ,  F28F2265/12 ,  F28F2265/16

    摘要： 1,177,533. Generating steam by indirect heat transfer. JAPAN ATOMIC ENERGY RESEARCH INSTITUTE and NIPPON KOHKAN K.K. 13 Jan., 1967 [14 Jan., 1966], No. 1913/67. Heading F4A. Liquid sodium coolant from a nuclear reactor (not shown) is passed through vertical tubes 2 extending between inlet nozzle 1 and outlet nozzle 3 of a steam generator casing 7. Water from inlet 4 flows in counter current through vertical, zig-zag or helical tubes 5, the steam so generated emerging through nozzle 6. Heat is transferred between the tube systems 2, 5 by liquid sodium acting as a heat transmission medium, which is introduced at inlet 9 and removed through outlet 10, to maintain a surface level 11. The level 11 may be varied to vary the rate of heat transfer in accordance with the load demand. The top space of the generator body contains an inert gas introduced through nozzle 13 and removed through nozzle 14. One or more rupture discs 15 may be provided in the casing 7. The generator may be of the through flow or recirculation types. It is stated to be known to heat an intermediate fluid by the coolant from the reactor core, in a separate heat exchange vessel located within or without the vessel containing the reactor, and then to circulate this intermediate fluid over steam generating tubes contained in a further vessel (Figs. 1 and 2, not shown).