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176 条记录 (耗时 0.012 秒)

    Catalytic process for hydrogen transfer between hydrocarbons
    63.
    发明公开
    Catalytic process for hydrogen transfer between hydrocarbons 失效
    用于烃之间氢转移的催化方法。

    公开(公告)号：EP0221332A1

    公开(公告)日：1987-05-13

    申请号：EP86113284.3

    申请日：1986-09-26

    申请人： ICI AUSTRALIA LIMITED

    发明人： Parris, David ,  Tonner, Steven Patrick

    IPC分类号： C07C5/52 ,  B01J23/92

    CPC分类号： C07C5/52 ,  B01J38/12 ,  Y02P20/584

    摘要： A transhydrogenation process for the conversion of alkanes to alkenes with high yields and extended catalyst life between regenerations comprises the passing of an alkane combined with a suitable hydrogen acceptor over a catalyst bed, subject to the conditions that

    (a) the pressure is from 0-4 atmospheres (gauge);
    (b) the hydrogen acceptor is present to the extent of from 5-30% by volume;
    (c) the temperature of the catalyst is from 400° - 600°C; and
    (d) the temperature of the catalyst is raised during the process at a rate of from l-l5 deg. C/hr.
    The catalyst is preferably a chromia on alumina type.

    Oxidizing fused ring compounds to quinones with aqueous acidic solutions of cerium
    66.
    发明公开
    Oxidizing fused ring compounds to quinones with aqueous acidic solutions of cerium 失效
    氧化反应器Ringverbindungen zu Chinonen mitwässrigensäurenCerium-Lösungen。

    公开(公告)号：EP0075828A1

    公开(公告)日：1983-04-06

    申请号：EP82108677.4

    申请日：1982-09-20

    申请人： DIAMOND SHAMROCK CORPORATION

    发明人： Mayeda, Edward A. ,  Abrahamson, Donald W.

    IPC分类号： C07C46/04 ,  C07C50/12 ,  C07C50/18 ,  B01J23/92

    CPC分类号： C07C46/04 ,  Y02P20/582 ,  C07C50/18

    摘要： An efficient and economical process is disclosed for oxidizing fused ring hydrocarbons to quinones by means of an aqueous acidic solution of cerium. The aqueous solution employed comprises dilute nitric acid containing a total cerium content of between about 0.5 and about 1.5 gram atoms per liter, about 30% to about 70% of which but not less than about 0.2 gram atom per liter is in the tetravalent state. Said aqueous acidic solution can be easily recovered and electrolytically treated at commercially attractive current densities of one ampere per square inch or higher to regenerate tetravalent cerium for reuse in oxidizing additional quantities of fused ring hydrocarbon.

    摘要翻译： 公开了一种通过铈的酸性水溶液将稠环烃氧化为醌的有效和经济的方法。 所用的水溶液包括含有约0.5-约1.5克原子/升，约30％至约70％，但不低于约0.2克原子/升的四氢化钠的稀硝酸。 所述酸性水溶液可以容易地回收并以商业上有吸引力的1安培/平方英寸或更高的电流密度进行电解处理，以再生四价铈以用于氧化额外量的稠环烃。

    A method for the activation, maintenance of activity, improvement of activity and reactivation of phosphomolybdic acid based catalysts
    67.
    发明公开
    A method for the activation, maintenance of activity, improvement of activity and reactivation of phosphomolybdic acid based catalysts 失效
    对于活化，维护方法并增加磷酸催化剂的活性和活化。

    公开(公告)号：EP0036057A1

    公开(公告)日：1981-09-23

    申请号：EP80304639.0

    申请日：1980-12-19

    申请人： THE STANDARD OIL COMPANY

    发明人： Farrington, Diane Gladys ,  Paparizos, Christos ,  White, James Ferguson ,  Shaw, Wilfrid Garside

    IPC分类号： B01J27/18 ,  B01J27/28 ,  B01J23/28 ,  B01J23/92 ,  B01J23/88 ,  B01J23/68

    CPC分类号： B01J23/94 ,  B01J23/92 ,  B01J27/285

    摘要： The present invention relates to a method for the activation, maintenance and improvement of activity during reactor shutdown, and reactivation of PMA based catalysts by treating the catalyst precursor with a nitrogen-containing compound such as an oxide of nitrogen gas or a nitrogen acid such as nitric or nitrous at a temperature of from about 100°C to about 400°C. The method can be employed for activation in a reactor by loading the catalyst precursor, adjusting the reactor temperature to one suitable for activation and optionally sweeping the reactor with an inert gas followed by the treating step. The method can also be employed for maintenance of activity of the catalyst in the reactor by terminating the feed of hydrocarbon to the reactor and then flushing the reactor. The method can be employed for catalyst reactivation in the reactor by terminating the feed of reactant to the reactor, adjusting the reactor temperature as may be necessary to one suitable for reactivation and sweeping the reactor with a gas. Alternatively, the catalyst can be removed from the reactor for reactivation.

    摘要翻译： 如氮气或氮酸的氧化物：由本发明处理催化剂前体与含氮化合物涉及用于激活，活性的反应器关闭期间的基于PMA催化剂的维护和改进，和再活化的方法，如 硝酸或亚硝酸在从约10℃可以在反应器中通过加载的催化剂前体，调节反应器温度到一个适合于激活和任选扫与反应器被用于活化的方法的温度至约400°至C. 随后所述处理步骤的惰性气体。 因此，可以通过终止烃进料至反应器中，然后冲洗该反应器被用于维持该反应器中的催化剂的活性的方法。 可以通过终止反应物的进料至反应器中，调节反应器的温度可能是必要的，以一个适合于活化和用气体清扫反应器被用于催化剂再活化反应器中的方法。 或者，催化剂可从反应器中重新激活被移除。

    ALUMINE À ACIDITÉ ET STRUCTURE DE POROSITÉ OPTIMALES
    70.
    发明公开
    ALUMINE À ACIDITÉ ET STRUCTURE DE POROSITÉ OPTIMALES 审中-公开

    公开(公告)号：EP3599020A1

    公开(公告)日：2020-01-29

    申请号：EP19186774.6

    申请日：2019-07-17

    申请人： AXENS

    发明人： NEDEZ, Christophe ,  DUCREUX, Olivier

    IPC分类号： B01J21/04 ,  B01J23/04 ,  B01J35/10 ,  B01J23/92 ,  B01J20/08 ,  B01J37/08 ,  C01F7/44 ,  C07C1/24 ,  C07C5/25 ,  C07C11/06

    摘要： L'invention concerne une alumine présentant une structure de porosité telle que le volume des pores dont le diamètre est compris entre 70 et 2 000 À est compris entre 0,15 et 0,50 ml/g, et comprenant au moins un métal alcalin (M), telle que la teneur massique en métal alcalin, exprimée en M 2 O, est comprise entre 400 et 1500 ppm par rapport à la masse totale de l'alumine. L'invention concerne également un procédé de transformation d'une charge comprenant au moins un alcool en effluent oléfinique, ledit procédé comprenant une étape de déshydratation dudit alcool en présence de l'alumine selon la présente invention, ayant une acidité et une structure de porosité optimales.