Heat exchange catalytic reactor
    2.
    发明授权
    Heat exchange catalytic reactor 失效
    热交换催化反应器

    公开(公告)号:US6039113A

    公开(公告)日:2000-03-21

    申请号:US101369

    申请日:1998-07-09

    摘要: A heat exchange catalytic process and reactor of the shell-and-tube type having a plurality of tubes extending longitudinally through the shell from a tube fluid inlet region to a tube fluid outlet region and baffles extending transversely across the shell dividing the shell between said inlet and outlet regions into at least three heat exchange zones through which each tube passes in sequence in heat exchange with that zone. A shell fluid is passed through the heat exchange zones in heat exchange with the tube fluid passing through the tubes. Transfer passages are provided connencting the heat exchange zones and are disposed so that the shell fluid passes through the second zone before or after it has passed through both the first and third zones. A particulate catalyst is disposed in either the shell heat exchange zones or, preferably, the tubes. The process utilises a heat exchange medium, particularly water, that does not change state under the prevailing conditions and is preferably fed to the shell heat exchange zones while the reactant stream passes through the catalyst disposed in the tubes. The process is particularly applicable to the selective hydrogenation of acetylenes in the presence of olefins.

    摘要翻译: PCT No.PCT / GB96 / 02999第 371日期:1998年7月9日 102(e)日期1998年7月9日PCT 1996年12月6日PCT PCT。 出版物WO97 / 25136 日期1997年7月17日一种管壳式热交换催化工艺和反应器,其具有多个管,其从管流体入口区域纵向延伸穿过壳体到管流体出口区域,横向延伸穿过壳体分隔件 所述入口区域和出口区域之间的壳体进入至少三个热交换区域,每个管道通过该热交换区域与该区域热交换依次通过。 壳体流体通过与通过管的管流体热交换的热交换区。 提供与热交换区相连接的转移通道,并且设置成使得壳体流体在其通过第一和第三区域之前或之后通过第二区域。 颗粒催化剂设置在壳体热交换区域中,或优选地设置在管道中。 该方法利用在主要条件下不改变状态的热交换介质,特别是水,并且优选在反应物流通过设置在管中的催化剂的同时进料到壳体热交换区。 该方法特别适用于乙烯在烯烃存在下的选择性氢化。

    Catalytic process
    3.
    发明授权
    Catalytic process 失效
    催化过程

    公开(公告)号:US5859070A

    公开(公告)日:1999-01-12

    申请号:US624454

    申请日:1996-07-22

    摘要: Synthesis of small quantities of compounds such as methanol from reagents, especially radio-labelled reagents such as .sup.11 C oxides, in a carrier gas by a catalytic reaction using a catalyst that has been pre-conditioned for the reaction by previous use for the desired reaction and has then been passivated, or has been maintained in the pre-conditioned state, until contacted with said carrier gas. Where the product is adsorbed by the catalyst, it may be desorbed by heating or displaced by contacting the catalyst with a material, e.g. a catalyst poison that is more strongly adsorbed. Such a more strongly adsorbed material may react with the adsorbed catalytic product to produce a desired product.

    摘要翻译: PCT No.PCT / GB94 / 02204 Sec。 371日期:1996年7月22日 102(e)日期1996年7月22日PCT 1994年10月10日PCT PCT。 公开号WO95 / 11080 PCT 日期1995年04月27日通过催化反应使用已经通过先前使用的反应预处理的催化剂,在载气中合成少量化合物如甲醇,特别是放射性标记试剂如11C氧化物 进行所需的反应,然后被钝化,或者已经保持在预处理状态,直到与所述载气接触。 当产物被催化剂吸附时,其可以通过加热或取代而被解吸,通过使催化剂与材料接触,例如, 更强烈吸附的催化剂毒物。 这种更强吸附的材料可以与吸附的催化产物反应以产生所需的产物。

    Process for oxidation of ammonia
    4.
    发明授权
    Process for oxidation of ammonia 失效
    氨氧化工艺

    公开(公告)号:US06827917B1

    公开(公告)日:2004-12-07

    申请号:US09334986

    申请日:1999-06-17

    IPC分类号: C01B2126

    CPC分类号: B01J23/83 C01B21/265

    摘要: A catalyst for oxidation reactions, particularly the oxidation of ammonia comprises oxides of (a) at least one element A selected from rare earths and yttrium, and (b) cobalt and element A being in such proportions that the element A to cobalt atomic ratio is in the range 0.8 to 1.2, at least some of said cobalt and element A oxides being present as a mixed oxide phase with less than 25% of the cobalt (by atoms) being present as free cobalt oxides, is disclosed. The catalyst may be supported on a secondary support in the form of an alkali-free alumina or lanthana wash coat on a primary support in the form of a mesh, gauze, pad, or monolith formed from a high temperature iron/aluminum alloy or a mesh, gauze, pad, monolith, or foam of a ceramic material.

    摘要翻译: 用于氧化反应的催化剂,特别是氨的氧化包括(a)至少一种选自稀土和钇的元素A的氧化物,和(b)钴和元素A的比例使得元素A与钴的原子比为 在0.8至1.2的范围内,所述钴和元素A氧化物中的至少一些以作为游离钴氧化物存在的小于25%的钴(原子)存在的混合氧化物相存在。 催化剂可以以不含碱的氧化铝或氧化镧洗涤剂的形式负载在主要载体上,形式为网状,纱布,垫,或由高温铁/铝合金或由 网,纱布,垫,整料或泡沫。

    Multi-bed selective hydrogenation of acetylenes
    5.
    发明授权
    Multi-bed selective hydrogenation of acetylenes 失效
    乙炔的多床选择性氢化

    公开(公告)号:US6011188A

    公开(公告)日:2000-01-04

    申请号:US637817

    申请日:1996-05-03

    CPC分类号: C10G70/02 C07C5/08

    摘要: Compensation for catalyst activity decline in multi-bed selective hydrogenation of acetylenes in the presence of olefins by providing inter-bed heating so that the product from the first bed is heated before it is fed to the second bed, and the temperature at which the product from the first bed is fed to the second bed is increased as the catalyst activity declines. In a modification, when the catalyst is fresh, the product from the first bed is cooled before it is fed to the second bed, but, as the catalyst activity declines the temperature at which the product from the first bed is fed to the second bed is increased, so that after a period of use the product from the first bed is heated before it is fed to the second bed.

    摘要翻译: PCT No.PCT / GB94 / 02501 Sec。 371日期:1996年5月3日 102(e)日期1996年5月3日PCT 1994年11月14日PCT PCT。 WO95 / 15365 PCT出版物 日期1995年6月8日在烯烃存在下,通过提供床间加热来补偿炔烃在多床选择性加氢中的催化剂活性的降低,使得来自第一床的产物在进料到第二床之前被加热, 随着催化剂活性的降低,来自第一床的产物进料到第二床的温度升高。 在一个修改中,当催化剂新鲜时,来自第一床的产物在被送入第二床之前被冷却,但是当催化剂活性降低时,来自第一床的产物被送入第二床 增加,使得在使用一段时间之后,将来自第一床的产品在进料到第二床之前被加热。