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152 条记录 (耗时 0.024 秒)

    Process for the catalytic vapor phase oxidation of ethylene
    64.
    发明授权
    Process for the catalytic vapor phase oxidation of ethylene 失效
    乙烯催化气相氧化的方法

    公开(公告)号：US5719299A

    公开(公告)日：1998-02-17

    申请号：US634108

    申请日：1996-04-17

    申请人： Arend Jan Te Raa

    发明人： Arend Jan Te Raa

    IPC分类号： C07D301/10 ,  C07D301/08

    CPC分类号： C07D301/10

    摘要： A process for the catalytic vapor-phase oxidation of ethylene with a molecular oxygen-containing gas, in a reactor comprising a multitude of reaction tubes containing a supported silver catalyst and surrounded by a heat-exchange fluid which enters the reactor in liquid form and leaves the reactor in vapor form, characterized in that between 5 and 100 wt % of the liquid heat-exchange fluid is introduced to the reactor at its downstream end, at a temperature which is at least 20.degree. C. below the temperature of the heat-exchange fluid on leaving the reactor.

    摘要翻译： 在含有分子氧的气体的乙烯的催化气相氧化方法中，在包含多个反应管的反应器中，所述反应管含有负载的银催化剂，并被以液体形式进入反应器的热交换流体包围 蒸气形式的反应器，其特征在于，在低于热交换器的温度的至少20℃的温度下，将5-100重量％的液体热交换流体在其下游端引入反应器， 在离开反应器时交换流体。

    Ethylene oxide catalyst and process
    65.
    发明授权
    Ethylene oxide catalyst and process 失效

    公开(公告)号：US5703253A

    公开(公告)日：1997-12-30

    申请号：US721643

    申请日：1996-09-26

    申请人： Wayne E. Evans ,  Carolus Matthias Anna Maria Mesters

    发明人： Wayne E. Evans ,  Carolus Matthias Anna Maria Mesters

    IPC分类号： C07D301/08 ,  B01J23/68 ,  C07D301/10

    CPC分类号： C07D301/10 ,  B01J23/688 ,  Y02P20/52

    摘要： This invention relates to ethylene oxide catalyst for the vapor phase production of ethylene oxide from ethylene and oxygen prepared by impregnating a porous, refractory support having a surface area ranging from about 0.05 to about 10 m.sup.2 /g with a solubilized catalytically effective amount of silver, a solubilized promoting amount of alkali metal, a solubilized promoting amount of rhenium, and a solubilized promoting amount of hafnium metal, wherein the Group IVB metal is provided in the form of Group IVB oxycation-containing salts. The catalyst provide substantial initial activity improvement as well as long term selectivity and activity stability improvement over prior art rhenium promoted catalyst, without any loss of initial selectivity advantage.

    Ethylene oxide catalyst and process
    66.
    发明授权
    Ethylene oxide catalyst and process 失效
    环氧乙烷催化剂及工艺

    公开(公告)号：US5597773A

    公开(公告)日：1997-01-28

    申请号：US366069

    申请日：1994-12-29

    申请人： Wayne E. Evans ,  Carolus M. A. M. Mesters

    发明人： Wayne E. Evans ,  Carolus M. A. M. Mesters

    IPC分类号： C07D301/08 ,  B01J23/68 ,  C07D301/10 ,  B01J21/06 ,  B01J23/04 ,  B01J23/50

    CPC分类号： C07D301/10 ,  B01J23/688 ,  Y02P20/52

    摘要： This invention relates to ethylene oxide catalyst for the vapor phase production of ethylene oxide from ethylene and oxygen prepared by impregnating a porous, refractory support having a surface area ranging from about 0.05 to about 10 m.sup.2 /g with a solubilized catalytically effective amount of silver, a solubilized promoting amount of alkali metal, a solubilized promoting amount of rhenium, and a solubilized promoting amount of hafnium metal, wherein the Group IVB metal is provided in the form of Group IVB oxycation-containing salts. The catalyst provide substantial initial activity improvement as well as long term selectivity and activity stability improvement over prior art rhenium promoted catalyst, without any loss of initial selectivity advantage.

    摘要翻译： 本发明涉及用乙烯和氧气气相生产环氧乙烷的环氧乙烷催化剂，其通过用溶解的催化有效量的银浸渍表面积为约0.05至约10m 2 / g的多孔耐火载体， 增溶促进量的碱金属，可溶促进量的铼和可溶促进量的铪金属，其中第IVB族金属以IVB族含氧化盐的形式提供。 与现有技术的铼促进的催化剂相比，催化剂提供了大量的初始活性改进以及长期选择性和活性稳定性改进，而没有任何初始选择性优势的损失。

    Ethylene oxide catalyst and process
    68.
    发明授权
    Ethylene oxide catalyst and process 失效
    环氧乙烷催化剂及工艺

    公开(公告)号：US5418202A

    公开(公告)日：1995-05-23

    申请号：US176044

    申请日：1993-12-30

    申请人： Wayne E. Evans ,  Carolus M. A. M. Mesters

    发明人： Wayne E. Evans ,  Carolus M. A. M. Mesters

    IPC分类号： C07D301/08 ,  B01J23/68 ,  C07D301/10 ,  B01J21/06 ,  B01J23/04 ,  B01J23/50

    CPC分类号： C07D301/10 ,  B01J23/688 ,  Y02P20/52

    摘要： This invention relates to ethylene oxide catalyst for the vapor phase production of ethylene oxide from ethylene and oxygen prepared by impregnating a porous, refractory support having a surface area ranging from about 0.05 to about 10 m.sup.2 /g with a solubilized catalytically effective amount of silver, a solubilized promoting amount of alkali metal, a solubilized promoting amount of rhenium, and a solubilized promoting amount of hafnium metal, wherein the Group IVB metal is provided in the form of Group IVB oxo salts. The catalyst provide substantial initial activity improvement as well as long term selectivity and activity stability improvement over prior art rhenium promoted catalyst, without any loss of initial selectivity advantage.

    摘要翻译： 本发明涉及用乙烯和氧气气相生产环氧乙烷的环氧乙烷催化剂，其通过用溶解的催化有效量的银浸渍表面积为约0.05至约10m 2 / g的多孔耐火载体， 增溶促进量的碱金属，可溶促进量的铼和可溶促进量的铪金属，其中IVB族金属以IVB族氧代盐的形式提供。 与现有技术的铼促进的催化剂相比，催化剂提供了大量的初始活性改进以及长期选择性和活性稳定性改进，而没有任何初始选择性优势的损失。

    Process for the production of oxides
    69.
    发明授权
    Process for the production of oxides 失效
    氧化物生产工艺

    公开(公告)号：US5043461A

    公开(公告)日：1991-08-27

    申请号：US518377

    申请日：1990-05-03

    申请人： Ramakrishnan Ramachandran ,  Mark J. Andrecovich ,  Donald L. MacLean ,  Donald P. Satchell, Jr.

    发明人： Ramakrishnan Ramachandran ,  Mark J. Andrecovich ,  Donald L. MacLean ,  Donald P. Satchell, Jr.

    IPC分类号： B01J19/00 ,  C07C253/26 ,  C07C253/34 ,  C07D301/08

    CPC分类号： B01J19/002 ,  C07D301/08 ,  Y02P20/582

    摘要： An improved process for the production of oxides from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter, in the presence of a suitable catalyst. An alkane, e.g. propane, is converted to an alkene in a catalytic dehydrogenator. The product stream is introduced into an oxidation reactor. Product formed therein is recovered in a conventional quench tower. The pressure of the gaseous effluent from the quench tower is raised and it is introduced into an absorber/stripper unit to form a recycle stream containing unreacted alkane and alkene as well as a minor amount of oxygen, typically 1-2 percent by volume, and a waste stream comprising the remainder of the quench tower gaseous phase. The recycle stream enters a selective oxidation unit wherein oxygen is removed, and the product recycled to the dehydrogenator. Flammability of the quench tower gaseous effluent and the waste stream from the absorber/stripper is minimized by assuring that the nonflammability index (NFI) thereof is within certain limits. Desired NFI, related to the total hydrocarbon content, may be achieved by the addition thereto of a gaseous flame suppressor. The gaseous flame suppressor, removed with the absorber/stripper unit waste stream, may advantageously be combusted to provide energy. A PSA unit may remove excess hydrogen from the dehydrogenator effluent. The dehydrogenator may be a multistage dehydrogenator.

    摘要翻译： 在合适的催化剂存在下，通过与氧气，空气或相对于空气富含氧的气体（优选后者）反应从烃生产氧化物的改进方法。 烷烃，例如 丙烷转化为催化脱氢剂中的烯烃。 将产物流引入氧化反应器中。 在其中形成的产物在常规骤冷塔中回收。 来自骤冷塔的气态流出物的压力升高，并将其引入吸收器/汽提器单元以形成含有未反应的烷烃和烯烃以及少量氧气（通常为1-2体积％）的再循环料流，以及 包括骤冷塔气相的剩余部分的废物流。 再循环流进入选择性氧化单元，其中除去氧，产物再循环到脱氢器中。 通过确保其不可燃性指数（NFI）在一定限度内，骤冷塔气态流出物和来自吸收器/汽提塔的废物流的易燃性被最小化。 与总碳氢化合物含量有关的所需NFI可以通过添加气态阻燃剂来实现。 用吸收器/汽提器单元废物流除去的气体火焰抑制器可以有利地被燃烧以提供能量。 PSA单元可以从脱氢器流出物中除去过量的氢。 脱氢剂可以是多级脱氢剂。