Selective catalytic reduction of nitrogen oxides
    2.
    发明授权
    Selective catalytic reduction of nitrogen oxides 失效
    氮氧化物的选择性催化还原

    公开(公告)号:US5552128A

    公开(公告)日:1996-09-03

    申请号:US410156

    申请日:1995-03-24

    摘要: There is provided a catalytic method for converting nitrogen oxides to nitrogen (i.e., N.sub.2). The catalyst for this method comprises an acidic solid component comprising a Group IVB metal oxide modified with an oxyanion of a Group VIB metal and further comprising at least one metal selected from the group consisting of Group IB, Group IVA, Group VB, Group VIIB, Group VIII, and mixtures thereof. An example of this catalyst is zirconia, modified with tungstate, and iron. This method may be used for reducing emissions of nitrogen oxides from waste gases, including industrial exhaust gases and automobile exhaust gases. In a particular embodiment, nitrogen oxides in waste gases may be reacted with ammonia before the waste gases are discharged to the atmosphere.

    摘要翻译: 提供了将氮氧化物转化为氮气(即N 2)的催化方法。 用于该方法的催化剂包括酸性固体组分,其包含用VIB族金属的氧阴离子改性的IVB族金属氧化物,并且还包含选自组IB,组IVA,组VB,组VIIB的至少一种金属, VIII族及其混合物。 该催化剂的实例是用钨酸盐和铁改性的氧化锆。 该方法可用于减少来自废气(包括工业废气和汽车废气)的氮氧化物的排放。 在一个具体实施方案中,废气中的氮氧化物可以在废气排放到大气中之前与氨反应。

    Olefin epoxidation catalysts
    6.
    发明授权
    Olefin epoxidation catalysts 有权
    烯烃环氧化催化剂

    公开(公告)号:US6114551A

    公开(公告)日:2000-09-05

    申请号:US412773

    申请日:1999-10-04

    摘要: A method of synthesizing an olefin epoxidation catalyst comprises the step of treating a porous crystalline aluminosilicate material having an X-ray diffraction pattern including d-spacing maxima at 12.4.+-.0.25, 6.9.+-.0.15, 3.57.+-.0.07 and 3.42.+-.0.07 Angstrom, such as MCM-22, with a dealuminating agent under conditions effective to remove framework aluminium from the material and produce a dealuminated product. The dealuminated product is then treated with a titanium-containing material under conditions effective to insert titanium into the dealuminated product and produce a titanium-containing, dealuminated catalyst composition.The resultant catalyst is useful in the epoxidation of olefins, such as propylene and cyclohexene, with hydrogen peroxide and organic hydroperoxides.

    摘要翻译: 合成烯烃环氧化催化剂的方法包括以下步骤:处理多晶结晶硅铝酸盐材料,该多晶结晶硅铝酸盐材料具有包含d间距最大值的X射线衍射图,为12.4 +/- 0.25,6.9 +/- 0.15,3.57 +/- 0.07和3.42 +/- 0.07埃,例如MCM-22,在有效从材料中除去骨架铝并产生脱铝产品的条件下用脱铝剂。 然后在有效地将钛插入脱铝产品中并且生产含钛脱铝催化剂组合物的条件下,用含钛材料处理脱铝产品。 得到的催化剂可用于烯烃如丙烯和环己烯与过氧化氢和有机氢过氧化物的环氧化。

    Isomerization process
    7.
    发明授权
    Isomerization process 失效
    异构化过程

    公开(公告)号:US6080904A

    公开(公告)日:2000-06-27

    申请号:US728395

    申请日:1996-10-09

    IPC分类号: C07C5/27 C07C5/13

    摘要: There is provided an isomerization process using a catalyst comprising a hydrogenation/dehydrogenation component, such as a noble metal, and an acidic solid component comprising a Group IVB metal oxide modified with an oxyanion of a Group VIB metal. An example of this catalyst is zirconia, modified with tungstate and platinum. This catalyst is used to isomerize, for example, C.sub.4 to C.sub.8 paraffins. The feed to this paraffin isomerization reaction may, optionally, include cyclic hydrocarbons, such as benzene or cyclohexane, which may undergo ring opening reactions during the course of the isomerization reaction.

    摘要翻译: 提供使用包含氢化/脱氢组分如贵金属的催化剂和包含用VIB族金属的氧阴离子改性的IVB族金属氧化物的酸性固体组分的异构化方法。 该催化剂的实例是用钨酸盐和铂改性的氧化锆。 该催化剂用于异构化例如C 4至C 8链烷烃。 这种链烷烃异构化反应的进料可以任选地包括在异构化反应过程中可能经历开环反应的环烃,例如苯或环己烷。

    Process for preparing organic carbonates
    8.
    发明授权
    Process for preparing organic carbonates 有权
    制备有机碳酸酯的方法

    公开(公告)号:US6008399A

    公开(公告)日:1999-12-28

    申请号:US266623

    申请日:1999-03-11

    IPC分类号: C07C68/00

    CPC分类号: C07C68/00

    摘要: A process for preparing organic carbonates, such as dimethyl carbonate, without the use of phosgene and with a high yield and selectivity to the desired carbonate, by reacting a formaldehyde-acetal with a source of oxygen, in the presence of a catalyst.

    摘要翻译: 在催化剂存在下,通过使甲醛缩醛与氧源反应,制备有机碳酸酯如碳酸二甲酯的方法,而不使用光气,并且对所需碳酸酯具有高产率和选择性。