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315 条记录 (耗时 0.013 秒)

    Exhaust gas purifying catalyst and process of making and using same
    41.
    发明授权
    Exhaust gas purifying catalyst and process of making and using same 失效
    废气净化催化剂及其制造和使用过程

    公开(公告)号：US4034060A

    公开(公告)日：1977-07-05

    申请号：US685958

    申请日：1976-05-13

    申请人： Edgar Koberstein ,  Eduard Lakatos

    发明人： Edgar Koberstein ,  Eduard Lakatos

    IPC分类号： B01D53/86 ,  B01J23/86 ,  B01J37/00 ,  C01B21/20 ,  C01B31/18

    CPC分类号： B01D53/86 ,  B01J23/86 ,  B01J37/0018

    摘要： A process for preparing an oxidic, carrier catalyst comprising at least one heavy metal compound as active component, said process comprising providing a carrier comprising a temperature resistant material with a catalytically active coating by intensively mixing said carrier with a binding agent, and at least one pulverulent, oxidic heavy metal compound or with a pulverulent mass containing at least one of said oxidic heavy metal compounds or at least one hydroxyl group-containing precursor of said heavy metal compounds, and subsequently heating the resulting mass to remove said binding agent. The catalyst and the process of using the catalyst in the purification of exhaust gases are provided.

    摘要翻译： 一种制备包含至少一种重金属化合物作为活性组分的氧化性载体催化剂的方法，所述方法包括通过将所述载体与结合剂强烈混合而提供包含具有催化活性涂层的耐温材料的载体，以及至少一种 粉状，氧化重金属化合物或含有至少一种所述氧化重金属化合物或所述重金属化合物的至少一种含羟基的前体的粉状物质，随后加热所得物质以除去所述粘合剂。 提供催化剂和在废气净化中使用催化剂的方法。

    Process for reactivating platinum catalysts used in production of hydroxylammonium salts
    42.
    发明授权
    Process for reactivating platinum catalysts used in production of hydroxylammonium salts 失效
    用于生产羟基铵盐的铂催化剂的再生方法

    公开(公告)号：US3966635A

    公开(公告)日：1976-06-29

    申请号：US558703

    申请日：1975-03-17

    申请人： Hussain El-Ghatta ,  Johann Karl Forrer

    发明人： Hussain El-Ghatta ,  Johann Karl Forrer

    IPC分类号： B01D53/94 ,  B01D53/86 ,  B01J23/96 ,  B01J37/20 ,  B01J38/10 ,  C01B21/14 ,  B01J23/42 ,  C01B21/20

    CPC分类号： B01J23/96 ,  B01J37/20 ,  C01B21/1418 ,  Y02P20/584

    摘要： A process for reactivating platinum catalysts is disclosed. It comprises treating a platinum catalyst having reduced activity and selectivityA. in a first stage with an acid solution of a sulfur compound which liberates sulfurous acid in acid medium, and a hydroxylammonium salt, said treatment being conducted in the absence of oxidizing agents capable of oxidizing sulfurous acid to sulfate, andB. in a second stage with an acid solution of platinum (II) or platinum (IV) compounds in the presence of hydrogen.

    摘要翻译： 公开了一种重新激活铂催化剂的方法。 其包括处理具有降低的活性和选择性A的铂催化剂。在具有酸性溶液中的硫酸化合物的酸溶液的酸溶液和羟基磺酸盐的第一阶段中，在可氧化的化学药剂的情况下导致的酸处理 在硫酸存在下，用硫酸钠（II）或铂（IV）化合物的酸溶液在第二阶段氧化硫酸。

    Method for treating titanium dioxide reactor discharge containing products of nitrogen fixation
    44.
    发明授权
    Method for treating titanium dioxide reactor discharge containing products of nitrogen fixation 失效
    用于处理含氮固定产物的二氧化钛反应器放电的方法

    公开(公告)号：US3650695A

    公开(公告)日：1972-03-21

    申请号：US3650695D

    申请日：1969-08-28

    申请人： PPG INDUSTRIES INC

    发明人： BOGDAN JOHN R ,  FARMER ALONZO

    IPC分类号： C01G23/07 ,  C01G23/04 ,  C01B21/20

    CPC分类号： C01G23/075 ,  C01G23/07

    摘要： Pigmentary titanium dioxide is produced by vapor phase oxidation of titanium tetrachloride with oxygen at elevated temperatures in a reactor. Gaseous and solid products produced by the reaction are separated and chlorine recovered from the gaseous portion in a chlorine recovery zone. Obstruction of the chlorine recovery zone by products resulting from nitrogen fixation is prevented by scrubbing reactor discharge gas with liquid chlorine, liquid titanium tetrachloride or liquid chlorinated solvents. Removal of the obstruction is accomplished by heating the chlorine recovery zone.

    摘要翻译： 通过在反应器中在升高的温度下用氧气四氧化钛气化氧化产生着色二氧化钛。 由反应产生的气态和固体产物被分离，氯回收区的气体部分回收氯。 通过用液氯，液态四氯化钛或液体氯化溶剂洗涤反应器排放气体来防止由氮固定产生的氯回收区的阻塞。 通过加热氯回收区来实现阻塞的去除。