Method for preparing multi-metal catalysts
    2.
    发明授权
    Method for preparing multi-metal catalysts 失效
    制备多金属催化剂的方法

    公开(公告)号:US5413984A

    公开(公告)日:1995-05-09

    申请号:US934515

    申请日:1992-10-13

    摘要: A method for preparing multi-metal catalysts including an active phase consisting of at least two metals, A and B, which are selected from groups VIII and IB of the periodic table, and a porous support. According to the method: firstly, at least a part of the porous support is impregnated with at least one precursor of metal A; secondly, activation is performed in a neutral or oxidizing atmosphere at a temperature of 120.degree.-800.degree. C. whereafter a treatment is carried out in a reduction medium at a temperature of 0.degree.-800.degree. C.; thirdly, at least a part of the support which was previously impregnated with the precursor of metal A is impregnated with at least one precursor of metal B; and fourthly, activation is performed in a neutral or oxidizing atmosphere at a temperature of 120.degree.-800.degree. C. The catalysts thereby obtained have improved stability, particularly when subjected to high temperatures, such as when they are used as post-combustion catalysts for exhaust gases from internal combustion engines, in which case metal A is platinum or palladium and metal B is platinum, palladium or rhodium, with the proviso that B is not the same as A.

    摘要翻译: PCT No.PCT / FR91 / 00969 Sec。 371日期:1992年10月13日 102(e)日期1992年10月13日PCT 1991年12月4日PCT PCT。 出版物WO92 / 11086 日期:1992年7月9日。一种制备多金属催化剂的方法,包括由至少两种选自元素周期表Ⅷ和IB的金属A和B组成的活性相和多孔载体。 根据该方法:首先,至少一部分多孔载体用至少一种金属A的前体浸渍; 其次,在中性或氧化性气氛中在120-800℃的温度下进行活化,然后在还原介质中在0-800℃的温度下进行处理。 第三,先前用金属A的前体浸渍的载体的至少一部分用至少一种金属B的前体浸渍; 第四,在中性或氧化性气氛中,在120-800℃的温度下进行活化。由此获得的催化剂具有改善的稳定性,特别是当经受高温时,例如当它们用作后燃催化剂 来自内燃机的废气,在这种情况下,金属A为铂或钯,金属B为铂,钯或铑,条件是B与A不同。

    Exhaust manifold with catalytic wall for internal-combustion engines
    5.
    发明授权
    Exhaust manifold with catalytic wall for internal-combustion engines 失效
    具有内燃机催化壁的排气歧管

    公开(公告)号:US5386696A

    公开(公告)日:1995-02-07

    申请号:US018151

    申请日:1993-02-16

    摘要: Exhaust manifold for catalytic treatment of the exhaust gases of an internal-combustion engine comprising a metallic outer tube (1) including a catalyst layer (4) in direct contact with the exhaust gases. According to the invention, the manifold also comprises at least one inner tubular element (2), substantially coaxial to said outer tube (1) and providing with the latter at least one space (3), the inner surface of said inner tube (2) being coated by said catalyst layer (4).

    摘要翻译: 用于催化处理内燃机的废气的排气歧管,其包括金属外管(1),所述金属外管(1)包括与废气直接接触的催化剂层(4)。 根据本发明,歧管还包括至少一个与所述外管(1)基本同轴的内部管状元件(2),并提供至少一个空间(3),所述内管(2)的内表面 )被所述催化剂层(4)涂覆。

    Composite catalyst for treatment of vehicular exhaust gases and process
for the preparation of the catalyst
    8.
    发明授权
    Composite catalyst for treatment of vehicular exhaust gases and process for the preparation of the catalyst 失效
    用于处理车辆废气的复合催化剂和催化剂的制备方法

    公开(公告)号:US4621071A

    公开(公告)日:1986-11-04

    申请号:US679449

    申请日:1984-12-07

    摘要: A composite active phase/support catalyst adapted for the treatment of internal combustion engine exhaust gases, the active phase of which comprising at least one metal from a first group comprising platinum, palladium, iridium, rhodium, ruthenium, rhenium, silver, gold or plurality thereof and at least one additional metal and the support therefor comprising binder/filler admixture, is facilely prepared by (i) intimately admixing the binder and filler support material with at least 50% by weight but less than all of said at least one first group metal, or precursor thereof, and/or of said at least one additional metal, (ii) forming the resulting admixture into catalyst shaped article, (iii) drying and optionally calcining said catalyst shaped article, (iv) incorporating the remainder of said at least one first group metal, or precursor thereof, and/or said at least one additional metal into said catalyst shaped article, and then (v) drying and activating the composite catalyst.

    摘要翻译: 一种适用于处理内燃机废气的复合活性相/载体催化剂,其活性相包含至少一种金属,所述第一组包括铂,钯,铱,铑,钌,铼,银,金或多种金属 并且至少一种另外的金属及其包含粘合剂/填料混合物的载体通过以下方式容易地制备:(i)将粘合剂和填料载体材料与至少50重量%但小于所有所述至少一个第一组 金属或其前体和/或所述至少一种另外的金属,(ii)将所形成的混合物形成催化剂成型制品,(iii)干燥和任选地煅烧所述催化剂成型制品,(iv)将剩余的所述的 至少一种第一组金属或其前体,和/或所述至少一种另外的金属加入到所述催化剂成型制品中,然后(v)干燥和活化复合催化剂。

    Activated nickel-containing electrode and its use particularly for water
electrolysis
    9.
    发明授权
    Activated nickel-containing electrode and its use particularly for water electrolysis 失效
    活性含镍电极及其特别用于水电解的用途

    公开(公告)号:US4363707A

    公开(公告)日:1982-12-14

    申请号:US160785

    申请日:1980-06-18

    CPC分类号: C25B11/0442 H01M4/98

    摘要: A low polarization electrode which is stable and safe to use, is manufactured by forming a layer of divided nickel or nickel alloy on an electricity-conducting substrate and thereafter sulfiding the surface of the resultant material. For example, a Raney nickel alloy is deposited on the substrate, the alloy metal is removed and the resultant material is sulfided.

    摘要翻译: 通过在导电性基板上形成分割的镍或镍合金层,然后硫化所得材料的表面,制造稳定且安全使用的低极化电极。 例如,在衬底上沉积阮内镍合金,去除合金金属,并将所得材料硫化。