Process for oxidation of ammonia
    23.
    发明授权
    Process for oxidation of ammonia 失效
    氨氧化工艺

    公开(公告)号:US3931391A

    公开(公告)日:1976-01-06

    申请号:US468988

    申请日:1974-05-10

    摘要: Catalysts suitable for the oxidation of ammonia to nitrogen oxides which are suitable to produce nitric acid are prepared by doping cobalt oxide, preferably Co.sub.3 O.sub.4 with 0.1-10 atoms %, preferably 0.5-3 atom % of lithium. In a given case, there is added a mold assist agent to form tablets, spheres, extruded pressed strands or honeycombs. The product is calcined in air or an oxygen stream at 300.degree.-700.degree.C, preferably 400.degree.-600.degree.C and subsequently tempered at 700.degree.-900.degree.C in a reactive gas mixture of air and 8-10 vol. % ammonia to increase the form stability.

    摘要翻译: 通过掺杂氧化钴,优选具有0.1-10原子%,优选0.5-3原子%的锂的Co 3 O 4,制备适于氧化氨至适于生产硝酸的氮氧化物的催化剂。 在给定的情况下,加入模具助剂以形成片剂,球体,挤出的挤压的丝束或蜂窝。 产物在空气或氧气流中在300〜700℃,优选400〜-600℃下煅烧,随后在空气和8〜10体积的反应性气体混合物中于700-900℃回火。 %氨增加形式稳定性。

    Catalyst for purifying exhaust gases from internal combustion engines
and method of making the catalyst
    24.
    发明授权
    Catalyst for purifying exhaust gases from internal combustion engines and method of making the catalyst 失效
    用于从内燃机中净化排气的催化剂及制备催化剂的方法

    公开(公告)号:US5073532A

    公开(公告)日:1991-12-17

    申请号:US559095

    申请日:1990-07-30

    摘要: A catalyst is described made of active aluminum oxide with additives of CeO.sub.2, ZrO.sub.2, and Fe.sub.2 O.sub.3 and/or NiO as carrier and an active phase, applied thereon and consisting of platinum, palladium and/or rhodium, and a base metal, which is obtainable by impregnation of the additive-containing carrier with solutions of salts of the metals for the active phase, wherein the base metal of the active phase is cerium, by drying, and by heating to 250.degree. to 650.degree. C. The catalyst can be used for the oxidation and/or reduction of exhaust gases from internal combustion engines.

    摘要翻译: 催化剂由具有CeO 2,ZrO 2和Fe 2 O 3和/或NiO作为载体的添加剂和施加在其上并由铂,钯和/或铑和贱金属组成的活性相的活性氧化铝制成,其可获得 通过用活性相的金属盐溶液浸渍含添加剂的载体,其中活性相的贱金属是铈,通过干燥,加热至250〜650℃。可以使用催化剂 用于氧化和/或还原来自内燃机的废气。