Dehydrogenation of C.sub.3 and C.sub.4 hydrocarbons over an iron-based
catalyst
    8.
    发明授权
    Dehydrogenation of C.sub.3 and C.sub.4 hydrocarbons over an iron-based catalyst 失效
    C3和C4烃在铁基催化剂上脱氢

    公开(公告)号:US4613722A

    公开(公告)日:1986-09-23

    申请号:US758940

    申请日:1985-07-25

    摘要: Compositions of matter, including: a composition consisting of iron oxide and magnesium oxide; a composition comprising iron oxide, manganese oxide and magnesium oxide; a composition comprising a small amount of iron oxide and a larger amount of an oxide of a Lanthanum Series metal, particularly lanthanum and cerium; and a composition comprising iron oxide and niobium oxide. The above compositions are particularly useful as catalytic compositions for the conversion of C.sub.3 and C.sub.4 hydrocarbons to less saturated hydrocarbons, particularly ethylene and propylene and preferably ethylene, in the presence of steam. The steam substantially increases the active life of the catalytic composition, before regeneration is necessary, as well as significantly increasing the selectivity to ethylene. Limiting the amount of bound or fixed sulfur in the catalytic compositions also improves the catalysts.

    摘要翻译: 物质组成,包括:由氧化铁和氧化镁组成的组合物; 包含氧化铁,氧化锰和氧化镁的组合物; 包含少量氧化铁和较大量的镧系金属,特别是镧和铈的氧化物的组合物; 以及包含氧化铁和氧化铌的组合物。 上述组合物特别可用作用于在蒸汽存在下将C3和C4烃转化成较不饱和的烃,特别是乙烯和丙烯,优选乙烯的催化组合物。 在需要再生之前,蒸汽基本上增加了催化组合物的活性,并显着提高了对乙烯的选择性。 限制催化组合物中结合或固定硫的量也改善了催化剂。