Ni catalysts and methods for alkane dehydrogenation
    31.
    发明授权
    Ni catalysts and methods for alkane dehydrogenation 有权
    镍催化剂和烷烃脱氢方法

    公开(公告)号:US06777371B2

    公开(公告)日:2004-08-17

    申请号:US09849378

    申请日:2001-05-04

    申请人: Yumin Liu

    发明人: Yumin Liu

    IPC分类号: B01J23755

    摘要: Catalysts and methods for alkane oxydehydrogenation are disclosed. The catalysts of the invention generally comprise (i) nickel or a nickel-containing compound and (ii) at least one or more of titanium (Ti), tantalum (Ta), niobium (Nb), hafnium (Hf), tungsten (W), yttrium (Y), zinc (Zn), zirconium (Zr), or aluminum (Al), or a compound containing one or more of such element(s). In preferred embodiments, the catalyst is a supported catalyst, the alkane is selected from the group consisting of ethane, propane, isobutane, n-butane and ethyl chloride, molecular oxygen is co-fed with the alkane to a reaction zone maintained at a temperature ranging from about 250° C. to about 350° C., and the ethane is oxidatively dehydrogenated to form the corresponding alkene with an alkane conversion of at least about 10% and an alkene selectivity of at least about 70%.

    摘要翻译: 公开了烷烃氧化脱氢的催化剂和方法。 本发明的催化剂通常包括(i)镍或含镍化合物和(ii)钛(Ti),钽(Ta),铌(Nb),铪(Hf),钨(W)中的至少一种或多种 ),钇(Y),锌(Zn),锆(Zr)或铝(Al),或含有这些元素中的一种或多种的化合物。 在优选的实施方案中,催化剂是负载催化剂,烷烃选自乙烷,丙烷,异丁烷,正丁烷和乙基氯,分子氧与烷烃共同进料至维持在温度 范围为约250℃至约350℃,并且乙烷被氧化脱氢以形成相应的烯烃,烷烃转化率为至少约10%,烯烃选择性为至少约70%。

    Method for preparing carbon nanostructures
    32.
    发明申请
    Method for preparing carbon nanostructures 审中-公开
    制备碳纳米结构的方法

    公开(公告)号:US20030099592A1

    公开(公告)日:2003-05-29

    申请号:US10261340

    申请日:2002-09-30

    IPC分类号: C01B031/02

    摘要: A method for preparing nanostructures comprised of a primary layered non-cylindrical nanostructure support and at least one type of secondary substantially graphitic nanostructure grown therefrom. Both the primary layered nanostructure support and the layered substantially graphitic secondary nanostructure are substantially crystalline, wherein the secondary nanostructure, which will preferably be carbon, has a smaller diameter than the primary non-cylindrical nanostructure.

    摘要翻译: 一种制备纳米结构的方法,其由初级分层非圆柱形纳米结构载体和由其生长的至少一种基本上基本上的石墨纳米结构构成。 主层状纳米结构载体和层状基本上石墨二次纳米结构都基本上是结晶的,其中优选为碳的次级纳米结构具有比初级非圆柱形纳米结构小的直径。

    Ni catalysts and methods for alkane dehydrogenation
    33.
    发明授权
    Ni catalysts and methods for alkane dehydrogenation 有权
    镍催化剂和烷烃脱氢方法

    公开(公告)号:US06417422B1

    公开(公告)日:2002-07-09

    申请号:US09510458

    申请日:2000-02-22

    申请人: Yumin Liu

    发明人: Yumin Liu

    IPC分类号: C07C5327

    摘要: Catalysts and method for alkane dehydrogenation are disclosed. The catalysts of the invention generally comprise (i) nickel or a nickel-containing compound and (ii) at least one or more of titanium (Ti), tantalum (Ta), niobium (Nb), hafnium (Hf), tungsten (W), yttrium (Y), zinc (Zn), zirconium (Zr), or aluminum (Al), or a compound containing one or more such element(s). In preferred embodiments, the catalyst is a supported catalyst, the alkane or substituted alkane is selected from the group consisting of ethane, propane, isobutane, butane and ethyl chloride, molecular oxygen is co-fed with the alkane or substituted alkane to a reaction maintained at a temperature ranging from about 250° C. and about 350° C., and the ethane is oxidatively dehydrogenated to form the corresponding alkene with an alkene conversion of at least about 10% and an alkene selectivity of at least about 70%.

    摘要翻译: 公开了烷烃脱氢的催化剂和方法。 本发明的催化剂通常包括(i)镍或含镍化合物和(ii)钛(Ti),钽(Ta),铌(Nb),铪(Hf),钨(W)中的至少一种或多种 ),钇(Y),锌(Zn),锆(Zr)或铝(Al),或含有一种或多种这样的元素的化合物。 在优选的实施方案中,催化剂是负载型催化剂,烷烃或取代烷烃选自乙烷,丙烷,异丁烷,丁烷和乙基氯,分子氧与烷烃或取代烷烃共同进料至反应维持 在约250℃和约350℃的温度下,乙烷被氧化脱氢以形成相应的烯烃,烯烃转化率为至少约10%,烯烃选择性为至少约70%。