利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

47 条记录 (耗时 0.023 秒)

    Low temperature oxidation using support molten salt catalysts
    12.
    发明授权
    Low temperature oxidation using support molten salt catalysts 失效
    使用支持熔盐催化剂进行低温氧化

    公开(公告)号：US06565820B1

    公开(公告)日：2003-05-20

    申请号：US09574766

    申请日：2000-05-19

    申请人： Alan W. Weimer ,  Peter J. Czerpak ,  Patrick M. Hilbert

    发明人： Alan W. Weimer ,  Peter J. Czerpak ,  Patrick M. Hilbert

    IPC分类号： C01B700

    CPC分类号： F23G7/07 ,  B01J35/12 ,  F23C10/00 ,  F23C13/00 ,  F23G5/30 ,  Y10S423/12

    摘要： Molten salt reactions are performed by supporting the molten salt on a particulate support and forming a fluidized bed of the supported salt particles. The method is particularly suitable for combusting hydrocarbon fuels at reduced temperatures, so that the formation NOx species is reduced. When certain preferred salts are used, such as alkali metal carbonates, sulfur and halide species can be captured by the molten salt, thereby reducing SOx and HCl emissions.

    摘要翻译： 通过将熔融盐支撑在颗粒载体上并形成负载盐颗粒的流化床来进行熔盐反应。 该方法特别适于在降低的温度下燃烧碳氢化合物燃料，从而减少形成的NOx物质。 当使用某些优选的盐时，例如碱金属碳酸盐，硫和卤化物物质可被熔融盐捕获，从而减少SOx和HCl排放。

    Method to produce a transition metal carbide from a partially reduced transition metal compound
    13.
    发明授权
    Method to produce a transition metal carbide from a partially reduced transition metal compound 失效
    从部分还原的过渡金属化合物制备过渡金属碳化物的方法

    公开(公告)号：US06495115B1

    公开(公告)日：2002-12-17

    申请号：US08703153

    申请日：1996-08-29

    申请人： Stephen D. Dunmead ,  Kevin J. Nilsen ,  Gabrielle R. Lasher ,  Joseph F. Repman ,  Hobart A. Barker ,  Alan W. Weimer

    发明人： Stephen D. Dunmead ,  Kevin J. Nilsen ,  Gabrielle R. Lasher ,  Joseph F. Repman ,  Hobart A. Barker ,  Alan W. Weimer

    IPC分类号： C01B3130

    CPC分类号： C01B32/949 ,  C01B32/914 ,  C01P2002/72 ,  C01P2004/62 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/80

    摘要： A transition metal carbide is formed from a precursor mixture comprising at least one of the group consisting of: a transition metal, a transition metal carbide and a transition metal oxide. The precursor mixture may contain the desired transition metal carbide (e.g., WC), but if the desired transition metal carbide is present in the precursor mixture, there is necessarily a significant amount of another compound such as a transition metal oxide, undesired carbide (e.g., W2C) or transition metal. The method involves forming an admixture by mixing the precursor mixture with a sufficient amount of carbon to carburize the precursor mixture to the transition metal carbide and reacting the admixture in an inert or reducing atmosphere at a temperature for a time sufficient to convert the admixture to the transition metal carbide, wherein the admixture is reacted in the presence of a means to enhance transfer of heat into the admixture, an inert or reducing gas flowing through at least a portion of the admixture or combination thereof.

    摘要翻译： 过渡金属碳化物由包含过渡金属，过渡金属碳化物和过渡金属氧化物中的至少一种的前体混合物形成。 前体混合物可以含有所需的过渡金属碳化物（例如WC），但是如果所需的过渡金属碳化物存在于前体混合物中，则必须有大量的其它化合物，例如过渡金属氧化物，不期望的碳化物（例如 ，W2C）或过渡金属。 该方法包括通过将前体混合物与足够量的碳混合来形成混合物，以将前体混合物渗碳到过渡金属碳化物，并将该混合物在惰性或还原性气氛中在足以将混合物转化为 过渡金属碳化物，其中所述混合物在增加热量进入所述混合物的手段的存在下反应，惰性或还原气体流过所述混合物的至少一部分或其组合。

    Method for making submicrometer transition metal carbonitrides
    14.
    发明授权
    Method for making submicrometer transition metal carbonitrides 失效
    亚微米过渡金属碳氮化物的制备方法

    公开(公告)号：US5756410A

    公开(公告)日：1998-05-26

    申请号：US807165

    申请日：1997-02-27

    申请人： Stephen D. Dunmead ,  Alan W. Weimer

    发明人： Stephen D. Dunmead ,  Alan W. Weimer

    IPC分类号： C04B35/56 ,  C01B21/082 ,  C01G41/00 ,  C04B35/58 ,  C01B21/00

    CPC分类号： B82Y30/00 ,  C01B21/0828 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64

    摘要： A submicrometer transition metal carbonitride is produced having the formula: M.sub.a M'.sub.b M".sub.(1-a-b) (C.sub.1-x) N.sub.x).sub.z wherein M is Ti, Zr or Hf; M' is V, Nb or Ta; M" is Cr, Mo or W; a ranges from 0 to 1; b ranges from 0 to 1 with the proviso that (a +b) is less than or equal to 1; x ranges from about 0.02 to about 0.95 and z ranges from about 0.9 to about 2. The transition metal carbonitride is produced by mixing (a) a transition metal oxide source of a transition metal in the above formula and (b) a carbon source such as carbon black. This mixture is heated at a rate of between about 100K/sec to about 100,000,000K/sec in a nitrogen containing non-oxidizing gas such as nitrogen or nitrogen mixed with argon to an elevated temperature that makes carbothermal reduction of the transition metal oxide source thermodynamically favorable for a residence time sufficient to convert the transition metal oxide source into at least one product selected from the group consisting of (i) a transition metal carbonitride and (ii) a transition metal carbonitride precursor. The product may be exposed to a finishing step involving heating the product to a temperature less than the elevated temperature in a finishing atmosphere such as nitrogen, hydrogen, inert gas or combinations thereof to form submicrometer carbonitrides of higher purity or different stoichiometry.

    摘要翻译： 制备亚微米过渡金属碳氮化物，其具有下式：MaM'bM“（1-a-b）（C1-x）Nx）z，其中M是Ti，Zr或Hf; M'为V，Nb或Ta; M“是Cr，Mo或W; a范围从0到1; b的范围为0至1，条件是（a + b）小于或等于1; x的范围为约0.02至约0.95，z的范围为约0.9至约2.过渡金属碳氮化物通过将（a）过渡金属的过渡金属氧化物源与上述式（b）中的碳源 作为炭黑。 将这种混合物在氮气或氮气混合的含氮非氧化性气体的氮气中以约100K /秒至约100,000,000K /秒的速率加热至高温，从而使过渡金属氧化物源热力学地进行碳热还原 有利于将过渡金属氧化物源转化成选自（i）过渡金属碳氮化物和（ii）过渡金属碳氮化物前体中的至少一种产物的停留时间。 该产品可能暴露于整理步骤，包括在最终气氛例如氮气，氢气，惰性气体或其组合中将产品加热至低于升高温度的温度，以形成更高纯度或不同化学计量的亚微米碳氮化物。