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    Moving bed process for carbothermally synthesizing nonoxide ceramic powders
    3.
    发明授权
    Moving bed process for carbothermally synthesizing nonoxide ceramic powders 失效
    碳热合成非氧化物陶瓷粉末的移动床工艺

    公开(公告)号：US5607297A

    公开(公告)日：1997-03-04

    申请号：US296051

    申请日：1994-08-24

    申请人： John P. Henley ,  Gene A. Cochran ,  David A. Dunn ,  Glenn A. Eisman ,  Alan W. Weimer

    发明人： John P. Henley ,  Gene A. Cochran ,  David A. Dunn ,  Glenn A. Eisman ,  Alan W. Weimer

    IPC分类号： B01J8/08 ,  C01B20060101 ,  C01B21/06 ,  C01B21/068 ,  C01B21/072 ,  C01B21/076 ,  C01B31/30 ,  C01B31/36 ,  F27D1/08

    CPC分类号： C01B21/0726 ,  B01J8/087 ,  C01B21/06 ,  C01B21/0685 ,  C01B31/30 ,  C01B31/36 ,  C01B21/0617 ,  C01B21/062 ,  C01B21/076 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/80

    摘要： Carbothermally reduce a metal oxide to its corresponding metal nitride or metal carbide powder in a vertical gravity flow reactor by adding precursor pellets containing the metal oxide, a thermally decomposed binder material and carbon or a source of carbon directly to a heated reaction zone within the reactor. The pellets form a pellet bed, the top of which must be maintained within the heated reaction zone. The binder material is a blend of wheat and corn starches, optionally in conjunction with another binder such as melamine. The binder material thermally decomposes to a carbonaceous residue which functions both as an additional source of carbon and as a binder for the precursor pellets. The reactor may be modified by adding an internal vent line to remove volatile materials from the heated reaction zone before they have an opportunity to condense on internal reactor surfaces.

    摘要翻译： 通过将含有金属氧化物，热分解的粘合剂材料和碳或碳源的前体颗粒直接加入反应器内的加热反应区，将垂直重力流反应器中的金属氧化物碳氢化合物还原成其相应的金属氮化物或金属碳化物粉末 。 颗粒形成颗粒床，其顶部必须保持在加热的反应区内。 粘合剂材料是小麦和玉米淀粉的混合物，任选地与另一种粘合剂如三聚氰胺结合。 粘合剂材料热分解成碳素残渣，其既作为附加碳源又用作前体颗粒的粘合剂。 在反应器有机会在内部反应器表面冷凝之前，可以通过添加内部通风管线来从加热的反应区域中除去挥发性物质来改变反应器。

    Moving bed process for carbothermally synthesizing nonoxide ceramic powders
    4.
    发明授权
    Moving bed process for carbothermally synthesizing nonoxide ceramic powders 失效
    碳热合成非氧化物陶瓷粉末的移动床工艺

    公开(公告)号：US5370854A

    公开(公告)日：1994-12-06

    申请号：US1990

    申请日：1993-01-08

    申请人： John P. Henley ,  Gene A. Cochran ,  David A. Dunn ,  Glenn A. Eisman ,  Alan W. Weimer

    发明人： John P. Henley ,  Gene A. Cochran ,  David A. Dunn ,  Glenn A. Eisman ,  Alan W. Weimer

    IPC分类号： B01J8/08 ,  C01B20060101 ,  C01B21/06 ,  C01B21/068 ,  C01B21/072 ,  C01B21/076 ,  C01B31/30 ,  C01B31/36

    CPC分类号： C01B21/0726 ,  B01J8/087 ,  C01B21/06 ,  C01B21/0685 ,  C01B31/30 ,  C01B31/36 ,  C01B21/0617 ,  C01B21/062 ,  C01B21/076 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/80

    摘要： Carbothermally reduce a metal oxide to its corresponding metal nitride or metal carbide powder in a vertical gravity flow reactor by adding precursor pellets containing the metal oxide, a thermally decomposed binder material and carbon or a source of carbon directly to a heated reaction zone within the reactor. The pellets form a pellet bed, the top of which must be maintained within the heated reaction zone. The binder material is a blend of wheat and corn starches, optionally in conjunction with another binder such as melamine. The binder material thermally decomposes to a carbonaceous residue which functions both as an additional source of carbon and as a binder for the precursor pellets. The reactor may be modified by adding an internal vent line to remove volatile materials from the heated reaction zone before they have an opportunity to condense on internal reactor surfaces.

    摘要翻译： 通过将含有金属氧化物，热分解的粘合剂材料和碳或碳源的前体颗粒直接加入反应器内的加热反应区，将垂直重力流反应器中的金属氧化物碳氢化合物还原成其相应的金属氮化物或金属碳化物粉末 。 颗粒形成颗粒床，其顶部必须保持在加热的反应区内。 粘合剂材料是小麦和玉米淀粉的混合物，任选地与另一种粘合剂如三聚氰胺结合。 粘合剂材料热分解成碳素残渣，其既作为附加碳源又用作前体颗粒的粘合剂。 在反应器有机会在内部反应器表面冷凝之前，可以通过添加内部通风管线来从加热的反应区域中除去挥发性物质来改变反应器。

    Method to produce a transition metal carbide from a partially reduced transition metal compound
    6.
    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：US5942204A

    公开(公告)日：1999-08-24

    申请号：US967965

    申请日：1997-11-12

    申请人： Stephen D. Dunmead ,  Hobart A. Barker ,  John P. Henley ,  Pat J. DeLuca ,  Tom J. Bunnelle ,  Joe F. Repman ,  Daniel F. Carroll ,  Stephen A. Anderson

    发明人： Stephen D. Dunmead ,  Hobart A. Barker ,  John P. Henley ,  Pat J. DeLuca ,  Tom J. Bunnelle ,  Joe F. Repman ,  Daniel F. Carroll ,  Stephen A. Anderson

    IPC分类号： C01B31/30 ,  C01B31/34

    CPC分类号： C01B31/303 ,  C01B31/305 ,  C01B31/34 ,  C01P2006/12 ,  C01P2006/80

    摘要： A transition metal carbide (e.g., WC) is prepared by the following steps. A carbon-precursor mixture is formed by mixing a precursor comprised of (i) a transition metal oxide (e.g., WO.sub.x) and (ii) a material selected from the group consisting of: a transition metal (e.g., W); a transition metal carbide (e.g., WC) and a substoichiometric carbide (W.sub.2 C), in the presence of a source of carbon (e.g., carbon black) in an amount sufficient to form a reduced mixture comprised of the transition metal carbide and substoichiometric transition metal carbide, wherein the amount of the transition metal oxide and transition metal is essentially zero in said reduced mixture. The carbon-precursor mixture is heated in a reducing atmosphere (e.g., 5 percent hydrogen in argon) to a reducing temperature and for a time sufficient to produce the reduced mixture. The reduced mixture is milled in the presence of a source of carbon in an amount sufficient to carburize the substoichiometric transition metal carbide to form the transition metal upon heating in a reducing atmosphere. Finally, the milled reduced mixture is heated in a reducing atmosphere to a carburizing temperature that is greater than the reducing temperature for a time sufficient to carburize the substoichiometric transition metal carbide to form the transition metal carbide of this invention (e.g., WC).

    摘要翻译： 通过以下步骤制备过渡金属碳化物（例如WC）。 通过混合由（i）过渡金属氧化物（例如WOx）和（ii）选自以下的材料组成的前体形成碳前体混合物：过渡金属（例如W）; 在碳源（例如炭黑）存在下，过渡金属碳化物（例如WC）和亚化学计量碳化物（W2C）的量足以形成由过渡金属碳化物和亚化学计量过渡金属组成的还原混合物 碳化物，其中过渡金属氧化物和过渡金属的量在所述还原的混合物中基本为零。 将碳前体混合物在还原气氛（例如氩气中的5％氢气）中加热至还原温度并持续足以产生还原混合物的时间。 将还原的混合物在碳源存在下研磨，其量足以使亚化学计量过渡金属碳化物渗碳以在还原气氛中加热时形成过渡金属。 最后，将研磨后的还原混合物在还原气氛中加热至大于还原温度的渗碳温度足以使亚化学计量过渡金属碳化物渗碳形成本发明的过渡金属碳化物（例如WC）的时间。

    High yield manufacturing process for silicon carbide
    7.
    发明授权
    High yield manufacturing process for silicon carbide 失效
    高产量的碳化硅制造工艺

    公开(公告)号：US5190737A

    公开(公告)日：1993-03-02

    申请号：US693507

    申请日：1991-04-30

    申请人： Alan W. Weimer ,  Raymond P. Roach ,  John P. Henley

    发明人： Alan W. Weimer ,  Raymond P. Roach ,  John P. Henley

    IPC分类号： B01J8/00 ,  B01J8/12 ,  C01B31/36

    CPC分类号： C01B31/36 ,  B01J8/0095 ,  B01J8/12 ,  B82Y30/00 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/80

    摘要： A process for preparing silicon carbide by carbothermal reduction which includes transporting, in a gaseous medium, a particulate reactive mixture of a silica source and a carbon source through a reaction zone. The heating rate of the atmosphere within the reaction zone is such that substantially all of the reactive mixture is heated at a heating rate of at least about 100.degree. C./second until an elevated temperature of at least 1800.degree. C. is reached. Either (1) carbon monoxide is added to the reaction zone or (2) a carbon monoxide level in the reaction is achieved in order to provide at least about 30 mole percent of the gases exiting the reaction zone to achieve a higher yield of silicon carbide.

    摘要翻译： 一种通过碳热还原制备碳化硅的方法，其包括在气态介质中通过反应区输送二氧化硅源和碳源的颗粒反应性混合物。 反应区内的气氛的加热速率使得基本上所有的反应混合物以至少约100℃/秒的加热速率被加热直到达到至少1800℃的升高的温度。 （1）将一氧化碳加入到反应区中，或（2）达到反应中的一氧化碳水平，以便提供离开反应区的至少约30摩尔％的气体以获得更高的碳化硅产率 。

    Two-stage coal gasification process
    8.
    发明授权
    Two-stage coal gasification process 失效
    两阶段煤气化过程

    公开(公告)号：US4872886A

    公开(公告)日：1989-10-10

    申请号：US178035

    申请日：1988-04-05

    申请人： John P. Henley ,  Stanley R. Pearson ,  Bruce C. Peters ,  Larry L. LaFitte

    发明人： John P. Henley ,  Stanley R. Pearson ,  Bruce C. Peters ,  Larry L. LaFitte

    IPC分类号： C10J3/46 ,  C10J3/48

    CPC分类号： C10J3/721 ,  C10J3/485 ,  C10J2200/152 ,  Y02P20/124 ,  Y02P20/129 ,  Y10S48/07

    摘要： A two-stage upflow process for coal gasification and an apparatus useful therefor. An oxygen-containing gas and a first increment of a coal-in-water slurry are ignited in a horizontal fired slagging reactor by means of horizontal coaxial juxtaposed burner nozzles mounted in the reactor, thereby converting the oxygen, the coal, and the water into steam and gaseous combustion products. The discharge from the fired reactor is contacted overhead with a second increment of coal-water slurry in a vertical unfired heat-recovery unit connected to the upper end of the reactor. The heat evolved in the reactor is used in the heat recovery unit to convert the second increment of coal-water slurry into more steam, char and synthesis gas. The gas effluent is separated from the solid char, and synthesis gas is passed into a fire-tube boiler to recover heat and the cooled product gas is recovered as the desired fuel-rich product. The solid char is reslurried and recycled to the fired reactor 3 for further combustion.