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9 条记录 (耗时 0.056 秒)

    Process of oxidizing aliphatic hydrocarbons employing a molybdate catalyst composition
    3.
    发明授权
    Process of oxidizing aliphatic hydrocarbons employing a molybdate catalyst composition 失效
    使用钼酸盐催化剂组合物氧化脂族烃的方法

    公开(公告)号：US5258347A

    公开(公告)日：1993-11-02

    申请号：US890972

    申请日：1992-05-29

    申请人： Bijan Khazai ,  Craig B. Murchison ,  G. Edwin Vrieland

    发明人： Bijan Khazai ,  Craig B. Murchison ,  G. Edwin Vrieland

    IPC分类号： B01J23/28 ,  C07C5/42 ,  B01J23/00

    CPC分类号： C07C5/42 ,  B01J23/28 ,  C07C2521/04 ,  C07C2521/10 ,  C07C2523/04 ,  C07C2523/28 ,  Y10S502/524

    摘要： A process for the production of olefins and diolefins, such as 1,3-butadiene, comprising contacting an aliphatic hydrocarbon, such as butane, with a heterogeneous catalyst composition containing reactive oxygen under reaction conditions such that a more highly unsaturated aliphatic hydrocarbon is selectively formed in a high productivity. The catalyst is a composition comprising (a) a support component of magnesia and alumina and/or magnesium aluminate spinel, and (b) a catalyst component of magnesia, an oxide of molybdenum, a Group IA metal oxide promoter, and optionally vanadium oxide. Catalysts of high surface area and high attrition resistance are claimed.

    摘要翻译： 一种生产烯烃和二烯烃如1,3-丁二烯的方法，包括在反应条件下使脂族烃如丁烷与含有活性氧的非均相催化剂组合物接触，使得选择性地形成更高度不饱和的脂族烃 在高生产率。 催化剂是包含（a）氧化镁和/或铝酸镁尖晶石的载体组分的组合物，和（b）氧化镁的催化剂组分，钼的氧化物，第IA族金属氧化物促进剂和任选的氧化钒。 要求具有高表面积和高耐磨性的催化剂。

    Process for producing metal borides using finely comminuted mixture of reactants
    4.
    发明授权
    Process for producing metal borides using finely comminuted mixture of reactants 失效
    使用细粉碎的反应物混合物制备金属硼化物的方法

    公开(公告)号：US5160698A

    公开(公告)日：1992-11-03

    申请号：US724618

    申请日：1991-07-02

    申请人： Bijan Khazai ,  William G. Moore

    发明人： Bijan Khazai ,  William G. Moore

    IPC分类号： C01B35/04

    CPC分类号： C01B35/04

    摘要： A mixture of reactants having a particle size of about 200 microns is heated to convert said mixture comprising a metal compound, carbon, and a boron source to a metal boride having an average particle size of about 0.05 to about 0.5 micron. Said metal compound is one which can be converted to the corresponding metal boride by reaction with carbon and a boron source under controlled conditions of time and temperature.

    摘要翻译： 将具有约200微米粒度的反应物混合物加热，将包含金属化合物，碳和硼源的所述混合物转化成平均粒径为约0.05至约0.5微米的金属硼化物。 所述金属化合物是通过在时间和温度的受控条件下与碳和硼源反应而转化为相应的金属硼化物的化合物。

    Self-regulating polymer composite heater
    6.
    发明授权
    Self-regulating polymer composite heater 失效
    自调节聚合物复合加热器

    公开(公告)号：US5902518A

    公开(公告)日：1999-05-11

    申请号：US902122

    申请日：1997-07-29

    申请人： Bijan Khazai ,  George M. Nichols

    发明人： Bijan Khazai ,  George M. Nichols

    IPC分类号： H05B3/14 ,  H01B1/06

    CPC分类号： H05B3/146

    摘要： A polymer matrix type heater filled with a conductive particulate moiety is disclosed wherein the preferable polymer is a polyurethane shape-memory polymer and the preferable filler is spherical thermal carbon black particles. Optional insulating fillers may be added to adjust the thermal and electrical properties of the heater. The resulting self-regulating heater has fast heat-up, sharp turnoff, and negligible temperature fluctuation.

    摘要翻译： 公开了一种填充有导电颗粒部分的聚合物基质型加热器，其中优选的聚合物是聚氨酯形状记忆聚合物，并且优选的填料是球形热炭黑颗粒。 可以添加可选的绝缘填料以调节加热器的热和电特性。 所产生的自调节加热器具有快速的加热，急剧的关闭和可忽略的温度波动。

    Composition and method for producing boron carbide/titanium diboride composite ceramic powders using a boron carbide substrate
    7.
    发明授权
    Composition and method for producing boron carbide/titanium diboride composite ceramic powders using a boron carbide substrate 失效
    使用碳化硼基板制造碳化硼/二硼化钛复合陶瓷粉末的组合物和方法

    公开(公告)号：US5342811A

    公开(公告)日：1994-08-30

    申请号：US698435

    申请日：1991-05-10

    申请人： Bijan Khazai ,  William G. Moore

    发明人： Bijan Khazai ,  William G. Moore

    IPC分类号： C04B35/563 ,  C04B35/58 ,  C04B35/56

    CPC分类号： C04B35/58071 ,  C04B35/563 ,  C04B35/645 ,  C04B35/65

    摘要： A composition and method for producing boron carbide/titanium diboride composite ceramic powders is disclosed. The process comprises the ordered steps of (a) intimately mixing as reactants boron carbide and a titanium source, such that the average reactant particle size is less than about 20 microns and substantially all discrete reactant areas are less than about 50 microns, and (b) reacting the product of step (a) under conditions sufficient to produce a boron carbide/titanium diboride composite ceramic powder wherein at least a portion of the boron carbide particles form substrates to which at least a portion of the titanium diboride particles are attached. The method can be used to produce a composite ceramic powder having boron carbide and titanium diboride particles less than about 20 microns in diameter. This powder can then be densified using known densification techniques to form a densified part wherein the titanium diboride grains have an average size of less than about 20 microns in diameter and the boron carbide grains having an average size of less than about 50 microns.

    摘要翻译： 公开了一种用于生产碳化硼/二硼化钛复合陶瓷粉末的组合物和方法。 该方法包括（a）作为反应物碳化硼和钛源充分混合的有序步骤，使得平均反应物粒度小于约20微米，并且基本上所有离散的反应物区域小于约50微米，和（b ）在足以产生碳化硼/二硼化钛复合陶瓷粉末的条件下使步骤（a）的产物反应，其中至少一部分碳化硼颗粒形成至少部分二硼化钛颗粒所附着的基底。 该方法可用于生产具有直径小于约20微米的碳化硼和二硼化钛颗粒的复合陶瓷粉末。 然后可以使用已知的致密化技术将该粉末致密化以形成致密化部分，其中二硼化钛颗粒的直径平均尺寸小于约20微米，碳化硼颗粒的平均尺寸小于约50微米。

    Composition and method for producing boron carbide/titanium diboride composite ceramic powders using a boron carbide substrate
    9.
    发明授权
    Composition and method for producing boron carbide/titanium diboride composite ceramic powders using a boron carbide substrate 失效
    使用碳硼化物基板生产碳硼碳/二氧化钛复合陶瓷粉末的组合物和方法

    公开(公告)号：US5108962A

    公开(公告)日：1992-04-28

    申请号：US198969

    申请日：1988-05-26

    申请人： Bijan Khazai ,  William G. Moore

    发明人： Bijan Khazai ,  William G. Moore

    IPC分类号： C04B35/563 ,  C04B35/58

    CPC分类号： C04B35/58071 ,  C04B35/563 ,  C04B35/645 ,  C04B35/65

    摘要： A composition and method for producing boron carbide/titanium diboride composite ceramic powders is disclosed. The process comprises the ordered steps of (a) intimately mixing as reactants boron carbide and a titanium source, such that the average reactant particle size is less than about 20 microns and substantially all discrete reactant areas are less than about 50 microns, and (b) reacting the product of step (a) under conditions sufficient to produce a boron carbide/titanium diboride composite ceramic powder wherein at least a portion of the boron carbide particles form substrates to which at least a portion of the titanium diboride particles are attached. The method can be used to produce a composite ceramic powder having boron carbide and titanium diboride particles less than about 20 microns in diameter. This powder can then be densified using known densification techniques to form a densified part wherein the titanium diboride grains have an average size of less than about 20 microns in diameter and the boron carbide grains having an average size of less than about 50 microns. Because of the uniformity of dispersion that can result, the densified part shows a microstructure that is also very uniform in distribution of boron carbide and titanium diboride.