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    • 6. 发明授权
    • High surface purity heat transfer solids for high temperature fluidized
bed reactions
    • 高表面纯度的传热固体用于高温流化床反应
    • US5360778A
    • 1994-11-01
    • US60378
    • 1993-05-11
    • Stephen M. DavisLeRoy R. ClavennaGeoffrey R. SayRocco A. Fiato
    • Stephen M. DavisLeRoy R. ClavennaGeoffrey R. SayRocco A. Fiato
    • B01J8/00C01B3/44C01B13/14C01F7/02C01F7/46B01J20/02B01J20/30B01J21/02
    • C01B3/44B01J8/008C01B13/145C01F7/02C01F7/46C01P2002/85C01P2004/50C01P2004/61C01P2006/80Y02P20/52
    • High surface purity heat transfer solids are formed, suitably by washing and treating particulate refractory inorganic solids, notably alumina, which contains as impurities up to about 0.5 wt. % silicon and/or up to about 500 wppm boron, with an acid, or dilute acid solution sufficient to reduce the concentration of silicon and boron in the outer peripheral surface layer of the particles, e.g., as measured inwardly toward the center of a particle to a depth of about 50 .ANG. using X-ray photoelectron spectroscopy, to no greater than about 5 atom percent silicon and boron, preferably about 2 atom percent silicon and boron, based on the total number of cations within said outer peripheral surface layer, thereby reducing the tendency of said particles to sinter and agglomerate in the conversion of said hydrocarbon to hydrogen and carbon monoxide in a fluidized bed synthesis gas operation vis-a-vis particles otherwise similar except that the particles are not treated with the acid. The tendency of the particles to sinter and agglomerate is further reduced by the additional removal of sodium, iron, calcium, and titanium impurities from the outer peripheral surface layer of the particles. Preferably the latter named impurities, or impurities other than silicon and boron, are reduced to a concentration below about 20 atom %, more preferably to a concentration below about 15 atom %, in the outer surface layer of the particles.
    • 适当地通过洗涤和处理颗粒耐火无机固体,特别是氧化铝来形成高表面纯度的热传递固体,其含有高达约0.5wt。 %硅和/或高达约500wppm的硼,与酸或稀酸溶液相比足以降低颗粒外周表面层中硅和硼的浓度,例如向内朝向颗粒中心测量 基于所述外周表面层中的阳离子总数,使用X射线光电子能谱测量至约50AHZ的深度,不大于约5原子%的硅和硼,优选约2原子%的硅和硼,由此 降低了所述颗粒在流化床合成气操作中将所述烃转化为氢气和一氧化碳的过程中所述颗粒烧结和附聚的倾向,除了颗粒不用酸处理之外,颗粒否则相似。 通过从颗粒的外周表面层另外去除钠,铁,钙和钛杂质,进一步降低了颗粒烧结和附聚的倾向。 优选地,后者称为杂质或除了硅和硼之外的杂质,在颗粒的外表面层中被还原成低于约20原子%,更优选低于约15原子%的浓度。
    • 7. 发明授权
    • Process for converting cyclic urea to corresponding diamine in a gas
treating system
    • 在气体处理系统中将环脲转化为相应的二胺的方法
    • US4282194A
    • 1981-08-04
    • US122589
    • 1980-02-19
    • Geoffrey R. SayJames R. Hays, Sr.Jagannathan N. IyengarBarbara A. Hacker
    • Geoffrey R. SayJames R. Hays, Sr.Jagannathan N. IyengarBarbara A. Hacker
    • B01D53/14B01D53/52B01D53/34
    • B01D53/1425B01D53/1456B01D53/1493B01D53/526Y02C10/06
    • Acidic gases such as carbon dioxide are removed from a normally gaseous mixture including the acidic component by contacting the gaseous mixture in an absorption zone with an acid absorbing scrubbing solution comprising a basic alkali metal compound and an activator for the compound, during which process at least a portion of the activator is converted to a cyclic urea. The solution is then transferred to the desorption zone to remove at least a portion of the absorbed acidic component. At least a portion of the partially desorbed scrubbing solution containing the cyclic urea is transferred from the desorption zone to a thermal conversion zone maintained at an elevated temperature wherein at least a portion of the cyclic urea is converted back to the activator. A portion of the scrubbing solution from the thermal conversion zone, relatively rich in the acidic component is vaporized and returned to the desorption zone, and another portion, relatively lean in the acidic component, is returned from the thermal conversion zone to the absorption zone.
    • 通过使吸收区中的气体混合物与包含碱性碱金属化合物和化合物的活化剂的吸酸洗涤溶液接触,将酸性气体如二氧化碳从包括酸性组分的常规气态混合物中除去,在该过程中至少 活化剂的一部分转化为环状脲。 然后将溶液转移到解吸区以除去至少一部分吸收的酸性组分。 含有环状尿素的部分解吸附的洗涤溶液的至少一部分从解吸区转移到保持在高温下的热转化区,其中至少一部分环脲转化回活化剂。 相对富含酸性组分的来自热转化区的洗涤溶液的一部分被蒸发并返回到解吸区,并且酸性组分中相对贫的另一部分从热转化区返回到吸收区。
    • 10. 发明授权
    • Particulate solids for catalyst supports and heat transfer materials
    • 用于催化剂载体和传热材料的颗粒状固体
    • US5476877A
    • 1995-12-19
    • US346973
    • 1994-11-29
    • LeRoy R. ClavennaStephen M. DavisRocco A. FiatoGeoffrey R. Say
    • LeRoy R. ClavennaStephen M. DavisRocco A. FiatoGeoffrey R. Say
    • B01J21/06B01J23/83C01B3/40C07C27/00
    • B01J21/066B01J23/83C01B3/40C01B2203/1052C01B2203/1064C01B2203/1082Y02P20/52
    • A particulate, precalcined low silica content zirconia, especially one stabilizer with yttria, is useful as a catalyst support or as a heat transfer solids component for conducting chemical reactions at high temperature, in oxidizing, reducing or hydrothermal conditions, especially in syn gas operations. An admixture of precalcined particulate low silica content zirconia, particularly a low silica content yttria-stabilized zirconia, is employed in a preferred embodiment as a heat transfer solid, in concentrations ranging generally from about 10 wt. % to about 99.9 wt. % with a particulate catalyst notably a nickel-on-alumina catalyst, in concentration ranging generally from about 0. 1 wt. % to about 90 wt. %. Such an admixture provides a particularly useful catalytic contact mass in high temperature oxidizing, reducing and hydrothermal environments, notably in conducting synthesis gas generation operations. This type of bed promotes continuous, highly efficient heat and mass transfer within the reacting gas phase. The presence of the heat transfer solid as a bed component maintains excellent bed fluidization characteristics, suppressing the normal tendency of the catalyst to sinter or agglomerate; tendencies which promote defluidization of the bed. Moreover, the heat transfer particles of the bed are highly attrition resistant, and are chemically compatible with the catalyst particles of the admixture.
    • 颗粒状预煅烧的低二氧化硅含量的氧化锆,特别是具有氧化钇的一种稳定剂,可用作催化剂载体或用作在高温,氧化,还原或水热条件下进行化学反应的传热固体组分,特别是在合成气操作中。 预先煅烧的颗粒状低二氧化硅含量的氧化锆,特别是低二氧化硅含量氧化钇稳定的氧化锆的混合物在优选的实施方案中用作传热固体,浓度通常为约10重量% %至约99.9wt。 %的颗粒催化剂,特别是镍 - 氧化铝催化剂,其浓度范围通常为约0.1重量% %至约90wt。 %。 这种混合物在高温氧化,还原和水热环境中特别是在进行合成气生成操作中提供特别有用的催化接触物质。 这种类型的床促进在反应气相内的连续,高效的热和质量传递。 作为床成分的传热固体的存在保持了优异的床流化特性,抑制了催化剂烧结或附聚的正常趋势; 促进床层流变的趋势。 此外,床的传热颗粒是高度耐磨性的,并且与混合物的催化剂颗粒化学相容。