摘要:
Oxidic composition consisting essentially of oxidic forms of a first metal, a second metal, and optionally a third metal, the first metal being either Fe or Zn and being present in the composition in an amount of from about 5 to about 80 wt %, the second metal being Al and being present in the composition in an amount of from about 5 to about 80 wt %, the third metal being selected from the group consisting of Mo, W, Ce, and V, and being present in an amount of from 0 to about 17 wt %—all weight percentages calculated as oxides and based on the weight of the oxidic composition, the oxidic composition being obtainable by (a) preparing a physical mixture comprising solid compounds of the first, the second, and the optional third metal, (b) optionally aging the physical mixture, without anionic clay being formed, and (c) calcining the mixture. This composition is suitable for use in FCC processes for the reduction of SOx emissions from the regenerator and for the production of sulphur-lean fuels and has only a minimised influence on the zeolite's hydrothermal stability.
摘要:
The present invention relates to a method of preparing a catalyst support or a supported metal catalyst, the method comprising: (a) admixing a porous refractory oxide with a water soluble zirconium precursor in an alkaline solution, and if a supported metal catalyst is prepared, with a precursor of the metal, yielding a slurry, (b) drying the slurry, and (c) calcining; thus yielding a catalyst support or supported metal catalyst having an increased hydrothermal strength. The invention further relates to a method of preparing a catalyst body, the method comprising: (a) admixing a porous refractory oxide with a water soluble zirconium precursor in an alkaline solution, and if a supported metal catalyst is prepared, with a precursor of the metal or the metal itself, yielding a slurry, (b) coating metal with the slurry, (c) drying the coating, and (d) calcining; thus yielding a catalyst body comprising a catalyst support or supported metal catalyst having an increased hydrothermal strength In a preferred embodiment, the zirconium containing compound comprises zirconium carbonate in an ammonium solution. The improved hydrothermal strength is particularly suitable for slurry-type Fischer-Tropsch reactors.
摘要:
A catalyst, catalyst precursor, or catalyst carrier formed as an elongated shaped particle having a cross section comprising three protrusions each extending from and attached to a central position. The central position is aligned along the longitudinal axis of the particle. The cross-section of the particle occupies the space encompassed by the outer edges of six outer circles around a central circle, each of the six outer circles contacting two neighbouring outer circles, the particle occupying three alternating outer circles equidistant to the central circle and the six interstitial regions, the particle not occupying the three remaining outer circles which are between the alternating occupied outer circles. The ratio of the diameter of the central circle to the diameter of the outer occupied circle is more than 1, and the ratio of the diameter of the outer unoccupied circle to the diameter of the outer occupied circle is more than 1. The ratio of the diameter of the outer unoccupied circle to the diameter of the outer occupied circle is more than the ratio of the diameter of the central circle to the diameter of the outer occupied circle.
摘要:
A sulfur reduction catalyst useful to reduce the levels of sulfur in a cracked gasoline product comprises a metal vanadate compound. The metal vanadate compound can be supported on a molecular sieve such as a zeolite in which the metal vanadate compound is primarily located on the exterior surface of the pore structure of the zeolite and on the surface of any matrix material used to bind or support the zeolite.
摘要:
A robust, high-temperature catalyst comprising a catalytic component supported on a porous ceramic carrier is provided for propellant decomposition. The catalyst comprises a porous, high-surface-area ceramic carrier material and up to 40% of metal and/or metal oxide, based upon the total weight of the catalyst. The supported species include metals and/or oxides of transition and lanthanide metals that possess high activity for the decomposition of liquid propellants. The carrier can be produced via a wet chemical process and then impregnated with salt solutions containing desired active-phase precursors. The catalyst can cause a liquid propellant to react upon contact with the catalyst and to produce hot gases that can be used to provide thrust, drive turbines, inflate devices, etc.
摘要:
The method of producing fatty acid alkyl esters and/or glycerine of the present invention is a method of producing high-purity fatty acid alkyl esters and/or glycerine advantageously from the energy viewpoint while reducing the energy consumption of the production, and the products can be used in various fields of application, for example in biodiesel fuels, foods, cosmetics and pharmaceuticals. The above-mentioned method of producing fatty acid alkyl esters and/or glycerine by reacting a fat or oil with an alcohol using an insoluble solid catalyst in a reaction apparatus comprising at least one reactor, comprises (a) a step of obtaining low-boiling components removed liquid by removing low-boiling components or fraction from an effluent liquid of a reactor and (b) a step of separating the fatty acid alkyl esters and glycerine from the low-boiling components removed liquid, wherein an eluted active metal component of the insoluble solid catalyst in the effluent liquid of a reactor amounts to a level not higher than 1,000 ppm.
摘要:
A process for the manufacture of an improved iron promoted vanadium antimony oxide catalyst useful in the ammoxidation of propane to acrylonitrile wherein the source of iron (i.e. an iron containing compound such as Fe2O3) employed in the catalyst preparation has a BET surface area greater than 120 m2/gram. Such catalysts are useful in processes for the ammoxidation of a C3-C5 paraffinic hydrocarbon to its corresponding α-β-unsaturated nitrile, the ammoxidation of propylene with NH3 and oxygen to acrylonitrile, the ammoxidation of methylpyridine with NH3 and oxygen to make cyanopyridine, the ammoxidation of m-xylene with NH3 and oxygen to make isophthalonitrile, and the oxidation of o-xylene to make phthalic anhydride.
摘要翻译:一种用于制备用于将丙烷氨氧化成丙烯腈的改进的铁促进的钒氧化锑催化剂的方法,其中在催化剂制备中使用的铁源(即,含铁化合物如Fe 2 O 3)具有大于120的BET表面积 m 2 /克。 这样的催化剂可用于将C3-C5链烷烃与其相应的α-β-不饱和腈的氨氧化反应,丙烯与NH 3和氧氨氧化成丙烯腈,甲基吡啶与NH 3的氨氧化反应,制得氰基吡啶, 间二甲苯与NH 3和氧的氨氧化反应制得间苯二甲腈,并使邻二甲苯氧化成邻苯二甲酸酐。
摘要:
Raney copper which is doped with at least one metal from the group comprising iron and/or noble metals is used as a catalyst in the dehydrogenation of alcohols.
摘要:
A plasma assisted reactor for the removal of carbonaceous combustion products or for simultaneous removal of carbonaceous combustion products and nitrogen oxides from the exhaust emissions from an internal combustion engine, wherein the reactor includes a gas permeable bed made at least primarily of an active material having the general formula A1-xA1xB1-yB1yO3 or MxM11-xVO3 or M4V2O7.
摘要:
Solid catalysts suited for the fluidized/moving bed catalytic ammoxidation of alkanes comprise an active catalytic phase having the empirical formula (I): VSbaSnbTicFedEeOx (I) in which E is an element which provides an oxide of rutile structure or an element which, in combination with V, Sb, Sn, Ti, Fe and/or with another element E, provides a phase of rutile or trirutile structure, or a solid solution of rutile structure, a is a whole or fractional number equal to or greater than 0.5, b, c, d and e, independently, are each a whole or fractional number ranging from 0 to 100, and x is a whole or fractional number determined by the oxidation state of the other elements, such active catalytic phase being deposited onto/into particulates of a solid and porous oxidic support therefor, and are produced by (a) impregnating the solid and porous oxidic support with a solution, in at least one saturated alcohol, of compounds of vanadium and antimony and, optionally, compounds of tin and/or titanium and/or of iron and/or of element E, (b) contacting the solid and porous oxidic support thus impregnated with an aqueous buffer solution having a pH ranging from about 6 to 8, (c) separating the solids from such aqueous buffer solution and drying same, and (d) calcining the dried solids in two stages.