Abstract: A microspherical fluid catalytic cracking (FCC) catalyst includes Y zeolite and a gamma-alumina.

Abstract: A process for preparing crystalline boehmite includes combining a stoichiometric amount of flash calcined gibbsite (AI2O3) and gibbsite (Al(OH)3) in a pressurizable reaction vessel; heating the flash calcined gibbsite and gibbsite in the reaction vessel to a temperature of about 200° C. to about 280° C. and for a time sufficient to form crystalline boehmite. A crystalline boehmite exhibiting a crystallite from about 600 ? to about 850 ? when measured in the 120 direction of the crystallographic space group Cmcm.

Abstract: A porous shaped catalyst support body comprising at least 85% by weight of alpha-alumina, wherein the support has a total pore volume in the range from 0.5 to 2.0 mL/g as determined by mercury porosimetry, and a pore structure characterized by a geometric tortuosity ? in the range from 1.0 to 2.0; and an effective diffusion parameter ? in the range from 0.060 to 1.0; wherein geometric tortuosity ? and effective diffusion parameter ? are determined by image analysis algorithms from computer-assisted 3D reconstructions of focused ion beam scanning electron microscope analyses. The structure of the support has a high total pore volume, such that impregnation with a large amount of silver is possible, while the surface area is kept sufficiently high in order to assure optimal dispersion of the catalytically active species, especially metal species. The support has a pore structure that leads to a maximum rate of mass transfer within the support.

Abstract: A strontium-catalyzed process for preparing boehmite includes combining a strontium material, flash calcined gibbsite, and water to obtain an aqueous suspension; contacting the aqueous suspension with a water-soluble carbonate material; and heating the aqueous suspension to a temperature, and for a time, sufficient to form at least about 5 wt. % of boehmite.

Abstract: A porous alpha-alumina catalyst support is prepared by (i) preparing a precursor material comprising a boehmitic-derived alumina having a pore volume of at least 0.6 mL/g, wherein the boehmitic-derived alumina is obtained by thermal decomposition of a boehmitic starting material and the boehmitic starting material consists predominantly of block-shaped crystals, and optionally an inorganic bond material; (ii) forming the precursor material into shaped bodies; (iii) calcining the shaped bodies to obtain the porous alpha-alumina catalyst support. The support structure has a high overall pore volume, while keeping its surface area sufficiently large so as to provide optimal dispersion of catalytically active species, in particular metal species. The support is useful for a catalyst for producing ethylene oxide by gas-phase oxidation of ethylene.

Abstract: A tableted catalyst support, characterized by an alpha-alumina content of at least 85 wt.-%, a pore volume of at least 0.40 mL/g, as determined by mercury porosimetry, and a BET surface area of 0.5 to 5.0 m2/g. The tableted catalyst support is an alpha-alumina catalyst support obtained with high geometrical precision and displaying a high overall pore volume, thus allowing for impregnation with a high amount of silver, while exhibiting a surface area sufficiently large so as to provide optimal dispersion of catalytically active species, in particular metal species. The invention further provides a process for producing a tableted alpha-alumina catalyst support, which comprises i) forming a free-flowing feed mixture comprising, based on inorganic solids content, at least 50 wt.-% of a transition alumina; ii) tableting the free-flowing feed mixture to obtain a compacted body; and iii) heat treating the compacted body at a temperature of at least 1100° C., preferably at least 1300° C.

Abstract: A support comprising kaolin clay, wherein the kaolin clay comprises less than or equal to about 0.6% by weight of iron, based on total weight of the support.

Abstract: A microspherical fluid catalytic cracking (FCC) catalyst includes Y zeolite and a gamma-alumina.

Abstract: The present disclosure provides catalyst compositions capable of reducing nitrogen oxide (NOx) emissions in engine exhaust. The catalyst compositions include metal ion-exchanged zeolites having a domain size of less than about 1500 ?ngstroms (?), a crystallographic strain of less than about 0.7%, or both. Further provided are catalyst articles coated with such compositions, processes for preparing such catalyst compositions and articles, an exhaust gas treatment system including such catalytic articles, and methods for reducing NOx in an exhaust gas stream using such catalytic articles and systems.

Abstract: A microspherical fluid catalytic cracking (FCC) catalyst includes Y zeolite and a gamma-alumina.

Abstract: A microspherical fluid catalytic cracking catalyst includes zeolite, and alkali metal ion or alkaline earth metal ion.

Abstract: A microspherical fluid catalytic cracking catalyst includes zeolite, and alkali metal ion or alkaline earth metal ion.

Abstract: A microspherical fluid catalytic cracking (FCC) catalyst includes Y zeolite and a gamma-alumina.

Abstract: A microspherical fluid catalytic cracking catalyst includes zeolite, and alkali metal alkaline earth metal ion.

Abstract: A micro spherical fluid catalytic cracking catalyst includes zeolite, and alkali metal alkaline earth metal ion.

Abstract: A method for controllably producing a hematite-containing Fischer-Tropsch catalyst by combining an iron nitrate solution with a precipitating agent solution at a precipitating temperature and over a precipitation time to form a precipitate comprising iron phases; holding the precipitate from at a hold temperature for a hold time to provide a hematite containing precipitate; and washing the hematite containing precipitate via contact with a wash solution and filtering, to provide a washed hematite containing catalyst. The method may further comprise promoting the washed hematite containing catalyst with a chemical promoter; spray drying the promoted hematite containing catalyst; and calcining the spray dried hematite containing catalyst to provide a calcined hematite-containing Fischer-Tropsch catalyst.

Abstract: A method for controllably producing a hematite-containing Fischer-Tropsch catalyst by combining an iron nitrate solution with a precipitating agent solution at a precipitating temperature and over a precipitation time to form a precipitate comprising iron phases; holding the precipitate from at a hold temperature for a hold time to provide a hematite containing precipitate; and washing the hematite containing precipitate via contact with a wash solution and filtering, to provide a washed hematite containing catalyst. The method may further comprise promoting the washed hematite containing catalyst with a chemical promoter; spray drying the promoted hematite containing catalyst; and calcining the spray dried hematite containing catalyst to provide a calcined hematite-containing Fischer-Tropsch catalyst.

Abstract: A method for controllably producing a hematite-containing Fischer-Tropsch catalyst by combining an iron nitrate solution with a precipitating agent solution at a precipitating temperature and over a precipitation time to form a precipitate comprising iron phases; holding the precipitate from at a hold temperature for a hold time to provide a hematite containing precipitate; and washing the hematite containing precipitate via contact with a wash solution and filtering, to provide a washed hematite containing catalyst. The method may further comprise promoting the washed hematite containing catalyst with a chemical promoter; spray drying the promoted hematite containing catalyst; and calcining the spray dried hematite containing catalyst to provide a calcined hematite-containing Fischer-Tropsch catalyst.

Abstract: An iron-based Fischer-Tropsch catalyst comprising magnetite and characterized by integrable X-ray diffraction reflections corresponding to (311), (511), (440), and (400), such that the relative intensity of the (400) reflection to the (300) reflection is less than about 39%. A method of preparing an activated iron-based Fischer-Tropsch catalyst by providing a precipitated catalyst comprising oxides including at least iron oxide; and activating the precipitated catalyst to provide the activated iron-based Fischer-Tropsch catalyst, wherein activating the precipitated catalyst comprises exposing the precipitated catalyst to an activation gas and increasing the temperature from a first temperature to a second temperature at a ramp rate, whereby the ratio of the intensity of the (400) reflection of the activated iron-based Fischer-Tropsch catalyst to the intensity of the (311) reflection thereof is less than 38%.

Abstract: An iron-based Fischer-Tropsch catalyst comprising magnetite and characterized by integrable X-ray diffraction reflections corresponding to (311), (511), (440), and (400), such that the relative intensity of the (400) reflection to the (300) reflection is less than about 39%. A method of preparing an activated iron-based Fischer-Tropsch catalyst by providing a precipitated catalyst comprising oxides including at least iron oxide; and activating the precipitated catalyst to provide the activated iron-based Fischer-Tropsch catalyst, wherein activating the precipitated catalyst comprises exposing the precipitated catalyst to an activation gas and increasing the temperature from a first temperature to a second temperature at a ramp rate, whereby the ratio of the intensity of the (400) reflection of the activated iron-based Fischer-Tropsch catalyst to the intensity of the (311) reflection thereof is less than 38%.