The structured catalyst for oxidation for exhaust gas purification includes a support having a porous structure constituted by a zeolite-type compound, and at least one type of oxidation catalyst that is present in the support and selected from the group consisting of metal and metal oxide, the support having channels that communicate with each other, and the oxidation catalyst being present in at least the channels of the support.

The present invention relates to the catalytic processes for rendering harmless the flue gases of the power stations or more precisely to the catalysts for sulfur oxides reduction to elemental sulfur. The novel catalyst presents the binary polycations of copper and zinc or copper and manganese incorporated into the low silica faujasite X (LSX) having transition metals ratio Cu:Zn or Cu:Mn in the range of 2:1 to 4:1.

A catalyst structure includes a porous support structure, where the support structure includes an aluminosilicate material and any two or more metals loaded in the porous support structure selected from Ga, Ag, Mo, Zn, Co and Ce. The catalyst structure is used in a hydrocarbon upgrading process that is conducted in the presence of methane, nitrogen or hydrogen.

A process for preparing crystalline boehmite includes combining a stoichiometric amount of flash calcined gibbsite (AI.sub.2O.sub.3) and gibbsite (Al(OH).sub.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 Å to about 850 Å when measured in the 120 direction of the crystallographic space group Cmcm.

Embodiments of the present disclosure are directed to a method of producing an encapsulated hydroprocessing catalyst comprising: preparing a hydroprocessing catalyst comprising a porous support and at least one metal supported on the porous support, the porous support comprising alumina, silica, titania, or combinations thereof, and the at least one metal selected from IUPAC Groups 6, 9 and 10 metals; applying a catalyst activation precursor comprising a sulfur containing compound, a catalyst deactivation precursor comprising a nitrogen containing compound, or both onto pores of the hydroprocessing catalyst to form a loaded hydroprocessing catalyst; and coating the loaded hydroprocessing catalyst with a coating material to produce the encapsulated hydroprocessing catalyst, wherein the coating material comprises a polymer or a paraffinic oil.

Embodiments of the present disclosure are directed to a coated hydroprocessing catalyst comprising: a hydroprocessing catalyst comprising a porous support and at least one metal supported on the porous support; wherein the porous support comprising silica, alumina, titania, or combinations thereof; and the at least one metal selected from IUPAC Groups 6, 9 and 10 metals; a catalyst activation agent, a catalyst deactivation agent, or both loaded onto pores of the porous support, the catalyst activation agent comprising at least one sulfur compound and the catalyst deactivation agent comprising at least one nitrogen compound; and a coating layer on a surface of the hydroprocessing catalyst, the coating layer encapsulating the catalyst activation agent, the catalyst deactivation agent, or both within the hydroprocessing catalyst, wherein the coating layer comprises a polymer, or a paraffinic oil.

The present invention relates to a catalyst for isomerization of alkylated aromatics such as mixed xylenes, using xylene isomerization catalyst particles including post-framework modified USY zeolite in which zirconium atoms and/or titanium atoms and/or hafnium atoms form a part of a framework of an ultra-stable Y-type zeolite.

The present invention relates to catalysts, catalyst systems, and processes for the production of valuable light olefins, such as C.sub.2-C.sub.4 olefins (ethylene, propylene, and/or butenes) from paraffinic hydrocarbons, such as propane, through dehydrogenation and metathesis. Some particular aspects relate to the discovery of non-precious metal catalysts and catalyst systems utilizing such catalysts, for example in the case of being in an admixture with a metathesis catalyst, which advantageously exhibit high performance in terms of activity, selectivity, and stability. Other advantages can include a reduced production of byproducts (e.g., methane and ethane) that result from undesired side reactions, in addition to benefits that may be attained through the addition of a sulfur-bearing compound (e.g., H.sub.2S).

Embodiments of the present disclosure are directed to a method of producing an encapsulated hydroprocessing catalyst comprising: preparing a hydroprocessing catalyst comprising a porous support and at least one metal supported on the porous support, the porous support comprising alumina, silica, titania, or combinations thereof, and the at least one metal selected from IUPAC Groups 6, 9 and 10 metals; applying a catalyst activation precursor comprising a sulfur containing compound, a catalyst deactivation precursor comprising a nitrogen containing compound, or both onto pores of the hydroprocessing catalyst to form a loaded hydroprocessing catalyst; and coating the loaded hydroprocessing catalyst with a coating material to produce the encapsulated hydroprocessing catalyst, wherein the coating material comprises a polymer or a paraffinic oil.

A catalyst structure includes a porous support structure, where the support structure includes an aluminosilicate material. Any two or more metals are loaded in the porous support structure, the two or more metals selected from the group consisting of Ga, Ag, Mo, Zn, Co and Ce, where each metal loaded in the porous support structure is present in an amount from about 0.1 wt % to about 20 wt %. In example embodiments, the catalyst structure includes three or more of the metals loaded in the porous support structure. The catalyst structure is used in a hydrocarbon upgrading process that is conducted in the presence of methane, nitrogen or hydrogen.