Abstract: Disclosed is a novel binary sieve catalyst useful for olefin upgrading and fluid catalytic cracking which comprises a crystalline zeolite metallosilicate core and a shell selected from an aluminum phosphate molecular sieve (AlPO.sub.4), a silicon-substituted aluminophosphate (SAPO), a metal aluminophosphate (MeAPO), and a crystalline metal aluminophosphate (MeAPSO) and is generally synthesized by a method comprising:adding a powdered form of crystalline zeolite metallosilicate into an aqueous slurry comprising phosphoric acid, alumina source, metal salt and an amine, mixing the slurry for 1 to 12 hours in a Teflon liner at room temperature, sealing said slurry in an autoclave and placing said slurry in an oven at 130.degree. C. to 240.degree. C. for 12-168 hours to form said binary molecular sieve catalyst, washing and drying the product, calcining the product at 530.degree. to 570.degree. C. in nitrogen for 5-15 hours, calcining the product in air for 1 to 3 hours to burn off the template.

Abstract: A method for producing chlorine dioxide by activating zeolite crystals (which have been impregnated with metal chlorite such as sodium chlorite, and a water-retaining substance such as magnesium sulfate, potassium chloride, or potassium hydroxide, or calcium chloride) with an acid, or activating an aqueous solution of metal chlorite (preferably sodium chlorite) and such a water-retaining substance. Acids useful for performing the activation are acetic acid, phosphoric acid, and citric acid. The activation can be performed by causing fluid to flow through a bed of zeolite crystals impregnated with calcium chloride (or another water-retaining substance) and sodium chlorite, and a bed of zeolite crystals impregnated with the acid. The two beds can be physically mixed together, or the fluid can be caused to flow sequentially through distinct first and second beds (preferably first through the bed containing acid-impregnated zeolite).

Abstract: Disclosed is a process of making mesoporous silico-aluminates from calcium bentonite by controlled extraction of octahedral aluminum under mild condition, by acid, preferably phosphoric acid. The mesoporous silicoaluminates contain only tetrahedral aluminum as the residual aluminum. As the result of the selective removal of the octahedral aluminum, the mesoporous silico-aluminates have several unprecedented properties compared to products produced by conventional processes either by mild acid-activation or by a removal of all the aluminum.

Abstract: An adsorbent for selective removal of nitrile from a hydrocarbon feedstock includes a substantially homogeneous mixture of a cationic nonacidic zeolite and an inorganic oxide matrix, the zeolite having an accessibility index of between about 0.1 to about 0.4, and the adsorbent being capable, when contacted with a hydrocarbon feedstock containing nitrile and containing dienes in an amount of at least about 1.0% by volume, of adsorbing at least about 80% of the nitrile during contact with at least about 200 volumes of the feedstock per volume of adsorbent.

Abstract: A catalyst comprising a modified mordenite zeolite catalyst modified with Pt and a promoter selected from the group consisting of Group IIB, Group IVA, Group VIB and mixtures thereof is effectively used in a process for the simultaneous dehydrogenation and isomerization of paraffins to isoparaffins and isoolefins under controlled conditions. The catalyst is prepared by depositing on the modified mordenite zeolite catalyst sequentially Pt and thereafter the promoter.

Abstract: A catalyst system comprising a physical mixture of particles of a non-acidic large-pore zeolite containing a platinum-group metal and particles comprising a refractory inorganic oxide which is metal-free is effective for the reforming of a hydrocarbon feedstock. Reforming of paraffinic feedstocks to effect aromatization, particularly of a raffinate from aromatics extraction, provides improved activity in producing gasoline-range products when using the catalyst system of the invention.

Abstract: Y zeolites with an SiO.sub.2 /Al.sub.2 O.sub.3 ratio in the framework of>100 with a high hydrothermal stability and resistance to aqueous, alkaline solutions are produced by treating a Y zeolite with a SiO.sub.2 /Al.sub.2 O.sub.3 ratio between 8 and 50, partially dealuminized according to known methods from NaY zeolite by treatment with silicon tetrachloride, with water vapor at temperatures between 500.degree. C. and 1000.degree. C.

Abstract: Stable, zirconia-pillared clays of reduced gallery height, useful as supports for hydroconversion catalysts, are prepared by treating clays with a zirconium compound, a surfactant and water, and compositing the reduced gallery height clay with suitable metal or metals.

Abstract: A process for the regeneration of a sulfur containing catalysts, wherein the catalyst is stripped of sulfur before the oxychlorination treatment of the regeneration process, typically before the catalyst is sent to the regeneration zone. The process is particularly useful for catalyst employed in hydrocarbon conversions such as dehydrogenation reactions, particularly those which comprise the injection of sulfur and/or at least one sulfur compound before or simultaneously to the introduction of the charge into the first reaction zone.

Abstract: This invention is a bimetallic catalyst comprising tungsten oxide and platinum in critical amounts on a mostly .gamma.-alumina support material. It is particularly optimal for use in lean-burn engine exhaust systems, including gasoline and diesel, where it efficiently reduces NOx in the exhaust gas.

Abstract: Disclosed is a process for removing acid soluble oils, produced as an undesirable by-product of an HF (catalyzed alkylation reaction, from a fluid containing a sulfone compound. The process includes the use of hydrocarbons to remove ASO from the sulfone-containing fluid.

Abstract: The present invention relates to a process for the catalytic reduction of nitrogen oxides contained in exhaust gases from combustion, which process comprises bringing said exhaust gases into contact with a Beta Zeolite exchanged with suitable amounts of cobalt salts, in the presence of a light hydrocarbon as the reducing agent. The present invention relates also to a catalyst for such a process, which catalyst comprises a Beta zeolite exchanged with cobalt salts, characterized by a Co: zeolite AL molar ratio of<0.5.

Abstract: Zeolite SSZ-33 containing titanium in its framework is prepared by post-synthesis treatment with titanium tetrachloride. The titanium-containing SSZ-33 is useful as a catalyst in oxidation reactions.

Abstract: A process is described for activation of layered silicates having an ion exchange capacity (IEC) of at least 25 meq/g by treating them with an acid, characterized in that the layered silicate is activated with about 1 to 10% by weight (based on the dry layered silicate) of an acid at a temperature of not more than 80.degree. C. and the activated layered silicate is calcined at temperatures of about 200.degree. to 400.degree. C. and comminuted desired.

Abstract: An adsorbent for selective removal of nitrile from a hydrocarbon feedstock includes a substantially homogeneous mixture of a cationic nonacidic zeolite and an inorganic oxide matrix, the zeolite having an accessibility index of between about 0.1 to about 0.4, and the adsorbent being capable, when contacted with a hydrocarbon feedstock containing nitrile and containing dienes in an amount of at least about 1.0% by volume, of adsorbing at least about 80% of the nitrile during contact with at least about 200 volumes of the feedstock per volume of adsorbent.

Abstract: The present invention provides novel catalysts for the simultaneous removal of SO.sub.2 and NO.sub.x from flue gases. The catalysts may be supported or unsupported, pretreated or untreated, but allow the simultaneous reduction of SO.sub.2 to S and NO.sub.x to N.sub.2. Elemental sulfur is a useful byproduct of the process.

Abstract: A method for producing chlorine dioxide by activating a mixture of impregnated zeolite crystals, the mixture itself, and a method for regenerating the mixture after chlorine dioxide production. The activation is accomplished by causing water or a moisture-containing gas (e.g., air including water vapor) to flow through the mixture or otherwise exposing the mixture to such fluid, or by exposing the mixture to liquid hydrogen peroxide, liquid sulfuric acid, ferric chloride solution, or sodium chlorate solution. The mixture can include sodium chlorite-impregnated zeolite crystals and zeolite crystals impregnated with ferric chloride, ferric sulfate, or both, and optionally also zeolite crystals impregnated with calcium chloride.

Abstract: A process for removing nitrogen oxide from exhaust is disclosed, comprising contacting exhaust containing nitrogen oxide with an alumina catalyst which contains not more than 0.5% by weight of an alkali metal and/or an alkaline earth metal and has a total pore volume of from 0.48 to 1.2 cm.sup.3 .multidot.g.sup.-1 with 0.26 to 0.6 cm.sup.3 .multidot.g.sup.-1 of the total pore volume being formed of pores of not greater than 80 .ANG. or has a volume of pores formed of pores of not greater than 60 .ANG. of from 0.06 to 0.2 cm.sup.3 .multidot.g.sup.-l and which may have supported thereon tin in an oxidative atmosphere containing excess oxygen in the presence of a hydrocarbon or an oxygen-containing organic compound.

Abstract: A process for reducing the level of nitrogen oxides (NO.sub.x) in a fossil fuel (e.g. coal) combustion flue gas has a selective non-catalytic reduction (SNCR) treatment stage followed by a selective catalytic reduction (SCR) treatment stage. The level of NO.sub.x produced by a power plant, particularly a coal fired power plant, varies depending upon the plant load. A set predetermined non-zero amount of first nitrogenous treatment agent is constantly introduced for the SNCR stage during all periods of plant operation. Additional first nitrogenous treatment agent is introduced for the SNCR stage only during periods of relatively higher NO.sub.x production, such as during peak load periods. A second nitrogenous treatment agent is added for the SCR stage up to the maximum SCR NO.sub.x reducing capability of the SCR stage based upon the total amount of NO.sub.x present in the flue gas, subject to limitations on the amount of allowable ammonia slip exiting the plant. Once the total amount of NO.sub.

Abstract: A high activity catalyst and the method of using it to effectively convert the hydrocarbon, soluble oil fraction and carbon monoxide in a diesel exhaust stream while minimizing the oxidation of SO.sub.2 is disclosed. The catalyst comprises at least one platinum group metal dispersed on a two-component support comprising in major amount one or more zeolites and in minor amount an inorganic oxide selected from the group consisting of alumina, titania and mixtures thereof.