Abstract: The present invention is a process for converting a hydrocarbon feedstream by a catalytic reaction in a catalytic cracking process comprising contacting said feedstream with a demetallated molecular sieve catalyst prepared by first synthesizing the molecular sieve in a metal aluminosilicate form, wherein the metal is Fe, Ga, Zn, B, Cr, Ni or Co and mixtures thereof, removal of the template, if present, by calcination, extracting the metal, with partial extraction of Al, cation exchange to reduce the residual base cation level to less than 1% wt; and catalyst fabrication by mixing the exchanged molecular sieve, optionally adding a secondary promoter, with a binder and forming.

Abstract: Zeolites partially exchanged with copper, in particular faujasites, in which the copper does not largely occupy the small cages (for example the sodalite cages of the faujasites), are used as non-nitrogen-protoxide-generating SCR catalysts. Particular attention is drawn to certain mixed rare-earth/copper zeolites. The selectivity of the reduction of NOx to N2 is correlated with the TPR diagram of the catalysts.

Abstract: Catalysts for olefin polymerization which consist essentially of a transition metal compound, a modified clay compound and an organic aluminum compound, wherein the modified clay compound comprises a reaction product of a clay mineral and a proton acid salt of a specific amine compound, as well as a method of polymerizing olefins using such catalysts. It is possible thereby to obtain olefin polymers with high productivity and low ash content.

Abstract: This invention discloses a durable catalyst for internal combustion engine or power plant exhaust gas purification which is comprised of a zeolite as the support and Fe (II) base-exchanged cation as the active component for the NO.sub.x selective catalytic reduction (SCR). It has stable activity with up to 20% H.sub.2 O and up to 250 ppm SO.sub.2 and combinations thereof over many hours in the exhaust stream. It is resistant to temperature excursions up to about 1,000.degree. C. The method of producing this catalyst preferably comprises ion-exchanging the zeolite with Fe (II) in an aqueous solution of iron (II) oxalate, iron (II) citrate or iron (II) formate, or a mixture of oxalic acid, citric acid/salts, formic acid/salts, 2,3,4,5,6-pentahydroxyl caproic acid/salts and iron (II) salts, for example, sulfate, nitrate, chloride, carboxylate, chloride acetate, phosphate and carbonate, in the pH range from 3 to 13 under anaerobic conditions.

Abstract: The invention is a selective reduction catalyst useful for converting exhaust gases generated by a lean-burn engine where the atmosphere is oxidizing. The catalyst comprises zeolite containing two forms or rhodium, small metal particles and ion-exchanged into the zeolite, the latter being in significant excess. In addition, the catalyst contains a rare-earth metal having primarily a +3 or higher valence such as lanthanum in a significantly higher amount relative the total amount of rhodium.

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 comprising a modified mordenite zeolite catalyst modified with Pt and a promoter selected from the group consisting of Group IIB, Grouo 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: Molecular sieves are modified by an ion exchange process where metal cations are introduced into the molecular sieves by means of solid state ion exchange. The solid state ion exchange can be carried out as follows: a weighed amount of calcined and activated zeolite is intimately mixed with a precalculated amount of PtCl.sub.2, PdCl.sub.2, RhCl.sub.3, CuCl.sub.2, V.sub.2 O.sub.5 or another compound of the noble metals (e.g., corresponding halides or oxides), the solids mixture is then heated in a current of inert gas (e.g., a current of helium gas or of nitrogen) to temperatures of 400.degree. to 600.degree. C., then cooled down to room temperature and subsequently reduced in a current of hydrogen for 10 to 14 hours at 280.degree. to 350.degree. C. in order to produce small metal clusters from the cationically introduced metal.

Abstract: Molecular sieves are modified by an ion exchange process where metal cations are introduced into the molecular sieves by means of solid state ion exchange. The solid state ion exchange can be carried out as follows: a weighed amount of calcined and activated zeolite is intimately mixed with a precalculated amount of PtCl.sub.2, PdCl.sub.2, RhCl.sub.3, CuCl.sub.2, V.sub.2 O.sub.5 or another compound of the noble metals (e.g., corresponding halides or oxides), the solids mixture is then heated in a current of inert gas (e.g., a current of helium gas or of nitrogen) to temperatures of 400.degree. to 600.degree. C., then cooled down to room temperature and subsequently reduced in a current of hydrogen for 10 to 14 hours at 280.degree. to 350.degree. C. in order to produce small metal clusters from the cationically introduced metal.

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 for purifying an exhaust gas comprising a zeolite catalyst ion-exchanged with a transition metal, which is heat-treated in a gas stream containing a sulfur oxide, optionally followed by washing with a glycol.

Abstract: The present invention relates to the production of catalysts and adsorbents which can be used for the removal of nitrogen oxides from exhaust gases containing the same.

Abstract: A glass flux composition consisting essentially by weight of 45-65% Bi.sub.2 O.sub.3, 25-36% SiO.sub.2, 4-6% B.sub.2 O.sub.3, 3-6% TiO.sub.2, 1-3% Na.sub.2 O, 0.5-2% K.sub.2 O, 2-6% Li.sub.2 O, 0-3% Al.sub.2 O.sub.3, 0-1% ZrO.sub.2, 0-1% BaO, 0-1% CaO, 0-1% MgO, 0-1% ZnO, 0-3% PbO and 0-0.5% CdO is useful for preparing a glaze or enamel composition especially for application to glass such that the composition is then fired in contact with a mould surface or with another glass surface.

Abstract: A regenerable molecular sieve comprises 0.001-15% elemental silver or gold in or on zeolite A. The molecular sieve is capable of simultaneously removing mercury and water from a fluid. A method for impregenating zeolite A with elemental silver or gold comprising treating the zeolite A with a solution of a silver or gold salt of a carboxylic acid and heating the impregnated zeolite A at a temperature sufficient to decompose the salt is also provided. A method for simultaneously and repeatedly removing mercury and water from a hydrocarbon fluid by contacting the fluid with an effective amount of a molecular sieve comprising zeolite A and 0.001-15% elemental silver or gold and regenerating the zeolite A at elevated temperatures is also provided.

Abstract: Carboxylic acids are produced in high yield by contacting alcohols, water and hydrogen with a Cu-Zn-Cr-base promoter/alumina catalyst.

Abstract: The metallization of porous solid bodies, such as, for example, ion exchange materials, by loading the surfaces of the metal-free substrates with transition metal ions and subsequently treating them with reducing agents can be improved by activating the substrates, before or after the loading with metal ions, with elements of group 1 or 8 of the periodic table or compounds thereof and sensitizing any activating ions still present. The metallization products are useful hydrogenation catalysts.