Abstract: Isomerization of xylene admixed with other alkyl aromatics of at least eight carbon atoms and with normal or slightly branched paraffins is conducted at 600.degree.-800.degree. F. with a zeolite like zeolite ZSM-5 of reduced acid activity.

Abstract: A catalytic process is provided for converting gaseous feedstocks containing ethane to liquid aromatics by contacting said gaseous feeds in the absence of added air or oxygen, under conversion conditions, with a crystalline zeolite catalyst having incorporated therein a minor amount of gallium, thereby converting the ethane in the feedstock to aromatics and recovering a liquid mixture of benzene, toluene and xylene.

Abstract: Paraffinic hydrocarbons of 2 to 16 carbon atoms are converted to aromatic in the presence of oxygen and a zeolite catalyst incorporating oxidative dehydrogenative metal or metal oxide components

Abstract: Cracking catalysts or catalyst supports prepared from mixtures comprising colloidal alumina, colloidal silica, a particulate weighting agent, and/or an active catalytic component possess excellent catalytic and physical properties. The catalysts in accordance with the invention also show excellent resistance to metal poisoning, and are also highly useful in non-cracking and/or hydroconversion processes.

Abstract: A method of preparing aromatics processing catalysts which comprises incorporating a noble metal with a member or members of a useful class of zeolites, with such incorporation occurring after zeolite crystallization, but prior to final catalyst particle formation, i.e. extrusion into particles. Said useful class of zeolites is characterized by a silica to alumina mole ratio of at least 12 and a Constraint Index in the approximate range of 1 to 12.

Abstract: Octane and total yield improvement in catalytic cracking processes can be attained by the addition to conventional cracking catalysts of very small amounts of additive catalyst comprising a class of zeolites characterized by a silica to alumina mole ratio greater than 12 and a constraint index of about 1 to 12. The weight ratio of said zeolite of the additive catalyst to the amount of active component, e.g. faujasite zeolite, in the conventional cracking catalyst ranges from between about 1:400 and about 1:15.

Abstract: A method is disclosed for the conversion of synthesis gas to a liquid hydrocarbon product having a boiling range of less than 400.degree. F. at a 90% overhead utilizing a novel catalyst prepared from finely divided iron powder or iron oxide. The novel method involves contacting synthesis gas with a single particle catalyst containing iron, a crystalline acidic aluminosilicate zeolite having a silica-to-alumina ratio of at least 12, a pore size greater than about 5 Angstrom units, and a constraint index of about 1 to 12, and a matrix. The catalyst does not contain promoters.

Abstract: A method is disclosed for the conversion of synthesis gas to a liquid hydrocarbon product having a boiling range of less than 400.degree. F. at a 90% overhead utilizing a novel catalyst prepared from a water-insoluble organic iron compound. The novel method involves contacting synthesis gas with a single particle catalyst containing iron, a crystalline acidic aluminosilicate zeolite having a silica-to-alumina ratio of at least 12, a pore size greater than about 5 Angstrom units, and a constraint index of about 1 to 12, and a matrix. The catalyst does not contain promoters.

Abstract: Isomerization of xylenes admixed with other alkyl aromatics of at least eight carbon atoms and with normal or slightly branched paraffins is conducted at 800.degree.-1000.degree. F. with a zeolite like zeolite ZSM-5 of reduced acid activity.

Abstract: A method of passivating metal contaminants on cracking catalysts which comprises contacting said catalysts with steam for limited periods of time and at moderate temperatures.

Abstract: A method is disclosed for the conversion of synthesis gas to a liquid hydrocarbon product having a boiling range of less than 400.degree. F. at a 90% overhead utilizing a novel catalyst prepared from a water-insoluble organic iron compound. The novel method involves contacting synthesis gas with a single particle catalyst containing iron, a crystalline acidic aluminosilicate zeolite having a silica-to-alumina ratio of at least 12, a pore size greater than about 5 Angstrom units, and a constraint index of about 1 to 12, and a matrix. The catalyst does not contain promoters.

Abstract: A metal combustion promoter is introduced to the circulating inventory of catalyst in a catalytic cracking unit as a mixture of particles rich in metal with particles free of metal such that the net concentration of metal in the mixture is about 1 to 10 ppm. According to a preferred embodiment the particles rich in metal contain about 50 ppm of platinum, iridium, osmium, palladium, rhodium, ruthenium or rhenium. When such mixtures are supplied to the circulating inventory, it is found that specific activity of the metal is enhanced in the sense that activity of the mixture for oxidation of carbon monoxide is higher than that of catalyst in which an equal amount of metal is evenly distributed among all the particles.

Abstract: Amorphous (e.g., silica-alumina) and/or crystalline (e.g. aluminosilicate zeolite) cracking catalysts having improved resistance to metal poisoning are provided when colloidal dispersions, such as silica and/or alumina are added thereto.

Abstract: A metal combustion promoter is introduced to the circulating inventory of catalyst in a catalytic cracking unit as a mixture of particles rich in metal with particles free of metal such that the net concentration of metal in the mixture is about 1 to 10 ppm. According to a preferred embodiment the particles rich in metal contain about 50 ppm pf platinum, iridium, osmium, palladium, rhodium, ruthenium or rhenium. When such mixtures are supplied to the circulating inventory, it is found that specific activity of the metal is enhanced in the sense that activity of the mixture for oxidation of carbon monoxide is higher than that of catalyst in which an equal amount of metal is evenly distributed among all the particles.

Abstract: A catalytic process is provided for cracking a hydrocarbon charge stock containing aromatic nuclei components and non-aromatic nuclei components which involves contacting such chargestock with a catalyst composition having an alkali metal content less than about 1.5 weight percent and containing a mixture of faujasite and mordenite in which contacting takes place under catalytic cracking conditions of such severity that the conversion level exceeds that attributable to conversion of the non-aromatic nuclei portion of the chargestock. Under such conditions, the coke yield is substantially lower than would be obtained with the same catalyst in the absence of mordenite at the same level of conversion.

Abstract: A method is provided for obtaining crystalline dealuminized products by treating a slurry of a crystalline aluminosilicate zeolite in an aqueous solution of an ammonium or alkali metal salt which upon acidification yields an anion which complexes with aluminum by adding to said slurry a water-soluble acid having a first ionization constant greater than 10.sup.-2 at a rate such that a controlled amount of aluminum is removed from the zeolite to yield a resulting product from which at least about 10% and as much as about 85% of the initial aluminum has been removed while retaining more than 60% of the original crystallinity.