Abstract: A continuous catalytic alkylation reaction and catalyst reactivation process is carried out using a simulated moving catalyst bed to effect simultaneously in different zones of a multi-zone, fixed catalyst bed, an alkylation reaction and a reactivation of catalyst. The catalyst of the present invention is a crystalline aluminosilicate zeolite composited with a Group VIII metal hydrogenation agent, and the reactivation medium utilized includes alkylatable hydrocarbon and hydrogen.

Abstract: Process for the methylation of toluene to selectively yield para-xylene by reacting toluene with a methylating agent, such as methanol, in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, which zeolite has a silica/alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12, the catalyst having been modified by the addition thereto of phosphorus in an amount of at least 0.5 percent by weight and activated by vapor phase treatment at a temperature between about 400.degree. C. and about 650.degree. C. for at least about 1 hour with a methanol/water mixture.

Abstract: Process for the selective production of para-xylene by methylation of toluene in the presence of a catalyst comprising a crystalline aluminosilicate of average crystal size greater than 0.5 micron, which aluminosilicate has the structure of ZSM-5, ZSM-11 or ZSM-21.

Abstract: Process for the selective production of para-xylene by methylation of toluene in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, said zeolite having a silica to alumina ratio of at least 12 and a constraint index, as hereinafter defined, within the approximate range of from 1 to 12, which catalyst has undergone prior treatment to deposit a coating of between about 15 and about 75 weight percent of coke thereon.

Abstract: An adsorptive separation process for separating ethylbenzene from a feed mixture comprising ethylbenzene and a plurality of xylene isomers, which process comprises contacting the feed mixture with a crystalline aluminosilicate adsorbent comprising a sodium-type Y zeolite having a SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio greater than about 4.5, selectively adsorbing substantially all of the said xylene isomers to the substantial exclusion of the ethylbenzene and recovering high-purity ethylbenzene. A desorption step may then be used to desorb the adsorbed xylene isomers. The process can be either in the liquid or vapor phase.

Abstract: A process for separating para-xylene in high purity and at high recovery from a feed stream comprising para-xylene and at least one other C.sub.8 aromatic isomer which employs an adsorbent comprising a type X or a type Y zeolite containing barium and strontium at the exchangeable cationic sites in a weight ratio of barium to strontium of from about 1:1 to about 15:1 to selectively adsorb para-xylene from the feed stream and a desorbent material comprising para-diethylbenzene to remove the adsorbed para-xylene from the adsorbent.

Abstract: A process for the separation of the para-isomer from a hydrocarbon feed mixture comprising at least two bi-alkyl substituted monocyclic aromatic isomers, including the para-isomer, said isomers having from 8 to about 18 carbon atoms per molecule which process employs an adsorbent comprising a type Y zeolite essentially completely exchanged with a single cation selected from the group consisting of potassium, cesium, and rubidium. The feed mixture is passed through a bed of the adsorbent wherein the para-isomer is preferentially adsorbed within the adsorbent and thereafter recovered from the adsorbent.

Abstract: Alkylatable aromatic hydrocarbons are alkylated with olefins and alkylhalides under anhydrous alkylating conditions in the presence of a metallic cation exchanged trioctahedral 2:1 layer-lattice smectite-type catalyst in which the metallic cation has a Pauling electronegativity greater than 1.0. In a specific embodiment, 1-dodecene is reacted with benzene by contacting the dodecene and benzene under anhydrous conditions in the liquid phase at the boiling point of the mixture with a catalyst comprising a metallic cation such as Al.sup.3.sup.+, In.sup.3.sup.+ and Cr.sup.3.sup.+ exchanged onto the surface of hectorite clay.

Abstract: There is a drastic change in the composition of the effluent streams of a fixed bed adsorption column when the feed and withdrawal points are periodically advanced in order to simulate moving-bed operation. These effluents are fractionated to recover a desorbent which is recycled to the adsorption column. The claimed process improves the efficiency of this fractionation by changing the locations at which the effluents enter the fractionators to correlate the compositions of the effluents and the material in the fractionators at these locations.

Abstract: This invention relates to a process for converting hydrocarbons in the presence of a catalyst comprising a ZSM-35 crystalline aluminosilicate, which zeolite, as crystallized, is in the form of very small particles having diameters, in the range of 0.005 micron to 0.1 micron. The use of such small crystalline ZSM-35 zeolite as catalyst in hydrocarbon conversion serves to retard catalyst aging during the hydrocarbon conversion reaction.

Abstract: Supported olefin conversion catalysts are activated by a method which comprises calcining the catalyst, impregnating the calcined catalyst with an alcoholic solution of an alkali metal salt, an alkali metal base or an alkali metal alcoholate and then recalcining the catalyst.

Abstract: A process for recovering mesitylene and ethyltoluenes contained in a petroleum naphtha reformate by sulfonating the naphtha reformate with sulfuric acid and hydrolyzing the sulfonate product at reduced pressure.

Abstract: A process for producing alkylnaphthalenes by alkylating naphthalene with an olefin having 2 to 4 carbon atoms, which comprises (1) introducing the olefin into a solution of crude naphthalene containing thianaphthene as an impurity in a solvent having a boiling point sufficiently different from the boiling point of the naphthalene and alkylnaphthalenes produced that the solvent is separable by distillation in the presence of (i) an aluminum chloride complex consisting of (a) aluminum chloride, (b) hydrogen chloride and (c) an alkylated benzene or naphthalene, or (ii) a solid aluminum chloride which is dissolved into the reaction solution by adding gaseous hydrogen chloride simultaneously with or prior to the introducing of the olefin, (2) aging the reaction solution, and (3) recovering the resulting alkylnaphthalenes, whereby alkylnaphthalenes, containing as monoalkylnaphthalenes a predominant amount of a .beta.-monoalkylnaphthalene, are obtained in a high yield.

Abstract: A process for cracking thermoplastic polymers to valuable products, primarily their monomers, comprising the following steps:A. converting the polymer into a liquid or fluidized stage;B. introducing the polymer from step (a) in droplet or particulate form into a reaction zone and admixing said polymer with a hot inert gas or mixture of hot inert gases in the reaction zoneWherein the weight ratio of gas to polymer is about 1 to about 8 parts of gas per part of polymer; the temperature of the gas is such as to heat the polymer to a temperature in the range of about 800.degree.C. to about 1050.degree.C.; and the residence time in the reaction zone is about 10 to about 100 milliseconds; andC. quenching the recovering product.

Abstract: Olefins, or mixtures of various olefins, are converted to other olefins by contact with a supported molybdenum oxide or tungsten oxide organoaluminum catalyst.

Abstract: A process for the stabilization of indene against discoloration comprising adding to the indene a minor amount of an insoluble compound selected from the group consisting of neutral, acidic and basic inorganic salts, inorganic acids and organic acids.

Abstract: Optically active compounds are prepared from optically inactive unsaturated hydrocarbons by reacting at least one unsaturated hydrocarbon in the presence of a catalyst prepared by combining a nickel compound, a Lewis acid and an optically active phosphine of the general formulaPR'R"R'"in which R', R" and R' " are hydrocarbon radicals, thereby forming optically active compounds having chiral centers formed by the carbon-to-carbon linkages. The optically active compounds can be polymerized to provide optically active polymers.

Abstract: A novel catalyst for hydrodealkylation of alkylaromatic compounds and a process for producing the catalyst are described. The catalyst comprises the compounds formed from either (a) graphite and (b) an alkali metal or (a) graphite, (b) an alkali metal and (c) at least one compound of a metal selected from the group consisting of Group VIII of the Periodic Table. The catalyst of this invention is capable of selectively producing Ar-C.sub.n.sub.-1 H.sub.2n.sub.-1 from Ar-C.sub.n H.sub.2n.sub.+1, wherein Ar is an aromatic radical.

Abstract: A rhenium heptoxide supported on alumina catalyst is prepared by digesting the alumina support with an aqueous solution of ammonium phosphate, ammonium dihydrogen phosphate or diammonium hydrogen phosphate at a temperature in the range ambient to the boiling point of the solution, separating the treated alumina by for example sieving and loading the treated alumina with between 1 and 15% by weight of rhenium heptoxide. The catalyst prepared in this manner is active for the disproportionation of olefinic hydrocarbons.

Abstract: A process for the production of cyclopentene free of C.sub.5 -diene impurities, which comprises metathetically reacting cis,cis-cyclodecadiene-(1,6) with a catalytic amount of a metathesis catalyst comprising a support material and an oxide of an element of Group VI A or VII A of the Periodic Table, at a reaction temperature of from 0.degree.C up to the temperature at which said catalyst decomposes, for a period of time sufficient to form said cyclopentene.