Abstract: A process is disclosed for dealkylating durene under elevated temperatures and pressures with a polynuclear aromatic compound. The dealkylation is carried out in the presence of a carbon-containing molecular sieve.

Abstract: A process is described for rejuvenating a coke-deactivated noble metal-containing zeolite catalyst material which comprises sulfiding the deactivated catalyst material by contacting with a sulfiding agent such as hydrogen sulfide-containing gas, removing coke from the sulfided catalyst by contacting the catalyst with oxygen in the presence of sulfur dioxide, and thereafter reducing the catalyst in the presence of a reducing agent such as hydrogen. The process permits catalyst reactivation by burning off coke from the catalyst while avoiding excessive agglomeration of the noble metals thereon.

Abstract: A stereo-differentiating catalyst containing Group VIII metal is prepared by contacting a Group VIII metal-containing acidic zeolite with an optically active amine. Methods are disclosed for utilizing the catalyst in hydrocarbon conversion processes, e.g., hydrogenation and hydroformylation.

Abstract: Yield selectivity of a multibed catalytic reformer operating below design capacity is enhanced by adjusting inlet temperature of at least one catalyst bed to near-quenching conditions while adjusting the inlet temperature of at least one catalyst bed to favor yield selective reforming reactions. Significant increases in C.sub.5 + yields are obtained without any modification of the reforming unit.

Abstract: Lubricating oil stocks produced by methods such as catalytic dewaxing or hydrocracking, comprising hydroprocesses, are stabilized against oxidation by the addition of hydrogen sulfide to the hydroprocessing hydrogen-containing feed using hydroprocess effluent as a source of said hydrogen-containing feed. The H.sub.2 S present in the hydrogen-containing feed saturates olefins that contribute to oxidation instability and restores antioxidant sulfur compounds such as thiols to the lube stock.

Abstract: This specification discloses a process for the alkylation of aromatics utilizing ZSM-23 catalyst. A particularly preferred embodiment utilizes ZSM-23 made from a forming mixture containing amorphous precipitated silica, as a silica source, including trace amounts of alumina and sodium chloride.

Abstract: Water soluble oxygenates of Fischer-Tropsch synthesis separated from water and acids are sequentially converted by a dehydration catalyst and a special zeolite catalyst to provide a product containing a major proportion of middle distillate.

Abstract: There is disclosed an organic cation R.sup.+, designated Diquat-7, having the formula:(CH.sub.3).sub.3 --N.sup.+ --R.sub.1 --N.sup.+ --(CH.sub.3).sub.3wherein R.sub.1 is a saturated or unsaturated straight chain hydrocarbon group containing seven carbon atoms. There is also disclosed a method of preparing Diquat-7, and salts and hydroxide thereof.

Abstract: As synthesized by conventional technique, zeolite ZSM-5 is crystallized in the presence of substantial amount of tetraalkylammonium cations, the alkyl groups of which contain 2 to 5 carbon atoms, such as, for example, tetrapropylammonium. When synthesized in the conventional way, ZSM-5 contains tetraalkylammonium cations as well as a substantial amount of sodium ions. To obtain a more catalytically active form of ZSM-5, the sodium ions must be exchanged to very low levels. By synthesizing zeolite ZSM-5 according to the present method, i.e., in the presence of a combination of an amine and a halide in the presence of a mutual solvent and with a specifically defined reaction mixture composition, ZSM-5 having different organic nitrogen-containing cations but the same crystal structure as conventionally prepared ZSM-5 is obtained. The ZSM-5 prepared in accordance herewith is very low in sodium content as synthesized and has a crystal size of from about 0.05 microns to about 20 microns.

Abstract: In an ethanol fermentation process in which an aqueous solution of fermentable sugar is converted by an ethanol-producing microorganism such as a yeast to a dilute aqueous solution of ethanol with the ethanol being present in the solution at a concentration which does not exceed a predetermined maximum level, an improvement is provided which comprises selectively sorbing ethanol present in the solution within a hydrophilic crystalline aluminosilicate zeolite so that the non-sorbed ethanol present in the solution does not exceed the predetermined maximum level of concentration therein, and thereafter removing sorbed ethanol from the zeolite.

Abstract: Certain organometallic precursors selectively interact with surface hydroxyl groups on an inorganic oxide support such as silica, alumina or silica-alumina or to provide a uniform distribution of metal complexes on the surfaces of said support. Subsequent reduction of the support results in a high dispersion of uncomplexed metal centers to which other organometallic precursors are subsequently attached. The substantially attached organometallic precursors may be reduced and/or sulfided to yield a highly active hydrogenation catalyst having a plurality of metal species in a highly dispersed distribution.

Abstract: Highly specific catalyst compositions are provided, comprising zeolites containing a photoassisting material, which is capable of catalyzing photoassisted heterogenous catalytic reactions within the zeolite structure. The photoassisting material can be sorbed by the zeolite or incorporated directly within the zeolitic framework.

Abstract: An improved method of synthesizing ZSM-23 zeolitic material is disclosed and claimed. The method comprises preparing a reaction mixture which comprises sources of an alkali metal, an oxide of aluminum (Al.sub.2 O.sub.3), an oxide of silicon (SiO.sub.2), water and a nitrogen-containing organic cation R.sup.+, and having the following composition, in terms of mole ratios:______________________________________ Broad Preferred ______________________________________ SiO.sub.2 /Al.sub.2 O.sub.3 40 to 5000 50 to 2000 H.sub.2 O/SiO.sub.2 5 to 200 20 to 100 OH.sup.- /SiO.sub.2 0 to 0.60 0.10 to 0.40 M.sup.+ SiO.sub.2 0.01 to 2.0 0.10 to 1.0 R.sup.+ /SiO.sub.2 0.01 to 2.0 0.05 to 1.0 ______________________________________wherein M.sup.+ is a cation of an alkali or alkaline earth metal and R.sup.+ is an organic cation of the formula (CH.sub.3).sub.3 N.sup.+ --R.sub.1 --N.sup.+ (CH.sub.3).sub.3 wherein R.sub.

Abstract: This specification discloses a process for the production of oxygenated compounds, more specifically aldehydes and alcohols, by reacting an olefin with hydrogen and carbon monoxide in the presence of, as a ctalyst, an insoluble polymer containing a functional group, which may be an amine, thiol, phosphine, or arsine group, having chemically bonded thereto a metal of Group VIII of the Periodic Table. The metal can be, for example, rhodium, cobalt, or ruthenium. The olefin can contain more than one carbon-to-carbon double bond, may be an open chain or a cyclic olefin, and may be substituted. Further, the olefin may be contained in a refinery stream such as a cracked gasoline. The reaction may be carried out in the presence of a polar solvent.

Abstract: Hydrocarbons are processed in a co-current flow packed catalyst bed reactor containing one or more redistribution means, e.g., redistribution screens, in the packed catalyst bed. If more than one redistribution means are used, they are spaced within the bed of catalyst over a predetermined distance. Optionally, the surface area of the redistribution means is less than the cross-sectional surface area of the reactor bed to allow for packing of a relatively smaller size solid particles, as compared to the rest of the catalyst in the bed, in the area between the edge of the redistribution means and the inner wall of the reactor means. The use of the redistribution means prevents channeling of the reactants near the reactor wall region, and assures uniform distribution of the reactants throughout the packed catalyst bed. The invention is applicable to relatively low velocity systems operating at liquid linear velocity of 0.3 cm/sec. or less.