Abstract: Olefinic hydrocarbons containing from 2 to about 6 carbon atoms may be oligomerized to provide selective olefins by treatment with a catalyst comprising a metal halide intercalated in a carbon matrix. The oligomerization may be effected at temperatures ranging from about 50.degree. to about 350.degree. C. and a pressure in the range of from about 500 to about 2000 psig in the presence of a catalyst such as antimony fluoride intercalated in graphite.

Abstract: A process is disclosed for the production of alkylaromatic hydrocarbons by the alkylation of an aromatic hydrocarbon, such as benzene, with a C.sub.8 -plus acyclic olefin which preferably is a normal olefin. The hydrocarbonaceous effluent of the alkylation reaction zone is separated by fractional distillation to yield both a product stream containing monoalkylated aromatics and a small bottoms stream containing dialkylated aromatics and other high boiling compounds but which is substantially devoid of the product monoalkylated aromatics. The product stream is a portion of a sidecut stream withdrawn from the first of two vacuum columns, with a second portion of the sidecut being passed into the second column. The bottoms stream of the first column is also passed into the second column and the overhead vapor of the second column enters an upper portion of the first column.

Abstract: This is a separation process employing a column of adsorbent which is divided sequentially into at least three zones, adsorption, purification and desorption zones. A net fluid flow is maintained through the column with the adsorbent moving actually or in a simulated manner countercurrent with respect to the fluid. The feedstock contains the components to be separated with one component being more selectively adsorbed in the adsorption zone by the adsorbent than the other components. A desorbent fluid effects desorption of the more selectively adsorbed component in the desorption zone, however, if carried over into the adsorption zone with the moving adsorbent the desorbent impedes adsorption. The process employs a flush stream introduced at the upstream boundary of the desorption zone, with the desorbent introduced between the upstream and downstream boundaries of that zone, which flushes the desorbent from the adsorbent prior to its movement into the adsorption zone.

Abstract: An FCC sulfur oxide acceptor, its method of manufacture and use in the FCC process. The acceptor, a particulate solid containing magnesium, sodium and aluminum, the precursor of which comprises a mixture of precipitates. One precipitate is a compound of aluminum and another is a compound of magnesium. The precipitates are simultaneously precipitated from a common solution in which they have a highly limited solubility.

Abstract: Surface-metallated aluminas and silicas are species many of whose physical properties, such as surface and pore volume, are unchanged but which exhibit superior hydrothermal stability. Suitable for use as catalytic supports, these materials can be simply prepared by treating the alumina or silica with a tetrahalide of a metal, such as titanium or zirconium, removing the unreacted tetrahalide, and calcining the resulting material in a moist atmosphere.

Abstract: Although poly(nitrilo-1,4-phenylene nitrilomethylidine-1,4-phenylene methylidine) is an insulator, it can be doped with both electron acceptors and electron donors to afford p- and n-type semiconductors. The iodine doped material is more stable in air than many prior art conducting polymers.

Abstract: Aromatic ketones may be prepared by subjecting an alkyl aromatic compound containing more than one carbon atom in the alkyl substituent to an electrical energy which includes a direct electrical current in the presence of a nucleophile such as an organometallic oxide, a solvent and a reaction initiator such as an alkali metal hydroxide and a quaternary ammonium hydroxide to produce a ketal, following which the ketal may be converted to the desired ketone by hydrolysis.

Abstract: Dehydrogenatable hydrocarbons are dehydrogenated by contacting them, at dehydrogenation conditions, with a catalytic composite comprising a combination of catalytically effective amounts of a platinum group component, a nickel component, and a zinc component with a porous carrier material. A specific example of the nonacidic catalytic composite disclosed herein is a combination of a platinum group component, a nickel component, a zinc component, and an alkali or alkaline earth component with a porous carrier material in amounts sufficient to result in a composite containing about 0.01 to about 2 wt. % platinum group metal, about 0.05 to about 5 wt. % nickel, about 0.01 to about 5 wt. % zinc, and about 0.1 to about 5 wt. % alkali metal or alkaline earth metal.

Abstract: A process for separating a normal paraffin hydrocarbon from a mixture of the same with a cyclic and/or branched chain paraffin hydrocarbon. The process comprises contacting the mixture at a temperature of from about 120.degree. C. to about 140.degree. C. with a zeolite free molecular sieve comprising silicalite. The normal paraffin hydrocarbon is selectively retained and will preferably be recovered from the molecular sieve by displacement with a displacement material.

Abstract: A process for the separation of normal C.sub.4 hydrocarbons from isobutylene. A mixture of the normal C.sub.4 hydrocarbons and isobutylene is contacted with a molecular sieve comprising silicalite which is selective for the normal C.sub.4 hydrocarbons. The isobutylene is then recovered in the raffinate stream and the normal C.sub.4 hydrocarbons recovered by displacement with pentene-1.

Abstract: Apparatus for making plastic screen panels, and especially abrasion-resistant mining screens, includes a large rotary screen drum member on which an extruded, profiled cross-section screen surface-forming wire is helically wound at a pitch which will produce the desired screen slot width. Immediately adjacent the drum member is a rod-positioning mechanism from which a plurality of screen panel support rods are sequentially fed from a stack and welded to the wires on the drum surface in a direction parallel to the drum axis and transverse to the surface wires. The welding is done with a double-edged heater bar which is temporarily placed in contact with the rod and drum before the rod is forced against the drum. The screen drum is indexed after each support rod is attached to it by an angular amount sufficient to provide the desired spacing on the finished panel.

Abstract: A process for the recovery of hydrocarbonaceous oil from oil shale is disclosed. The process comprises: (a) heating the shale in the presence of a gas comprising hydrogen sulfide at subcritical conditions of said gas including a temperature from about 650.degree. F. to about 825.degree. F. to produce a solvent extractable material and to liberate at least a first portion of the hydrocarbon contained therein; and (b) contacting the resulting solvent extractable material with a normally-liquid solvent at subcritical, reflux conditions of said solvent to liberate at least a second portion of the hydrocarbon contained in the solvent extractable material.

Abstract: Anti-rattle track fitting for anchoring loads to slotted seat tracks has a vertically movable shear pin at its forward end and a rotationally adjustable threaded stud at its rearward end. The shank of the adjustable stud extends above the fitting and supports a stop collar which prevents excessive loosening of the stud while permitting the stud to be tightened so as to force it into engagement with the lips of the floor track. The shank is hidden from view by being inside the rear leg of a seat but a slot(s) at its upper end is engageable through a small aperture in the rear surface of the leg.

Abstract: In the manufacture of tubing, and particularly finned tubing, for use by the heat transfer industry in the manufacture of heat exchangers, annealed ends and lands are desirable in certain applications to facilitate the assembly of the tubes to headers and baffles by expanding techniques. Such spot-annealed portions can be produced on a continuous basis by the described apparatus and method in which the moving tube is passed through a heating chamber which reciprocates on a carriage in the direction of tube movement. The heating chamber has a pair of power-actuated, current-carrying clamps which grip spaced portions of the tube so as to resistance-heat the tube portion between the clamps. The heating chamber and carriage move with the tube while it is clamped to provide sufficient heating time. The carriage then returns to its starting position. If desired, an inert gas can be supplied to the heating chamber to prevent oxidation and/or discoloration.

Abstract: Alkali metal salts of C-nitrosoarylamines may be readily reduced in aqueous solution by a reducing sugar. The reaction affords the corresponding aminoarylamine in good yield with little, if any, byproduct formation and affords a method of preparing aminoarylamines without isolation of the C-nitrosoarylamine.

Abstract: Low profile resilient suspension utilizes a pair of horizontally positioned, adjustably tensioned springs to support the weight of a seat occupant. The springs are mounted to one of the movable or fixed seat frame members so as to be completely independent of the linkages, such as scissors links, which guide the movable seat frame member for generally vertical parallel movement relative to the base frame member and floor. The tension of the springs can be adjusted by weight adjustment control members fixed to one of their ends to accommodate occupants of differing weights. The adjustment can be made when the seat is either occupied or unoccupied. The weight adjustment control members remain fixed relative to the seat frame as the suspension oscillates vertically. The opposite ends of the springs are mounted to the ends of the short arms on a pair of connected bellcrank levers which are pivoted to one of the seat frame members.

Abstract: A method for the in situ conversion and recovery of heavy hydrocarbonaceous crude oil containing indigenous trace metal from two adjacent non-communicating hydrocarbon reservoirs which are alternately pressured and recovered which method comprises: (a) heating the heavy hydrocarbonaceous crude oil in a first reservoir to a hydrocarbon conversion temperature; (b) contacting the first reservoir with elemental essentially-anhydrous hydrogen at a pressure from about 200 to about 10,000 psig; (c) heating the heavy hydrocarbonaceous crude oil in a second reservoir to a hydrocarbon conversion temperature; (d) depressuring the first reservoir to yield an effluent comprising hydrocarbonaceous crude oil and unreacted elemental hydrogen; (e) separating the effluent from the first reservoir to recover a hydrocarbonaceous crude oil and a gaseous component comprising elemental hydrogen; (f) contacting the second reservoir with elemental essentially-anhydrous hydrogen, a portion of which is recovered in step (e), at a press

Abstract: A method is disclosed for hydrocracking a hydrocarbon feedstock having a propensity to form polynuclear aromatic compounds without excessively fouling the processing unit. The hydrocracking method includes contacting the hydrocarbon feedstock with a crystalline zeolite hydrocracking catalyst, contacting at least a portion of the resulting unconverted hydrocarbon oil containing polynuclear aromatic compounds with an adsorbent which selectively retains polynuclear aromatic compounds and recycling unconverted hydrocarbon oil having a reduced concentration of polynuclear aromatic compounds to the hydrocracking zone.

Abstract: A contaminating metal on a cracking catalyst used for the cracking of hydrocarbons is passivated by contacting the catalyst with a hydrocarbon gas or mixture of gases comprising molecules of three carbon atoms or less at passivation reaction conditions prior to the cycling of the catalyst to the cracking zone. The cracking catalyst comprises crystalline aluminosilicate contained in a substantially alumina-free inorganic oxide matrix.

Abstract: Alkyl phenyl ethers may be induced to undergo thermal rearrangement on an alumina catalyst to afford the isomeric ortho-alkylphenol. Such rearrangement generally occurs under milder conditions than does the alkylation of a phenol with an olefin using the same alumina as an alkylating catalyst. Yields frequently are high with good selectivity.