Abstract: There is disclosed a process for hydrotreating a heavy hydrocarbon stream containing metals, asphaltenes, nitrogen compounds, and sulfur compounds to reduce the contents of these contaminants. The process comprises contacting said stream in the presence of hydrogen and under suitable hydrotreating conditions in sequence with a first catalyst in a first reaction zone, a second catalyst in a second reaction zone, and a third catalyst in a third reaction zone. The first catalyst comprises a Group VIB metal and/or a Group VIII metal on a porous inorganic oxide support; the second catalyst consists essentially of at least one hydrogenation metal selected from Group VIB deposed on a support material comprising alumina; and the third catalyst comprises a hydrogenating component comprising molybdenum, chromium, and cobalt on a large-pore, catalytically-active alumina. Each catalyst has specific physical properties.

Abstract: An hydraulic drive apparatus for use in downhole tools is described. The apparatus provides rotational and translational movement to a cutting tool element disposed in a downhole tool or sonde automatically adjusting advancing motion of the cutting tool to the rate of rotational movement or cutting. The apparatus is controllable from the surface through a wireline and is capable of operating in various modes to facilitate unjamming.

Abstract: A process for denitrogenation of high nitrogen content hydrocarbon feeds comprising contacting the feed with hydrogen under denitrogenation conditions in the presence of a catalyst comprising an active metallic component comprising at least one metal having hydrogenation activity and at least one oxygenated phosphorus component and a support component comprising at least one non-zeolitic, porous refractory inorganic oxide matrix component and at least one crystalline molecular sieve zeolite component.

Abstract: Novel glass and graphite filled copolyimides and polyimides useful as engineering plastics are prepared. Also fibers and oriented fibers from the copolyimides and polyimides derived from tetramethylcyclobutane 1,2,3,4-tetracarboxylic dianhydride and diamines are disclosed.

Abstract: A process for mild hydrocracking of hydrocarbon feeds comprising contacting the feed with hydrogen under mild hydrocracking conditions in the presence of a catalytic composition comprising an active metallic component comprising at least one metal having hydrogenation activity and at least one oxygenated phosphorus component, and a support component comprising at least one non-zeolitic, porous refractory inorganic oxide matrix component and at least one shape selective crystalline molecular sieve zeolite component.

Abstract: A comminuted, supported polymerization catalyst for alpha-olefins comprises (A) an organoaluminum compound and (B) a solid titanium-containing component formed by (1) comminuting a solid reaction product comprising (a) at least one halogen-containing compound of titanium(IV); (b) at least one electron donor; and (c) at least one hydrocarbon-insoluble magnesium-containing compound; and (2) retreating such comminuted product with (a) at least one halogen-containing compound of titanium(IV); (b) at least one haloalkylchlorosilane; and (c) at least one organic acid ester.

Abstract: Depleted zones or channels in in situ retorts that bypass unretorted zones can be plugged selectively by contacting the depleted zones in the in situ oil shale retort with an aqueous liquid, substantially free of a formation plugging amount of a solute, to increase the resistance of the depleted zone or channel to the passage of retorting gases.

Abstract: A comminuted, supported polymerization catalyst for alpha-olefins comprises (A) an organoaluminum compound and (B) a solid titanium-containing component formed by (1) comminuting a solid reaction product comprising (a) at least one halogen-containing compound of titanium(IV); (b) at least one electron donor; and (c) at least one hydrocarbon-insoluble magnesium-containing compound; and (2) retreating such comminuted product with (a) at least one halogen-containing compound of titanium(IV); and (b) at least one organic acid ester.

Abstract: A rubber composition containing a phyllosilicate mineral filler is disclosed.

Abstract: Incorporation of above about 50 ppm water into feed of a hydrocarbon conversion process using an AMS-1B crystalline borosilicate-based catalyst alters the product distribution produced in such process.

Abstract: A process for hydrocracking gas oil boiling range hydrocarbon feeds comprising contacting the feed with hydrogen under hydrocracking conditions in the presence of a catalyst comprising an active metallic component comprising at least one metal having hydrogenation activity and at least one oxygenated phosphorus component, and a support component comprising at least one non-zeolitic, porous refractory inorganic oxide matrix component and at least one crystalline molecular sieve zeolite component.

Abstract: A lightweight composite tappet is provided to decrease fuel consumption, attenuate noise, and permit increased speed of operation.

Abstract: An electrochemical process is disclosed for the preparation of high molecular weight copolymers of poly(p-methylenebenzoate) and poly(alkyleneterephthalate) wherein ammonia is used in the electrolysis step. The ammonium salts thus formed are removed by heat decomposition. Copolymers are prepared from the resulting electrolysis product.

Abstract: A lightweight composite rocker arm is provided to decrease fuel consumption, attenuate noise, and permit increased speed of operation.

Abstract: A lightweight composite wrist pin is provided to decrease fuel consumption, attenuate noise, and permit increased speed of operation.

Abstract: There is provided a catalytic composition which comprises a molecular sieve-containing component and a porous refractory inorganic oxide, said component and said refractory inorganic oxide having been intimately admixed with one another, said component comprising a mixture of a crystalline chromosilicate and an oxide of chromium, providing a specific X-ray diffraction pattern, and having the following composition in terms of mole ratios of oxides:0.9.+-.0.2 M.sub.2/n O:Cr.sub.2 O.sub.3 :YSiO.sub.2 :ZH.sub.2 O,wherein M is at least one cation having a valence of n, Y is a value within the range of about 4 to about 200, and Z is a value within the range of about 0 to about 160. There is also provided a method for preparing such a catalytic composition.There is provided a process for the conversion of a hydrocarbon stream, which process comprises contacting said stream at conversion conditions with the above catalytic composition.

Abstract: A comminuted, supported polymerization catalyst for alpha-olefins comprises (A) an organoaluminum compound and (B) a solid titanium-containing component formed by (1) comminuting a solid reaction product comprising (a) at least one halogen-containing compound of titanium (IV); (b) at least one electron donor; and (c) at least one hydrocarbon-insoluble magnesium-containing compound; and (2) retreating such comminuted product with (a) at least one halogen-containing compound of titanium (IV); (b) at least one chlorocarbon; and (c) at least one organic acid ester.

Abstract: A fluid bed retorting process is provided in which solid heat carrier material and solid hydrocarbon-containing material, such as oil shale, tar sand and coal, are fluidly moved in a lateral direction until they spill over an upright barrier into an overflow discharge outlet. The solids can be premixed in the retort before entering the laterally moving fluid bed in a premixing fluidizing chamber or with a conical deflector. Upright annular or transverse baffles can be positioned in the fluid bed to minimize lateral backmixing of solids and can also extend above the surface of the fluid bed to minimize wave propagation. Any unfluidized coarse particles can also be moved laterally by gravity flow and jet deflectors.

Abstract: A liquid dispensing nozzle suitable for use in automobile service stations having vacuum assist vapor recovery systems is disclosed. This nozzle incorporates a check valve for closing the vapor return conduit means at all times when liquid is not being dispensed and a liquid responsive means in the vapor return conduit means for automatically shutting off the dispensing of liquid in the event liquid is aspirated into the vapor return conduit means.

Abstract: Novel Poly[N,N'-(alkyl or aryl)-bis(4,4'-phthalimido)-1,3,4-oxadiazole-2,5-diyls], compositions for fibers, films, coatings and molded objects featuring high strength and high thermal properties with formulation advantages.