Abstract: A catalyst and its use in polymerizing olefins, wherein the catalyst is prepared by contacting a support with a compound of titanium and/or vanadium.

Abstract: Interchange reactions between organosulfides and mercaptans are promoted by the use of catalysts containing Group VIB oxides. The preferred catalysts are supported phospho Group VIB oxide acids, such as phosphotungstic acid and phosphomolybdic acid. The preferred supports are moderately acidic supports that contain aluminum, such as zinc aluminate and aluminum phosphate.

Abstract: A process for the production and use of branched polymers of arylene sulfide in which (A) a reaction mixture of (1) at least one p-dihalo-benzene, (2) at least one alkali metal sulfide, (3) at least one organic amide, (4) water in an amount of about 1.0 mole to about 2.

Abstract: In a shell and tube heat exchanger, cooperation between a shell and shroud within the shell is established by at least one boss extending radially outward from the exterior surface of the shroud and at least one channel on the inside of the shell. The channel has longitudinal and circumferential path portions which are adapted to receive the boss so as to allow for longitudinal and radial temperature expansion without incurring undesirable stresses on either the shell or the shroud. The shroud is disclosed as further including at least one longitudinally extending alignment guide which enables cooperation with guide rails associated with a tube bundle positioned within the shroud.

Abstract: Multiple materials are bonded together by means of an RF-sensitized bonding film or sheet, wherein the RF-sensitized bonding film or sheet is inserted at an intermediate position adjacent to the multiple materials to be bonded, and exposed to a dielectric field for such period of time so as to effect fusion or sintering of the RF-sensitized bonding film or sheet to the multiple materials so as to bond the multiple materials together and form a laminated structure.

Abstract: A decomposable molybdenum compound selected from the group consisting of a mixture of a molybdenum dithiophosphate and a molybdenum carboxylate and a mixture of a molybdenum dithiocarbamate and a molybdenum carboxylate is disclosed. The decomposable molybdenum compound may be added, in a hydrovisbreaking process, to a hydrocarbon-containing feed stream prior to contacting the feed stream with hydrogen under suitable hydrovisbreaking conditions.

Abstract: Novel compositions of matter include: mixed oxides of (a) at least one oxide of chromium, at least one oxide of manganese and at least one oxide of magnesium, Lanthanum Series Metals, preferably lanthanum and cerium, and/or niobium; (b) at least one oxide of chromium, at least one oxide of calcium, strontium, tin and/or antimony, at least one oxide of manganese and at least one oxide of magnesium, Lanthanum Series metals and/or niobium; (c) at least one oxide of chromium, at least one oxide of iron and at least one oxide of magnesium, Lanthanum Series metals and/or niobium; and (d) at least one oxide of chromium, at least one oxide of iron, at least one oxide of manganese and at least one oxide of magnesium, Lanthanum Series metals and/or niobium. These compositions are particularly effective as catalyst compositions for the conversion of C.sub.3 and C.sub.

Abstract: Compositions of matter comprise oxides of silicon, aluminum and/or titanium mixed with combinations of manganese oxide and magnesium oxide; iron oxide and magnesium oxide; calcium, strontium, barium, tin and/or antimony oxides, manganese oxide and magnesium oxide; and iron oxide, manganese oxide and magnesium oxide. These compositions are particularly useful as catalysts for selectively converting propane and butanes to ethylene and ethane and particularly to ethylene. A method for converting propane and butanes to less saturated hydrocarbons is also disclosed in which the catalyst life is extended and the selectivity to ethylene and ethane, particularly ethylene, is improved by carrying out the contacting with the catalyst in the presence of steam, when the catalyst contains an oxide of iron and, optionally, when the catalyst does not contain an oxide of iron.

Abstract: A ternary polymer alloy containing a poly(arylene sulfide), a poly(amide imide), and at least one of a poly(aryl ketone) and a poly(aryl sulfone). The polymer alloy optionally can contain a fibrous reinforcing material such as a glass fiber.

Abstract: Carboxyalkyl dithiocarbamates which can be characterized by the formula ##STR1## wherein R is selected from the group consisting of alkylene radicals, wherein R' is selected from the group consisting of hydrogen and methyl and ethyl radicals, R.sup.2 is selected from the group consisting of alkylene radicals and wherein M is selected from the group consisting of ammonium and alkali metal atoms, their use as ore flotation depressants, and a process for making these novel compositions are disclosed.

Abstract: Overloading of a plurality of turbine drivers driving compressors in a plurality of compression cycles, such as the compression of refrigerants and the compression of normally gaseous feed in a method for cryogenically cooling such normally gaseous feed, due to changes in compressor limiting operating conditions, is prevented by measuring the suction pressures to the low pressure stages of the compressors, deriving a desired feed flow rate in response to each of such measured suction pressures, selecting the lowest desired feed flow rate (which will be derived in response to the highest measured suction pressure if all set points are equal), and adjusting the feed gas flow rate in response to the lowest flow rate. In a preferred embodiment, a manual set point representing a maximum feed gas flow rate is also applied and the selected feed rate is dictated by the highest suction pressure or the maximum feed rate, whichever is lower, and is utilized to adjust the feed rate.

Abstract: Apparatus for use in a fluid separation vessel to improve the separation of liquids of different densities which includes a tubular conduit extending upwardly a distance from a liquid outlet in the bottom of the vessel, a vertical center plate disposed across the open upper end of the tubular conduit, a pair of mutually parallel vertical side walls on opposite sides of the tubular conduit mounted perpendicular to the center plate, and a horizontal baffle plate mounted on the upper edges of the center plate and the vertical side walls.

Abstract: A method of rotationally molding hollow articles from cross-linkable polymeric material wherein the mold and molding material are simultaneously revolved about two nonparallel axes while being heated to fuse and cross-link polymeric material. When the polymeric material is partially cross-linked the mold containing the hollow article is opened at at least one location to admit heated air circulated therethrough to facilitate cross-linking of the inner portion of the molded tubular article and produce a smooth inner surface therein. Also disclosed is apparatus for performing the molding method of the invention.

Abstract: An improved universal expansion joint having counterthrust means for controlling pressure-induced expansion. Movable bellows means in the form of one or more expansible bellows or one or more contractile fluid power cylinders are disclosed for applying counterthrust force to the expansion joint. Means responsive to the pressure within the expansion joint or the temperature of or the strain on the conduit connected to the expansion joint are disclosed for applying the desired fluid pressure to the bellows means to achieve the proper counterthrust force. Also disclosed are a method of employing the improved expansion joint and a system in which the improved expansion joint is advantageously utilized.

Abstract: Process for the production of the insect sex attractant, gossyplure, is provided. The process comprises first disproportionating 1,5-cyclooctadiene and 1-hexene to give 1,5,9-tetradecatriene, then metallating the triene to form a 1-metallo-5,9-tetradecadiene, and finally treating the organometal compound with a C.sub.2 -synthon to give directly 7,11-hexadecadienyl acetate or a substituted 7,11-hexadecadienyl moiety which can readily be converted to the desired acetate.

Abstract: A longitudinally expansible and contractible duct characterized by the employment of a pair of expansible and contractible bellows protected by internal, thermally insulated, baffles which are slidably secured to the external shell members of the duct to accommodate differential thermal expansion both longitudinally and radially of the duct.

Abstract: Catalyst composition is provided which is prepared by impregnating high surface area, high pore volume alumina with at least one magnesium compound convertible to the oxide, and, optionally, at least one alkali metal compound which is convertible to the oxide, and/or at least one zirconium compound convertible to the oxide, then subjecting the impregnated support to an oxygen-containing atmosphere under conditions suitable to convert at least a portion of the magnesium, alkali metal and zirconium compounds to the oxide form. The resulting catalyst is an effective double bond isomerization catalyst, and also greatly enhances the disproportionation activity of disproportionation catalysts when used in combination therewith.

Abstract: A process for in situ simulation of diagenetic processes in a subterranean formation is provided. A mineral substrate is placed in the formation of interest in a sealed vessel. The vessel is opened so as to expose the mineral substrate to formation fluids. After sufficient time for the formation fluids to act upon the mineral substrate, the substrate is removed from the formation and is examined for physical and chemical effects indicative of porosity changes in the formation.

Abstract: A catalytic cracking apparatus comprises a catalyst lift pot having a first diameter, a riser-reactor having a mouth connected to the lift pot and defining a second diameter which is smaller than the first diameter, and a plug member which axially extends into the lift pot from the lower end thereof. The riser-reactor and plug member are situated so that fluid flowing through the lift pot before flowing into the riser-reactor flows radially inward across an upper end surface of the plug member. The apparatus further comprises a device for introducing a fluidizable catalyst through a sidewall of the lift pot, and a device for releasing liquid oil feedstock and atomizing fluid into the lift pot from the upper end surface of the plug member.

Abstract: Polymerization catalyst consisting essentially of treated silica support and zerovalent chromium compound is provided, as well as process for preparation and polymerization process with the invention catalyst. Silica treatment involves contacting a predominantly silica-containing support with at least one compound selected from the group consisting of Group IIA oxide or compounds convertible to the oxide form, a Group VA or VB oxide or compounds convertible to the oxide form or sulfuric acid, and calcining prior to contacting the treated support with a zerovalent chromium compound, thereby producing an active polymerization catalyst.