Abstract: A solid cocatalyst is prepared by reacting a suitable support base with an organoaluminum compound and then reacting that product with an activity promoting amount of water. The solid cocatalyst can be combined with a polymerization catalyst to form a catalyst system useful for the polymerization of olefins.

Abstract: A process for the disproportionation of pentane to alkanes containing fewer carbon atoms per molecule and alkanes containing more atoms per molecule in the presence of a catalyst composition containing hydrogen fluoride (HF), titanium tetrafluoride (TiF4) and sulfolane.

Abstract: A method for preparing tapered block copolymers which are particularly useful for blend components in blends with polymers of styrene. In the first embodiment of this invention the copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomers in the presence of a randomizer; (2) an initiator and monovinylaromatic monomers; (3) a mixture of monovinylaromatic and conjugated diene monomers; and (4) a coupling agent; to produce a polymodal tapered block copolymer. In a second embodiment of the invention tapered block copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomers in the presence of a randomizer; (2) an initiator and monovinylaromatic monomers; (3) a mixture of monovinylaromatic and conjugated diene monomers; (4) a mixture of monovinylaromatic and conjugated diene monomers; and (5) a coupling agent; to produce a polymodal tapered block copolymer.

Abstract: A method for preparing tapered block copolymers which are particularly useful for blend components in blends with polymers of styrene. In the first embodiment of this invention the copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomers in the presence of a randomizer; (2) an initiator and monovinylaromatic monomers; (3) a mixture of monovinylaromatic and conjugated diene monomers; and (4) a coupling agent; to produce a polymodal tapered block copolymer. In a second embodiment of the invention tapered block copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomers in the presence of a randomizer; (2) an initiator and monovinylaromatic monomers; (3) a mixture of monovinylaromatic and conjugated diene monomers; (4) a mixture of monovinylaromatic and conjugated diene monomers; and (5) a coupling agent; to produce a polymodal tapered block copolymer.

Abstract: A catalyst composition, a process for producing the composition and a hydrocarbon conversion process for converting a saturated hydrocarbon to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises a zeolite having incorporated therein a promoter comprising carbon and a metal or metal oxide. The composition can be produced by incorporating a metal compound into the zeolite followed by thermal treatment of the resulting zeolite with a hydrocarbon. The hydrocarbon conversion process comprises contacting a fluid which comprises a saturated hydrocarbon with the catalyst composition under a condition sufficient to effect the conversion of a saturated hydrocarbon to a C6 to C8 aromatic hydrocarbon.

Abstract: Substituted metallocenes which have a substituent selected from the group consisting of aryl alkyl, aryl alkyl silyl, and aryl silyl groups, catalyst systems resulting from the combination of such metallocenes and a cocatalyst, and for producing olefins using such catalyst systems.

Abstract: A process and apparatus for passing a polymerization effluent, comprising solid polymer, unreacted monomer, diluent and minor amounts of contaminants, to a high pressure flash where most of the fluid components are flashed and wherein a slip stream comprising diluent and minor amounts of monomer is separated from the bulk of the flashed fluid components. The slip stream is subjected to olefin removal to give an essentially olefin-free stream for recycle to a catalyst mud preparation area. The bulk of the flashed fluid components are recycled directly back to the polymerization zone without expensive olefin removal, although treatment to remove other contaminants can optionally be performed. The polymer and entrained fluid is passed to a low pressure flash zone where the fluids are flashed off, compressed and joined with the flash from the high pressure flash tank.

Abstract: Polymerization processes for ethylene and at least one mono-1-olefin comonomer having from about three to eight carbon atoms per molecule in the presence of a twice-aged catalyst system comprising chromium supported on a silica-titania support and a trialkylboron compound is provided. Novel ethylene copolymers also are produced.

Abstract: A method of preparing a catalyst system which comprises mixing a first solid material comprising at least one perfluoroalkylsulfonic acid salt with a second solid material comprising at least one silanol comprising hydroxy groups and silicon to form a gel comprising silica and the at least one perfluororalkylsulfonic acid salt, and contacting the gel with an acidic solution to convert at least a portion of the at least one perfluoroalkylsulfonic acid salt to at least one perfluoroalkylsulfonic acid is disclosed.

Abstract: A hydrocarbon feedstock containing C5 olefins, C5 diolefins, CPD, DCPD, and aromatics is processed by the steps of heating a hydrocarbon feedstock containing CPD, DCPD, C5 diolefins, benzene, toluene, and xylene in a heating zone, to dimerize CPD to DCPD, thereby forming a first effluent; separating the first effluent into a C6+ stream and a C5 diolefin stream; separating the C6+ stream into a C6-C9 stream and a C10+ stream; separating the C10+ stream into a fuel oil stream and a DCPD stream; and hydrotreating the C6-C9 stream to thereby form a BTX stream.

Abstract: Particulate sorbent compositions comprising a mixture of zinc oxide, silica, alumina and a substantially reduced valence nickel are provided for the desulfurization of a feedstream of cracked-gasoline or diesel fuels in a desulfurization zone by a process which comprises the contacting of such feedstreams in a desulfurization zone followed by separation of the resulting low sulfur-containing stream and sulfurized-sorbent and thereafter regenerating and activating the separated sorbent before recycle of same to the desulfurization zone.

Abstract: A process for polymerizing ethylene feedstock to produce branched polymer of ethylene suitable for blow molding applications and having improved environmental stress crack resistance (ESCR). For example, a catalyst comprising chromium on silica is (1) calcined in air and (2) reduced in carbon monoxide and then used with hydrogen to polymerize ethylene feedstock.

Abstract: A catalyst composition, a process for producing the composition, and a hydrotreating process for converting a hydrocarbon stream such as, for example, gasoline, to olefins and C6 to C8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The catalyst composition comprises a zeolite, a clay, and a promoter. The process for producing the composition comprises the steps: (1) combining a zeolite with a clay and a promoter under a condition sufficient to bind the clay to the zeolite to produce a clay-bound zeolite; and (2) heating the clay-bound zeolite to produce a modified zeolite. The hydrotreating process comprises contacting a hydrocarbon stream with the catalyst composition under a condition sufficient to effect the conversion of a hydrocarbon to an olefin and a C6 to C8 aromatic hydrocarbon.

Abstract: A process comprising polymerizing ethylene, or polymerizing ethylene and at least one other olefin, to produce a polymer is provided.

Abstract: A process comprising reacting at least one polymer component, with at least one reactive component, to produce a composition, the polymer being a metallocene polymerized ethylene (co)polymer, and the reactive component being a crosslinking agent.

Abstract: A computer implemented method for mapping seismic attributes derived from analysis of isochron measurements is disclosed. According to the disclosed method planar surfaces, which model the upper and lower surface of a subterranean layer, are numerically inserted in a seismic data volume with the edges of the planar surfaces connecting reflection events of a three-by-three array of seismic traces. Using the model surfaces, isochron attributes are calculated including the amount of isochron thickening or thinning in the direction of dip, and the azimuth of maximum thickness change. The thus calculated attributes are written to data cubes, which can be displayed in a variety of ways.

Abstract: Described is a process for separating sulfone from a hydrocarbon having a small concentration of said sulfone by use of water as an extraction solvent.

Abstract: A hydraulic underreamer for enlarging a wellbore includes improved packer, cutting, jet pump, and mill sections. Each of the sections and their associated advantages are described herein in detail. The packer section is designed to minimize wear on its sealing elements, the cutting and jet pump sections are designed to minimize pressure requirements and optimize hydraulic efficiency, and the mill section has a removable center assembly which allows effective well control when pulling the underreamer out of a “live” well filled with a gas, such as methane.

Abstract: Selectively producing organic trisulfides by contacting, in the presence of a catalyst, a mercaptan and a sulfur compound under conditions sufficient to produce a organic polysulfides and hydrogen sulfide and controlling the concentration of hydrogen sulfide in the liquid reaction solution during specific reaction periods such that the production of organic trisulfide is enhanced and the production organic polysulfides having more or less than three sulfur atoms is inhibited.

Abstract: A process is provided to recover poly(arylene) sulfide from a poly(arylene) sulfide reaction mixture. In particular, a process is provided to recover poly(arylene) sulfide utilizing at least one extraction agent followed by vacuum drying.