Abstract: The invention relates to methods of treatment comprising administering a compound of the general formula (1): to a patient or a healthy individual.

Abstract: A supported alpha-olefin polymerization catalyst composition is synthesized by reacting (1) a slurry of a solid catalyst carrier in a non-polar solvent, e.g., hexane, with a dialkyl organomagnesium composition; (2) contacting the slurry of step (1) with a chlorinated alcohol; (3) contacting the slurry of step (2) with at least one transition metal compound; (4) removing the non-polar solvent to obtain a dry-flowing powder; and, (5) activating the powder with an activator. The resulting catalyst composition has high polymerization activity in the polymerization of C.sub.2 -C.sub.10 alpha-olefins and exhibits very good higher (C.sub.3 -C.sub.10) alpha-olefin incorporation properties in the copolymerization of ethylene with the higher alpha-olefins.

Abstract: A flashing feed inlet device is used in a vapor/liquid contacting column, such as a distillation column, to decrease the amount of liquid entrainment and maldistribution of vapor occurring when the liquid feed stream is introduced into the column at a temperature and/or pressure conditions higher than those existing in the column. The entrainment of the liquid and the maldistribution of the vapor are decreased by substantially decreasing the linear velocity of the vapor produced by the flashing of the liquid feed stream.

Abstract: A modified supported catalyst for polymerizing alpha-olefins, for example, ethylene, is prepared by combining a chromium compound-containing catalyst with a modifier which is an oxide of an element of Group II A of the Periodic Chart of the Elements. The resulting modified catalyst composition, when used to polymerize alpha-olefins, produces polymer resins having higher values of High Load Melt Index (I.sub.21) than catalyst compositions without the modifier.There is also disclosed a process for polymerizing alpha-olefins, at relatively lower temperatures than was heretofore possible, to obtain resins of relatively high HLMI, using the above-identified modified catalyst composition. The resulting polymers can be used for the fabrication of blow-molded products, e.g., household and industrial containers.

Abstract: The viscosity of the dispersing medium, such as cyclohexane, in the anionic dispersion polymerization of monomers, such as styrene, is increased by adding a higher viscosity inert miscible liquid, such as hexadecane, or a soluble inert solid, or by using a liquid having a viscosity of greater than about 2 cp. The increased viscosity assists in the formation of dispersed polymer particles having a narrower particle size distribution than those produced in the lower viscosity dispersing medium.

Abstract: There is disclosed a catalyst composition for the polymerization of olefins, particularly alpha-olefins. The composition is prepared by synthesizing a catalyst precursor and then combining it with a conventional catalyst activator. The precursor is synthesized by: (a) contacting a solid, porous carrier with an aluminum compound; (b) contacting the resulting product with a mixture of vanadium and titanium compounds; and, (c) contacting the product with an ether.The catalyst composition is used with a conventional activator and, preferably, a halogenating agent in the polymerization medium to produce broad molecular weight distribution, high molecular weight HDPE or medium density, broad molecular weight distribution, high molecular weight resins which can be made into high strength films.

Abstract: A novel cross-linked polymer is obtained by cross-linking polyvinyl alcohol with a cross-linking agent which is a mixture of a phenolic component and an aldehyde or a mixture of a naphtholic component and an aldehyde. The resulting polymer is exceptionally thermally stable and, therefore, can be used as an effective permeability control agent in all enhanced oil recovery operations, including steam flooding.

Abstract: A process for oxidizing a metal from a lower valence state to a higher valence state comprises contacting the metal, usually contained in a solution, with a sufficient amount of an oxygen-containing gas to provide at least about 300% excess of stoichiometric oxygen with respect to the metal at the lower valence state. The metals are preferably used as chelated solutions thereof. Some of the representative metals are iron, copper, manganese, lead or mercury.

Abstract: A catalyst composition for polymerizing alpha-olefins is prepared by reacting a transition metal compound, e.g., titanium, with trimethylaluminum catalyst activator. In a preferred embodiment, the catalyst is supported on a porous refractory support and is prepared by additionally reacting a magnesium compound or an organomagnesium composition with the support.Also disclosed is a process for polymerizing alpha-olefins in the presence of the catalyst of the invention. The polymer products have higher bulk density and produce films of greater strength than polymers prepared with similar catalysts utilizing different alkyl-aluminum activators, e.g., triethylaluminum and tri-isobutylaluminum.

Abstract: A catalyst composition for polymerizing alpha-olefins is prepared by treating a carrier with a mixture of at least one organo-magnesium composition of the formula(OR').sub.n Mg(OR).sub.m (I)where R and R' are the same or different C.sub.1 -C.sub.12 hydrocarbyl groups, m and n are each 0, 1 or 2, m+n=valence of Mg, and a compound of the formulaMX.sub.p (II)where M is Si, C, Ge or Sn, X is Cl or Br, and p is the valence of M, in a solvent capable of dissolving the mixture. The product of this step may or may not be dried. Subsequently, it is contacted with a transition metal compound.The polymer resins produced with the resulting catalyst have relatively narrow molecular weight distribution and high melt index values.

Abstract: A method and apparatus is disclosed for monitoring ice masses wherein a signal transmitter is attached to an ice mass and receivers are used to detect the location of the transmitter.

Abstract: The performance of gas-liquid separators used to separate a liquid from a mixture containing at least one liquid and at least one gas, is enhanced by injecting into the mixture an additive, such as a suitable polymer, capable of imparting viscoelastic properties to the liquid. Suitable separators are those wherein crude oil is separated from a mixture obtained from an underground oil reservoir, the mixture typically containing water, hydrocarbon oil and gas.

Abstract: An olefin, particularly alpha-olefin, supported catalyst composition, containing a transition metal or a compound thereof and an activator, has an average pore diameter of about 20 to about 300 Angstroms, at a substantially constant catalyst particle size for a given range of average pore diameters. The catalyst produces polymers having gradually decreasing molecular weight distribution with decreasing pore size of the catalyst at a constant particle size.

Abstract: A catalyst composition for polymerizing alpha-olefins is prepared by treating a carrier containing OH groups with a liquid solution containing an excess of an organomagnesium composition with respect to the OH groups and contacting the thus-formed magnesium-containing carrier with a hydrocarbyl alcohol and at least one transition metal compound. Prior to contacting the magnesium-containing carrier with the alcohol, most of the liquid must be removed therefrom, so that it comprises not more than about 6% of the liquid. The amount of the transition metal compound is such that the molar ratio thereof to magnesium in the reaction mixture is about 0.3 to about 0.9. Also disclosed is a process for polymerizing alpha-olefins in the presence of the catalyst of the invention.

Abstract: High molecular weight linear block copolymers containing 5 or more alternating blocks of (A) polymerized styrene or alkyl substituted styrene units, and (B) polymerized conjugated diene units, terminated by (A) units, are prepared by anionic dispersion polymerization to give clear polymers having excellent physical properties.

Abstract: A flashing feed inlet device is used in a vapor/liquid contacting column, such as a distillation column, to decrease the amount of liquid entrainment and maldistribution of vapor occurring when the liquid feed stream is introduced into the column at a temperature and/or pressure conditions higher than those existing in the column. The entrainment of the liquid and the maldistribution of the vapor are decreased by substantially decreasing the linear velocity of the vapor produced by the flashing of the liquid feed stream.

Abstract: Broad molecular weight distribution, and high molecular weight olefin polymers, are prepared by polymerizing at least one olefin in the presence of a vanadium - and a titanium-containing catalyst composition. A catalyst precursor is synthesized by contacting a solid, porous carrier sequentially with a metal or a compound of a metal of Group IIB of the Periodic Chart of the Elements, e.g., a zinc compound, a halogen-containing aluminum compound, a vanadium compound and a titanium compound. The precursor is then combined with a suitable co-catalyst and a halogenating agent to produce the catalyst composition used to polymerize olefins.

Abstract: MgO treated with an organic acid, e.g., 2-ethyoxybenzoic acid, is used as a support for an Al-Ti Ziegler catalyst in which the Ti component is the product of an alkanol having 5 to 12 carbon atoms and TiCl.sub.4 to give HDPE with narrow MWD and large particle size for injection molding.

Abstract: A novel cross-linked polymer is obtained by cross-linking polyvinyl alcohol with a cross-linking agent which is a mixture of a phenolic component and an aldehyde or a mixture of a naphtholic component and an aldehyde. The resulting polymer is exceptionally thermally stable and, therefore, can be used as an effective permeability control agent in all enhanced oil recovery operations, including steam flooding.

Abstract: There is disclosed a method of recovering oil from a subterranean oil formation having the vertical thickness of 40 ft or more. The method exploits the effect of gravity on the various slugs of diverse materials injected into the oil column of the formation. The method comprises injecting a surfactant slug into the lower 50-75% of the vertical thickness of the oil column, then injecting a slug of a mobility control polymer into the upper 50-75% portion of the thickness of the oil column, followed by the injection of a slug of a drive fluid over substantially the entire vertical thickness of the oil formation. Optionally, a low-salinity pre-flush slug may be injected to reduce contact of high salinity water with the surfactant slug, and an alkaline pre-treat solution may be injected to precipitate divalent cations prior to the injection of the surfactant slug.