Catalysts for the polymerization of ethylene and the copolymerization of ethylene with other olefins have been prepared by depositing an organo-chromium compound on a silica support which has been fluorided at low temperatures.

Olefin polymerization process and catalyst therefor

In a process of producing a conjugated diene such as butadiene by a catalytic oxidative dehydrogenation reaction of a monoolefin such as n-butene, an object of the present invention is to provide a process by which an operation can be conducted more safely and a conjugated diene can be stably produced at a higher yield. The present invention relates to a process of producing a conjugated diene including a step of mixing a raw material gas containing a monoolefin having a carbon atom number of 4 or more with a molecular oxygen-containing gas and supplying the mixture into a reactor, and a step of obtaining a corresponding conjugated diene-containing product gas produced by the oxidative dehydrogenation reaction of the monoolefin having a carbon atom number of 4 or more in the presence of a catalyst, wherein the concentration of a combustible gas in the gas supplied to the reactor is not less than the upper explosion limit and the oxygen concentration in the product gas is from 2.5 to 8.0 vol%.

Production process of conjugated diene

The invention comprises a vial closure device, a sample vial incorporating such a vial closure device, and certain methods of using such a vial and closure device. The vial and closure device are intended to contain a gaseous sample or a headspace gas present above a liquid or solid material, so that the gaseous sample or headspace gas can be conveniently analysed, typically by means of an autosampler connected to an analytical instrument such as a mass spectrometer. Mass spectrometric methods of determining the isotopic composition of hydrogen and oxygen comprised in aqueous samples contained in vials fitted with such closure devices are disclosed. The vial closure device comprises a hollow body member locatable in the mouth of a vial, and a first seal for making a substantially gas-tight seal between the exterior of said hollow body member and said vial. The hollow body member comprises an aperture and an aperture closing means for closing said aperture when required, and a second seal, through which a gas sampling means may be inserted. The aperture closing means is operable to open the aperture by the insertion of a gas sampling means through the second seal and is operable to close the aperture when the gas sampling means is withdrawn.

Sample vial and vial closure device for use in gas analysis and method of using the same

Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst produced by combining a metal, such as tungsten or a tungsten compound, with a halosilane by adding either water or silica to the suspension of metal and halosilane and then heating to activate the catalyst

Olefin metathesis and catalyst

The present invention provides for on-site capture of carbonaceous gas at sea, for isotopic examination to enable prediction of hydrocarbon potential of an earth formation underlying a body of water.

Predicting hydrocarbon potential of an earth formation underlying a body of water by analysis of seeps containing low concentrations of carbonaceous gases

Water samples having a predetermined concentration of deuterium are equilibrated with a hydrogen containing reagent at such conditions as to allow migration of hydrogen and deuterium ions between the reagent and water. The reagent is then analyzed to determine the isotope ratio of molecules containing deuterium to those containing hydrogen. From the data, a correlation between isotope ratio and the concentration of deuterium in water is established. The sample of water having an unknown concentration of deuterium is then equilibrated under the same conditions with the same reagent. The equilibrated reagent is analyzed to determine mass isotope ratio which is converted to deuterium concentration in water using previously established correlation. Deuterium concentration in water is then used for obtaining geothermal data.

Determination of deuterium concentration in water

AN OLEFI DISPROPORTIONATION CATALYST IS PROVIDED COMPRISING A MONOR AMOUNT OF TUNGSTEN OXIDE OR MOLYBEDENUM OXIDE, ABOUT 0.01 TO 1 WEIGHT PERCENT OF FLUORINE, THE REMAINDER OF THE CATALYST SUBSTANTIALLY BEING SILICA. THE PROCESS OF USING THIS CATALYST TO DISPROPORTIONATE UNSATURATD MATERIALS IS ALSO CLAIMED.

Olefin disproportionation catalyst and process for using same

Methane and/or carbon are produced when carbon monoxide and hydrogen are passed through a molten salt bath containing suspended therein a finely divided material capable of catalyzing the conversion of carbon monoxide and hydrogen to carbon and/or methane containing gases.

Robert B. Regier

Papers

Determination of deuterium concentration in water

Olefin disproportionation catalyst and process for using same

Method of producing methane and carbon

Method of measuring temperature

Paraffinic hydrocarbon dehydrogenation process