Abstract:
The invention is directed to a method of fueling gas turbines from natural gas reserves with relatively low methane concentrations. The invention uses such reserves to generate electric power. The invention permits the use of these reserves at significantly lower cost than by producing pipeline natural gas to fuel gas turbines to generate electric power. These reserves currently generally are used only after the removal of impurities to produce pipeline natural gas quality turbine fuel. The latter current technology is capital intensive, and at current natural gas prices, economically unattractive. The process of the invention can remove the impurities from the gas from the natural gas reserve necessary for protection of the environment, and leaves inert gasses in the fuel in an amount which will increase the output of a gas turbine for the generation of power by about 5 to about 20 %.
Abstract:
This invention relates to the use of esters with low water solubility as oxygenates in gasoline fuels. This invention relates to a gasoline fuel, comprising an ester and butane, wherein the ester contains 5 to 14 carbon atoms. This invention also relates to using a low water solubility ester as an oxygenate in automotive gasoline used in internal combustion engines. Additionally, the invention provides a gasoline fuel, comprising an ester, wherein the ester has a water solubility of less than about 15,000 mg/L at 20 DEG C, preferably less than about 6,500 mg/L at 20 DEG C and the fuel has an overall water solubility of less than about 5,000 mg/L at 20 DEG C.
Abstract:
A process for rendering films, film composites, and articles made therefrom less resistant to passage of water vapor by passing a filled precursor film (10) or film composite through the nip of interdigitating grooved rollers (24, 25). The films (10) or film composites are generally formed using a precursor film (10) of a film forming polyolefin or polyolefin blend, with a relatively high filler loading and optionally an elastomer. A process is disclosed for making diapers or other disposable items where a relatively high water vapor is coupled with a resistance to liquid strikethrough. In one embodiment of the invention, the interdigitating grooved rollers (24, 25) are maintained in a temperature range of from about 91 DEG F to about 159 DEG F.
Abstract:
Motor vehicle parts based on an ethylene, alpha-olefin, diene monomer elastomeric polymers exhibit excellent low temperature compression set. Previously, such compression set performance in the amorphous region was believed to be non-responsive to ethylene content once the amorphous region was reached. However, within certain ranges, ethylene content has been shown to have an effect on low temperature compression set even in the amorphous region. These motor vehicle parts are particularly useful where extremes of ambient temperatures maybe incurred. In a preferred embodiment, the invention is a vehicle part, such a brake part or belt including an ethylene, alpha -olefin, diene elastomeric polymer. The elastomeric polymer has a low ethylene content, and the vehicle part made from a compound based on the elastomeric polymer will have improved low temperature compression set. The vehicle part comprises the elastomeric polymer where the polymer has ethylene present in the range of from 50-60 mole percent, ethyldiene norbornene present in the range of from 0.2-5 mole percent and an alpha -olefin, selected from propylene, hexene-1 and octene-1, where the alpha -olefin makes up the remainder of the elastomeric polymer. The ethylene composition distribution of the elastomeric polymer is such that the ethylene in 90 % of the polymer fractions varies by no more than +/- 4 % by weight. The Mw/Mn will be in the range of 2-4, the inherent viscosity in the range of 1.2-3.2 and the Mooney Viscosity (1+4) @ 125 DEG C in the range of from 10-80. The vehicle part will have an instantaneous compression set at -40 DEG C, less than 80 %.
Abstract:
Alkyl aromatic compounds are converted to alkyl aromatic aldehydes by a carbonylation reaction. The carbonylation catalyst can be a high boiling point carbonylation catalyst which allows for the separation of the aldehyde product by selective volatilization. Alternatively, the carbonylation catalyst can be selected from perfluoroalkyl sulfonic acids having 2 to 18 carbon atoms, perfluoroether sulfonic acids having 2 to 18 carbon atoms, BF3.(ROH)x wherein R represents CH3 or H and X is a number within the range of from 0.2 to 2, GaBr3, GaCl3, TaF5, NbF5, and NbBr5, with the proviso that when the catalyst is TaF5, NbF5, or NbBr5, then the reaction takes place in the absence of added HF. Preferably, all of the carbonylation reactions take place in the absence of added HF. The alkyl aromatic aldehydes can be oxidized to form an aromatic acid. A mixed xylene feed stock can be converted to a mixture of diemthylbenzaldehydes and then oxidized to form trimellitic acid without the need to separate the xylene or dimethylbenzaldehyde isomers.
Abstract:
This invention is a solution process for the preparation of ethylene- alpha -olefin-diolefin copolymers comprising contacting ethylene, one or more a-olefin monomer, and one or more cyclic diene monomer, with a catalyst composition comprising a bridged, bis(cyclopentadienyl) zirconium compound having an unsubstituted cyclopentadienyl ligand, a multiply substituted cyclopentadienyl ligand, said ligands bridged by a covalent bridging group containing one or more Group 14 element, and two uninegative, activation reactive ligands and a catalyst activator compound. The invention process exhibits high catalyst activity, high comonomer incorporation and high diene monomer conversion rates and is particularly suitable for the preparation of elastomeric ethylene-propylene or ethylene-propylene-diene monomer elastomers.
Abstract:
A process for the separation, and removal, of hydrogen, or both hydrogen and carbon monoxide, from a mixture of these gases with olefinic hydrocarbons. In one embodiment, a mixture constituted of hydrogen and one or more reactive unsaturated hydrocarbons is contacted with oxygen or an oxygen-containing gas, over a catalyst at reaction conditions sufficient to oxidize the hydrogen component of the mixture to form water, while suppressing reaction of the reactive unsaturated hydrocarbon. In a second embodiment, there is included a two-reaction-zone series wherein effluent from the first reaction zone, wherein the mixture includes hydrogen, carbon monoxide and at least one reactive unsaturated hydrocarbon, is contacted with oxygen or an oxygen-containing gas, and reacted over an oxidation catalyst at conditions sufficient to oxidize the carbon monoxide component of the mixture to form carbon dioxide and suppress hydrogenation of the reactive unsaturated hydrocarbons. In a third embodiment, there is included a three-reaction-zone series wherein effluent from the second reaction zone, wherein the mixture includes carbon monoxide, water, and at least one reactive unsaturated hydrocarbon, is reacted over a water-gas-shift and hydrogenation catalyst at conditions sufficient to react carbon monoxide component of the mixture to form carbon dioxide and hydrogen, and hydrogenate said reactive unsaturated hydrocarbon with the resulting hydrogen. In each embodiment, reactive unsaturated hydrocarbons denuded of hydrogen, or both hydrogen and carbon monoxide are recovered.
Abstract:
The present invention relates to methods for converting oxygenates to olefins. More particularly, the invention relates to methods for converting oxygenates to olefins with improved olefin yields and decreased yields of undesirable methane and other light saturate byproducts. It is characterised by the use of high weight hourly space velocity (WHSV; above 20 hr ).
Abstract:
The anti-shudder durability of power transmitting fluids, particularly automatic transmission fluids, is improved by incorporating a combination of low potency friction modifiers, alkyl phosphites, specific ashless dispersants and a corrosion inhibitor. The anti-shudder durability of these fluids may be further enhanced by inclusion of a metallic detergent.
Abstract:
There are disclosed fuel oil compositions having improved low temperature properties which contain an additive being an ester, amide or amine derivative of a polyalkylene glycol diacid or mixtures of this additive with conventional flow improver co-additives.