Abstract: An improved catalyst, having a reduced fouling rate when used in a catalytic reforming process, said catalyst comprising platinum disposed on an alumina support wherein the alumina support is obtained by removing water from aluminum hydroxide produced as a by-product from a Ziegler higher alcohol synthesis reaction, and wherein the alumina is calcined at a temperature of 1100.degree.-1400.degree. F. so as to have a surface area of 165 to 215 square meters per gram.
Abstract: A method for killing corn root worms by applying to the soil habitat of the root worms an insecticidal amount of the compound of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are alkyl of 1 to 4 carbon atoms; and X, Y, Z and V are sulfur or oxygen.
Abstract: A method is provided for stabilizing a polymerizable premix composition for use in preparing a polyurethane surface and the resulting composition. An aliphatic polyamide is used to achieve the stabilization.
Abstract: 3-Oxacaprolactam is prepared by a process which comprises: contacting an organic acid anhydride solution of a cyanoalkoxyalkanoate with hydrogen in the presence of a noble metal hydrogenation catalyst to prepare an amide-ester; and heating the amide-ester in excess water at a temperature above about 200.degree. C.
Abstract: Deposit control additives for internal combustion engines are provided which maintain cleanliness of intake systems without contributing to combustion chamber deposits. The additives are poly(oxyalkylene) carbamates comprising a hydrocarbyloxy-terminated poly(oxyalkylene) chain of 2-5 carbon oxyalkylene units bonded through an oxycarbonyl group to a nitrogen atom of ethylenediamine.
Abstract: Control method and apparatus for optimizing the operation of a natural draft combustion zone through which a conduit containing a process fluid to be heated passes, by decreasing the supply of combustion air until one or more of the following predetermined limiting conditions is reached: maximum CO in the flue gas, minimum O.sub.2 in flue gas, minimum draft in the combustion zone, maximum temperature of the outer surface of said conduit, and increase in the rate of fuel addition above a minimum amount. When a limiting condition is reached, the supply of combustion air is increased until the limiting condition is no longer present, and the cycle then repeated.
Abstract: Fuel compositions are provided which contain a deposit control additive. The deposit control additive is produced by reacting a hydrocarbylpoly(oxyalkylene) alcohol with excess phosgene and an excess amount of certain polyamines. The product comprises hydrocarbylpoly(oxyalkylene) ureylene carbamates.
Abstract: Improved adhesion of the semi-conducting layer to the conducting layer in a thin film photovoltaic cell is obtained by incorporating a minor amount of the element or elements of the conducting layer in the semi-conducting layer.
Abstract: A vapor-recovery system in which a coaxial vapor-recovery fuel dispensing nozzle cooperates with portions of the vehicle fuel receiving and storage system to prevent the escape of vapors into the atmosphere during refueling. The fuel-dispensing nozzle comprises a rigid, tubular vapor-recovery member coaxially arranged around the nozzle discharge spout to define a vapor-recovery passageway therebetween. A seal means is located inwardly of the fuel tank fillpipe opening to sealingly engage the vapor-recovery member when the nozzle discharge spout is operatively inserted into the fillpipe so that substantially all refueling emissions will flow into the vapor-recovery passageway of the vapor-recovery member.
Abstract: Lubricant compositions for internal combustion engines are provided containing dispersant additives which prevent sludge and varnish formation in the crankcase. The additives are oil-soluble poly(oxyalkylene) aminocarbamates comprising a hydrocarbyl-terminated poly(oxyalkylene) chain of 2-5 carbon oxyalkylene units.
Abstract: In accordance with the present invention, a marine streamer test system and method (MARSTEST) is disclosed for testing field-worthiness of hydrophone sections within the streamer under both passive and dynamic operating conditions. With regard to a passive operating state, five (5) test parameters are automatically generated and compared with upper and lower limits stored within a mini-computer housed aboard the marine exploration boat. Any out-of-specification values trip an alarm network and a printer to warn of the malfunctioning streamer section. Result: replacement or other repair can be effected. With regard to dynamic operating conditions, acceptable "signature" characteristics of the streamer (such characteristics can be 2 or more of the above 5 parameters) are stored within the computer aboard the exploration boat and are compared with actually generated field parameter values acquired during operations, say between "shots", i.e.
Abstract: A composition comprising at least 50 weight percent sulfur, a sulfur plasticizer, and an aromatic polysulfide which is formed by reacting one mol of an aromatic carbocyclic or a heterocyclic compound, substituted by at least one functional group of the class --OH or --NHR in which R is H or lower alkyl, with at least two mols of sulfur. Preferred sulfur plasticizers are aliphatic linear polysulfides, and preferred aromatic polysulfides are formed using phenol. The composition typically also contains an inorganic filler such as mica or asbestos.The composition is especially useful for obtaining surface coatings which are resistant to delamination, cracking and crazing upon exposure to weather conditions.
Abstract: A process for producing maleic anhydride from n-butane which comprises:(a) feeding n-butane and air to a reactor;(b) contacting the butane and air with a catalyst comprising vanadium and phosphorus oxides at reaction conditions including a temperature between 550.degree. F. and 1000.degree. F. so as to convert 15 to 28% of the butane per pass and obtain a reactor effluent containing maleic anhydride, unreacted butane, nitrogen, and oxygen;(c) removing maleic anhydride from the reactor effluent to obtain maleic anhydride-lean effluent;(d) recycling a portion of the maleic anhydride-lean effluent to the reactor;(e) removing butane from the other portion of the maleic anhydride-lean effluent; and(f) recycling the removed butane to the reactor.Preferably the temperature in, and/or space velocity through, the reactor is adjusted to obtain a weight percent selectivity to maleic anhydride of at least 90% of the butane converted.
Type:
Grant
Filed:
May 31, 1979
Date of Patent:
November 4, 1980
Assignee:
Chevron Research Company
Inventors:
Stephen G. Paradis, David M. Marquis, Kiran R. Bakshi
Abstract: Compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently alkyl groups containing 1 to 6 carbon atoms; R.sup.3 is a haloalkyl group of the formula C.sub.m Y.sub.(m-1) X.sub.(m+2) wherein X is fluoro, chloro, bromo or iodo and m=1 or 2; Y is hydrogen, fluoro, chloro, bromo or iodo; R.sup.4 is hydrogen, an alkyl group containing 1 to 6 carbon atoms, alkoxy containing 1 to 6 carbon atoms, alkenyl containing 2 to 6 carbon atoms, nitro, hydroxy, alkoxyalkyl containing 2 to 6 carbon atoms, fluoro, bromo, chloro or iodo and n-1, 2, 3 or 4, have fungicidal activity.
Abstract: A combination of a retorting process with a granular filtration zone whereby finely divided solids are removed from hydrocarbonaceous vapors. Raw hydrocarbon-containing particles such as shale are retorted by contacting them with heat carrier particles, and the resulting hydrocarbonaceous vapors withdrawn from the retort are contaminated with entrained, finely divided solids. These solids are removed from the hydrocarbonaceous vapors by passing the contaminated vapors at substantially the retorting temperature transversely through a downwardly moving bed of solid contact material maintained at approximately retorting temperature. The solid contact material is selected from retorted solids, heat carrier particles and mixtures of them. The mixture of finely divided solids and contact material withdrawn from the granular filtration may be returned to the process.
Abstract: Fungi, mites and mite eggs are killed by applying thereto sulfonamides of the formula ##STR1## wherein R and R.sup.1 individually are alkyl, cycloalkyl, aryl, carbamylalkyl, or alkoxycarbonylalkyl and R.sup.2 is haloalkyl, with the proviso that one R or R.sup.1 group is carbamylalkyl or alkoxycarbonylalkyl.
Abstract: Disclosed is a novel composition formed from the reaction of (a) an alkylphenol; (b) sulfur; (c) an alkaline earth metal and (d) an olefin. The composition is useful as a lubricating oil additive and provides both oxidation and corrosion control.
Abstract: A process for preparing glycolic acid which comprises contacting formaldehyde with formic acid in the presence of hydrogen fluoride present in an amount to serve as both catalyst and solvent for the reactants and reaction mixture.
Abstract: A new class of compositions, tetrahydropyrimidyl-substituted compounds, useful as ashless bases and rust inhibitors, is prepared by reacting a C.sub.3 -to C.sub.5a amine containing a 1,3-diaminopropane group with ethylenediamine tetraacetic acid or nitrilotriacetic acid at a temperature of 150.degree. to 250.degree. C. for 10 to 100 hours.
Abstract: An improved method and apparatus for bounce crimp texturizing thermoplastic yarn. The process and apparatus are characterized by a uniqe control system wherein either yarn thickness or a minute accumulation of the yarn discharged from the texturizer is sensed and the tension on the yarn controlled in response thereto so as to permit the yarn to issue from the texturizer in a loosely compacted tensionless state without significant intermediate yarn accumulation or piling prior to being continuously wound into packages.By eliminating substantial intermediate accumulation or piling of the yarn, the process and apparatus substantially reduce tangles, thereby reducing breakage and random crimpless lengths produced by the pulling on the yarn caused by these tangles.