Abstract: In a pressure let-down valve comprising a fixed choke and a variable choke means, a silver solder joint between the wear-resistant insert and the retaining ring is replaced by a mechanical joint. The mechanical joint is comprised of a split-locking ring, preferably consisting of two separate segments, fitting into an annular outwardly opening channel in the wear-resistant insert. The split-locking ring is fastened to the retaining ring to lock the wear resistant insert into place.

Abstract: A fuel composition comprising a liquid hydrocarbon fuel and a detergent amount of the product of reaction between a polyamine and a stearic acid is described.

Abstract: A hydrocarbon feedstock is desulfurized in a conventional hydrodesulfurization process unit (HDS), and then conducted into a catalytic dewaxing process unit (DDW). The cascading relationship of the HDS/DDW units enables the operator of the plant to recover a substantial portion of thermal energy from a number of process streams and decreases the size of the compressor required in the plant.

Abstract: The invention provides (1) products of reaction formed by reacting a hydrolyzed imidazoline, a mercaptan and an aldehyde and (2) products of reaction of (1) and a boron compound, as well as lubricant compositions containing same.

Abstract: A method for conditioning a coal seam prior to in-situ gasification to increase the permeability of the coal seam to the flow of combustion-supporting gas therethrough and thus increase the efficiency of gasification wherein a wettability alteration fluid is injected into the coal seam via an injection well and fluids including the wettability alteration fluid are recovered from a spaced apart production well. Injection of the wettability alteration fluid is continued into the coal seam until the permeability thereof to the flow of the combustion-supporting gas therethrough has increased to a maximum extent. Suitable wettability alteration fluids include carbon dioxide, volatile amines, aqueous solutions containing phosphates, phenols, flue gas and alcohols, and mixtures thereof.

Abstract: Polymerizable (that is, e.g., monomeric) polyfluorinated compounds, when added to a lubricant or to a liquid hydrocarbon fuel, as for example gasoline, will cause a reduction in fuel consumption. Reduced fuel consumption may also be realized for long periods from pistons and/or cylinder walls so coated with one or more of the polymerizable compounds.

Abstract: Conversion of carbon monoxide, hydrogen, and alcohol containing mixtures in the presence of a new class of heterogeneous catalyst is provided. Said new class of heterogeneous catalyst comprises a substrate having a minimum surface area of about 10 m.sup.2 /g and having pores with a minimum pore diameter of about 5 Angstrom Units, said substrate being modified by at least one amine functional member coordinated to a metal function, said amine functional member acting as a bridging member between said substrate and said metal function.

Abstract: A process is disclosed whereby benzene is brought into contact with propylene, in the presence of a specified type of crystalline zeolite catalyst, to produce isopropylbenzene. The preferred zeolite catalysts are those having a silica to alumina ratio of at least about 12 and a constraint index, as herein defined, within the approximate range of 1-12. The process may be carried out in the liquid or the vapor phase at temperatures of from about 100.degree. C. to about 300.degree. C. and pressures ranging from 10.sup.5 N/m.sup.2 to 6.times.10.sup.6 N/m.sup.2.

Abstract: This invention provides a linear thermosettable polyester based upon 10-20 weight percent cyclohexanedimethanol, 10-16 weight percent adipic acid, 12-16 weight percent neopentyl glycol, 12-16 weight percent propylene glycol or butanediol, and 40-48 weight percent isophthalic acid component.

Abstract: The elution of zinc from zinc-impregnated zeolite catalysts is minimized by incorporating gallium into the catalyst composition. Optionally, palladium may also be included in the composition. The catalyst composition is used to effect the conversion of propane in hydrocarbon streams to aromatic hydrocarbons.

Abstract: An integrated method for refining a hydrocarbon distillate fraction such as kerosene which has sulfur-containing compounds by washing the fraction with an alkaline solution and then sweetening the resulting distillate by treating it with a phthalocyanine catalyst in the presence of a second alkaline solution and oxygen while simultaneously disposing of the spent caustic from the washing by incinerating same in the presence of a sulfur-containing fuel and oxygen to yield harmless sulfates.

Abstract: A method for recovering heavy oil from a subterranean, permeable, heavy oil-containing formation comprising injecting steam into the lower portion of the formation, injecting a controlled amount of unheated water into the upper portion of the formation and displacing the oil through the formation toward a production well where the oil is produced. The steam injection releases heat (BTU) to the heavy oil and formation reducing the viscosity of the oil and increasing its mobility for recovery. The sequence of injection of the water and steam is designed to yield the maximum oil recovery per BTU injected by increasing the volume of the formation subjected to heating and increasing the vertical sweep.

Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g., to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, and a minor amount, e.g., at least at 0.25 weight percent of one or more of the alkali metals (e.g., Li, Na, K, Cs) and optionally phosphorus, said alkali metals and phosphorus being present in the catalyst at least in part in the form of their oxides.

Abstract: A method for removing the effects of said subsurface anomalies in magnetotelluric survey data is disclosed wherein resistivity curves are compared and a correction factor is determined. Resistivity curves having a deviation from a mean are multiplied by this correction factor.

Abstract: Phenol is catalytically alkylated with an isopropanol or propylene alkylating agent to form high yields of an isopropylphenol product enriched in the para-isomer of isopropylphenol. Such an alkylation process is carried out under catalytic alkylation conditions including a temperature of from about 200.degree. C. to 300.degree. C. and contact with a crystalline zeolite catalyst having a silica to alumina molar ratio of at least about 12 and a constraint index of about 1 to 12.

Abstract: A new and useful improvement in the method for preparing synthetic crystalline aluminosilicate zeolite ZSM-12 is provided. The improved method comprises synthesizing ZSM-12 in the presence of cyclic quaternary amine halides as templates rather than the conventional template of tetraethylammonium.

Abstract: A process is described for improving yield and leaching rates of mineral values in uranium-bearing formations associated with high brine aquifers by using high pressure CO.sub.2 /oxidant in the leaching solution. The high pressure CO.sub.2 overcomes the inhibiting effect of NaCl on the rate of leaching. Uranium is recovered at the well head by ion exchange at a pH of about 4.5 to about 5.0 either under pressure to keep the CO.sub.2 in solution or with provision for CO.sub.2 recovery and recycle.

Abstract: Acrylonitrile polymer film is treated with non-volatile water-miscible glycol plasticizer to improve toughness and other film properties. In a unique, continuous, steady state process polyacrylonitrile aquagel strip is treated with plasticizer additive in concentrated aqueous solution. Aquagel strip is passed at substantially constant rate through a solution treatment bath. The aquagel strip, which may contain at least about 40 weight % water uniformly dispersed in the polyacrylonitrile, is contacted with the aqueous solution during a predetermined residence time in the bath. After passing the treated aquagel strip from the bath, excess aqueous additive solution is removed. The plasticizer additive can be metered to the aqueous solution at concentration greater than the aqueous additive solution of the bath at a rate substantially proportionate to desired steady state uptake of additive for the aquagel strip.

Abstract: Laminar thermoplastic film constructions comprising a layer of low density polyethylene bonded to a layer of a dissimilar polymer blend comprising high density polyethylene and polyethylene copolymers. In particular such copolymers comprise polyethylene copolymerized with another alpha olefin containing from about 3 up to about 15 carbon atoms. Such copolymers are also characterized by being linear, low density polymers having densities which are below about 0.94 grams/cc.

Abstract: A process for producing liquid fuels and for recovering metal values from crude petroleum by vis-breaking the reduced crude petroleum and dealkylating the vis-broken, reduced crude by treatment with an aromatic compound and an acidic transalkylation catalyst. The liquid product from the dealkylation step is separated and the residue fraction thermally processed with coal to solubilize the coal in the aromatic residue and demetallate the residue with the coal. The coal is partly liquified in this step and the liquefaction products, together with liquids derived from the petroleum, may be hydrotreated prior to further processing e.g., in an FCC unit. The solid residue from this step may be treated to recover the metal values, especially nickel and vanadium.