Abstract: Heavy liquid hydrocarbon oil, such as petroleum derived tars, predominantly boiling over 425.degree. C., are upgraded to products boiling below 425.degree. C., without substantial formation of insoluble char, by heating the heavy oil with hydrogen and a hydrogen transfer solvent in the absence of hydrogenation catalyst at temperatures of about 320.degree. C. to 500.degree. C., and a pressure of 20 to 180 bar for 3 to 30 minutes. The hydrogen transfer solvents are polycyclic compounds free of carbonyl groups, e.g., pyrene, and have a polarographic reduction potential which is less negative than phenanthrene and equal to or more negative than azapyrene.

Abstract: An apparatus is provided to ensure uniform distribution of molten thermoplastic resin around a tubular die annulus upon extrusion of a thermoplastic tube. The apparatus comprises a toroidal chamber surrounding the die into which the molten resin is fed from one side, and a plurality of ports through which the molten plastic flows out of that chamber toward the die annulus. The cross-sectional area of each of the ports is gradually increased from a point adjacent the entry of the molten resin to a maximum feed port cross-section at a point 180.degree. from the resin entry point. This arrangement ensures a more uniform molten resin distribution around the die annulus during extrusion.

Abstract: Process for the recovery of uranium from a pregnant lixiviant employed in uranium leaching operations in which the uranium is concentrated by ion exchange resin. The ion exchange resin is eluted with an eluant containing 0.05-0.5 molar ammonium carbonate. The eluant also contains a base such as ammonium hydroxide in an amount sufficient to increase the pH to a value within the range of 9.0-11.0, thus increasing the carbonate/bicarbonate ratio. This enables the use of a relatively small quantity of ammonium carbonate to provide the desired carbonate ion concentration during the elution step.

Abstract: Process for the stabilization of formation clays by the use of aluminum in the in-situ leaching of uranium or the restoration of contaminated formations. The aluminum is added to a lixiviant having a pH in the range of 6-10 or to a restoration fluid having a pH of at least 6 in an amount effective for the stabilization of clays.

Abstract: There are disclosed improved die structures for the extrusion of a tubular sheet of thermoplastic film material. The die comprises a housing having an opening therethrough, a mandrel located in the opening and spaced from the wall thereof to form an annular conduit, and a base plate positioned at one end of the opening and attached to the housing. The mandrel is spaced from the base plate by a plurality of spacers and releasably connected thereto by attaching means extending through some or all of the spacers. Recesses are optionally provided in the immediate vicinity of each spacer to increase the volume of molten material flowing past the spacer.

Abstract: A method for protecting the steel casing and production tubing in a carbon dioxide production well from the corrosive effects of the produced carbon dioxide. The cased well is filled with corrosion inhibitor liquid and fluid communication between the producing formation and the casing is established by perforating or the like. A pump means, e.q. electrically driven, centrifugal pump system and a packer means are lowered on the production tubing to a point adjacent or slightly above the producing formation. The packer means is set to isolate the pump means from the well annulus above the packer means. The corrosion inhibitor liquid below the packer is pumped to the surface through the production tubing and the well is now ready to produce carbon dioxide.

Abstract: Insecticidal compounds having the formula: ##STR1## wherein R is halogen (Cl, F, Br), C.sub.1 -C.sub.4 alkyl, NO.sub.2, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, cyano, CF.sub.3, CF.sub.3 O, CF.sub.3 S, ClF.sub.2, CHF.sub.2 O, or CHF.sub.2 S; n is 0, 1, or 2; R.sub.1 is C.sub.1 -C.sub.4 alkyl, C.sub.3 -C.sub.6 cycloalkyl, or C.sub.2 -C.sub.4 alkenyl; and R.sup.2 is hydrogen, cyano, formyl, C.sub.1 -C.sub.4 acyl, C.sub.1 -C.sub.4 carboalkoxy, carbamoyl, N-C.sub.1 -C.sub.4 alkylcarbamoyl, or N,N-di C.sub.1 -C.sub.4 alkylcarbamoyl.

Abstract: Method of preparing films of acrylonitrile polymer exhibiting very high tensile strength, stiffness, optical clarity, and outstanding gas barrier properties. Method entails extruding a hot, concentrated solution of said polymer in a solvent therefor that is water-soluble, e.g., dimethyl sulfoxide, onto a film-supporting surface, e.g., a flat surface, or a drum, which, preferably, has a low energy surface such as provided by wetting the surface with aqueous dimethyl sulfoxide, or coated with polytetrafluoroethylene, or other suitable means to thereby form a film. The resulting film is then contacted with an aqueous medium, e.g., water to remove the solvent (e.g., dimethyl sulfoxide) and partially replace it with water, this treatment being effected under conditions that will prevent the film from curling or puckering. The resulting film is composed essentially of acrylonitrile polymer and water, and is ignition resistant.

Abstract: Process for the in-situ leaching of uranium from a subterranean ore deposit employing a lixiviant containing a carbonate leaching agent and an oxidizing agent. The lixiviant is heated to a temperature of at least 110.degree. F. prior to injection into the subterranean ore deposit. The use of a heated lixiviant provides for a substantially greater ultimate uranium recovery than that attained through the use of a lixiviant injected at ambient temperature conditions. The process may be carried out in several stages. In the first stage, a relatively low temperature lixiviant is injected. This is followed by a second stage in which the lixiviant is heated to an elevated temperature and then injected into the deposit. The invention is particularly applicable for use in subterranean deposits which contain uranium associated with carbonaceous material.

Abstract: A rotary method and apparatus are described to mitigate differential sticking of a drill string during the drilling of a wellbore. Eccentrically bored tool joints are used for interconnecting joints of drill pipe together into a drill string for use in drilling the wellbore. The drill string is rotated in the wellbore, causing the drill pipe to be eccentrically moved in the wellbore during the drilling operation to better remove the cuttings from the wellbore and mitigate differential sticking of the drill string.

Abstract: Polymer oils having reduced viscosity and increased viscosity index are produced by oligomerizing a mixture of short chain 1-olefins and long chain 1-olefins in the presence of water or alcohol promoted boron trifluoride catalyst and low-boiling recycle from a previous oligomerization run.

Abstract: There are provided insecticidal ketones having the general structure: ##STR1## insecticidal compositions containing the ketones and a carrier, and the method of controlling insects with the ketones.

Abstract: A 30-60% solution of acrylonitrile in dimethyl sulfoxide is polymerized using a redox catalyst system of water soluble bisulfite salt and a water soluble persulfate salt.

Abstract: There is provided a method for depositing asphalt from an asphalt emulsion onto an aggregate, as in road construction. Prior to applying the asphalt emulsion, the aggregate is wetted down with water containing a minor amount of an anionic or a cationic coupling agent selected to have a charge opposite to that of the asphalt emulsion.

Abstract: New thiadiazole ureas are provided for the control of plant growth, especially of underisable weeds and grasses. Particularly effective are compounds which contain an organic substitutent in the 5-position of the thiadiazole portion.

Abstract: New thiadiazole ureas are provided for the control of plant growth, especially of undesirable weeds and grasses. Particularly effective are compounds which contain an organic substituent in the 5-position of the thiadiazole portion.

Abstract: Water based coatings have been developed comprising water containing dispersed liquid droplets of water immiscible, hydroxy functional organic material, which are emulsified in the water, the water having dispersed therein an amine salt constituted by a salt of a solubilizing acid with a polyamide having a plurality of terminal primary amine groups. About one of the primary amine groups in the polyamide is unsubstituted, and at least about 70% of the isocyanate-reactive amino hydrogen atoms in the polyamide other than in the unsubstituted primary amine group are reacted with one isocyanate group of an organic polyisocyanate, the remaining isocyanate groups of which are blocked by a volatile blocking agent. The blocked isocyanate groups are nonreactive at room temperature and the unblocked isocyanate groups are reactive with the hydroxy functionality of the organic hydroxy functional material at elevated temperature.

Abstract: High solids, low viscosity, radiation curable, aqueous coatings compositions are provided by adding a small proportion of water to a polyethylenically unsaturated resin, preferably a liquid polyester containing acrylate groups and carboxyl functionality enabling improved dispersibility with water in the presence of a base, and a water soluble monoethylenically unsaturated monomer selected from acrylamide and N-methylol acrylamide is added to lower the viscosity of the composition and also to improve the cure. An ultraviolet photosensitizer, such as benzophenone, is added, preferably together with a tertiary amine cosensitizer, to enable ultraviolet cure.