Abstract: An oil in water emulsion is prepared as a continuous process by causing a stream of water to flow through a duct containing a Venturi providing a converging frustum of a cone zone, a diverging frustum of a cone zone and a central zone joining the two frustum of a cone zones, so that the stream flows through a zone upstream of the Venturi where it is directed along a helicoidal path through the converging frustum of a cone zone to the central zone, drawing oil for emulsification to the duct at the zone upstream of the Venturi and causing it to flow along a helicoidal path in the same direction as the water to the central zone so that the oil and water mix and emulsify in that central zone, causing the emulsion so formed to flow through the diverging frustum of a cone zone, then causing the emulsion to flow along a helicoidal path of reverse slope, and thereafter discharging the emulsion from the duct.

Abstract: This invention relates to esters prepared by reactingA. a mixture of tri-, tetra- and hexafunctional polyols in which the molar ratio of the trifunctional polyol to the other polyols is from about 0.5:1 to 10:1 and in which the molar ratio of the hexafunctional polyol to the tetrafunctional polyol is from about 0 to 1.2:1, andB. a mixtue of linear alkyl monocarboxylic acids comprised of (i) one or more acids having from 7 to 8 carbon atoms and (ii) one or more acids having from 12 to 18 carbon atoms, the molar ratio of the acids (i) to the acids (ii) being from about 1.5:1 to 6:1.The invention also relates to lubricating compositions comprised of the esters.

Abstract: Anhydrous gold trichloride is prepared by stirring a suspension of finely divided tetrachloro-auric acid, having the thionyl chloride at a temperature in the range from 20.degree. to 65.degree. C in the absence of light, whereby said tetrachloro-auric acid and thionyl chloride react to form the desired end product.

Abstract: A poly-N-alkyliminoalane containing repeated imine units of the type ##STR1## wherein R is an aliphatic radical, is prepared by reacting an alane of an alkali or alkali-earth metal with a primary amine in the presence of a hydrocarbon solvent.

Abstract: A method is disclosed for preparing salts of monoesters of the carbonic acid, the improvement consisting in that the alcohol corresponding to the monoester is reacted with carbon dioxide and a halide of a metal of the Groups IA, IIA, IIIA and IIB of the Periodic Table, the reaction being effected in the presence of a nitrogenous, aliphatic, aromatic or heterocyclic base.

Abstract: An articulated stand apparatus for laying or recovering pipeline in or from a trench dug in the ground wherein the apparatus is hinged to the side of a tracked means or side boom and includes lifting tackle with a hook.The apparatus includes two rigid frames. One frame is hinged at its lower end to the tracked means in such a way that it can be rotated in a plane transverse to the tracked means. The second frame has extensible telescopic elements at its lower end for resting on the ground. The upper ends of the frames are hinged to each other and are disposed in a reversed V with the lifting tackle and hook supported at the vertex of the frames.Extending from the upper end of the second frame is a pair of arms whose ends are hinged to pistons of hydraulic cylinders, which, in turn, are hinged to the center line of the first frame.

Abstract: The present invention is directed to a process for the separation of butadiene from a stream-cracked C.sub.4 hydrocarbon stream by a sequential etherification of isobutylene and the acetylenic compounds that is followed by a distillation step.

Abstract: A method is disclosed for the preparation of thiocarbamic acid esters by reacting an aminic compound with carbon monoxide and an organic disulphide. Elemental selenium is used as the catalyst, possibly supplemented by a tertiary amine. The temperature and pressure ranges are comparatively wide.

Abstract: The invention relates to the preparation of oligomers starting from linear alpha-olefins and to the subsequent hydrogenation thereof to saturated oligomers products, and more particularly to the catalyst system used in the oligomer preparation reaction, the catalyst system consisting of a first component selected amongst the halogenated organo-metal aluminium components, and a second component capable of reacting with the first one and chosen amongst halogens or interhalogenic compounds and metal halides; thus higher yields of oligomers, as well as an easier performance and a control of the reaction are achieved. In turn the hydrogenation step is carried out in the presence of a known hydrogenation catalyst, at a temperature of 150 to 300.degree. C and under a pressure of from 20 to 150 atmospheres.

Abstract: A composition comprising a poly-alkyleneglycol is stablized against molecular degradation and viscosity loss at elevated temperatures by about 0.1 to about 10% by weight of an arylhydroquinone such as p-acetylphenylhydroquinone.

Abstract: This invention relates to an improved method for rapidly laying a pipeline in deep water by an anchored floating means. The rapid laying is obtained by varying the forces exerted by winches mounted on the floating means in such a manner as to impart a rapid movement to the floating means, in the longitudinal direction of laying, for a distance equal to the length of the piece of pipe added to the free end of the pipeline to be laid. Before termination of the rapid movement there is applied to the floating means a compensating force, whose direction, sense and intensity are such that, together with the forces exerted by the winches, said compensating force opposes moment by moment the central elastic force which induces a damped oscillatory motion in the floating means. This oscillation is thus eliminated or drastically and rapidly dampened.

Abstract: The mechanical and thermal properties of aluminum oxide, such as .gamma. alumina, adapted for use as a catalyst or catalyst carrier are improved through a treatment thereof with a silicon compound containing hydrolyzable radicals, such as methyl orthosilicate, in which the aluminum compound is impregnated with the silicon compound or a solution thereof in a compatible organic solvent whose boiling point is lower than the boiling point of the silicon compound. The impregnated aluminum oxide is slowly brought to the boiling temperature of the silicon compound in an inert atmosphere so as to cause silicon compound to react with the aluminum oxide and to distill off reaction products and excess silicon compound. The hydrolyzable groups bound to the silicon compound on the aluminum oxide are then reacted with water and distilled off.

Abstract: The mechanical and thermal properties of aluminum oxide, such as .gamma. alumina, adapted for use as a catalyst or catalyst carrier are improved through a treatment thereof with a silicon compound such as an alkyl orthosilicate in which the aluminum oxide is impregnated with the silicon compound or a solution thereof in a compatible organic solvent whose boiling point is lower than the boiling point of the silicon compound. The impregnated aluminum oxide is dried at a temperature in the range from above the boiling point of the silicon compound to 500.degree. C and is then subjected to controlled oxidation.

Abstract: Urea is produced through an integrated, isobaric process in which raw ammonia synthesis gas, consisting essentially of H.sub.2, N.sub.2 and sufficient CO.sub.2 to produce the urea and compressed to a pressure slightly above the urea synthesis pressure, is decarbonated in a vertical film heat exchanger where it is contacted with a thin aqueous film containing NH.sub.3 with which the CO.sub.2 reacts to produce a concentrated carbamate solution that is withdrawn from the bottom of the exchanger and fed to a urea reactor. The compressed, unreacted synthesis gas containing traces of CO and saturated with NH.sub.3 is withdrawn from the upper part of the heat exchanger, NH.sub.3 is separated therefrom and recycled to the heat exchanger, and the balance of the unreacted synthesis gas is subjected to methanation to eliminate any CO and CO.sub.2 therein.

Abstract: Improved integrated process for simultaneous synthesis of ammonia and urea. Improved yields of urea in purified form are obtained by a simple process which curtails the addition of external water to the process. Two carbon dioxide absorbers are employed. A concentrated ammonium carbonate solution is utilized in the primary carbon dioxide absorber. A secondary carbon dioxide absorber is downstream in series to the first or primary carbon dioxide absorber. An ammonical solution of ammonium carbonate is utilized in the secondary carbon dioxide absorber.

Abstract: A multi-stage process for the solvent extraction of butadiene from a mixed feed stock containing butadiene, C-4 saturated and olefinic hydrocarbons and acetylenic compounds is disclosed wherein the feed stock is contacted with N-formyl morpholine and C-4 saturated and olefinic hydrocarbons are separated therefrom in a first stage and, in a second stage, the solvent and acetylenic compounds present in the feed stock are respectively separated from one another.

Abstract: A device is provided for incorporation in apparatus for the automatic manufacture of articles from fabric by cutting the fabric into sets of single pieces and then moving the individual pieces of a set to a work station at which the pieces are sewed to each other, which comprises: a movable hollow frame, a flat plate which has a centrally disposed opening and which is adapted to be forced downwardly against the upper surface of a piece of fabric; a connection between the plate and the frame; an elongated oscillatory needle holder supported at its lower end by the frame along an axis of rotation located above the opening in the plate; a needle having a curved sharply tapered lower end and a stem; a connection between the stem and the needle holder at a point above the lower end of the needle holder whereby oscillation of the needle holder will cause the sharply tapered end of the needle to swing through the opening in the plate along an arc; and means are provided for adjusting the location of the arc so that

Abstract: Nicotinamide 6-(2-hydroxy-3-carboxy-propylamino) purine dinucleotide is prepared by reacting nicotinamide-adenine-dinucleotide with 3,4 epoxybutanoic acid in the presence of perchloric acid to prepare an intermediate wherein the adenine nucleus is alkylated in the N.sub.1 position. That intermediate is subjected to chemical reduction of the nicotinamide ring, followed by rearrangement to yield the end product wherein the amino group in position 6 of the adenine ring is alkylated.

Abstract: A chelated compound of uranium (IV) or thorium is prepared by reacting an anhydrous halide of uranium (IV) or thorium with a chelating agent such as acetylacetone in the presence of an anhydrous solvent and gaseous ammonia in the temperature range of 10 to 60.degree. C.

Abstract: A method is disclosed for preparing tertiary olefins starting from the corresponding tertiary ethers, the improvement consisting in contacting the ether with a catalyst composed by active alumina modified by reaction with a silicon compound selected among those corresponding to the general formula: ##STR1## wherein X,Y,Z and W can be --R, --OR, --Cl, --Br, --SiH.sub.3 , --COOR, --Sih.sub.n O.sub.m, R being hydrogen, an alkyl, cycloalkyl, aryl, aralkyl or alkyl-cycloalkyl radical of from 1 to 30 carbon atoms, n and m being integers comprised between 1 and 3. The advantages afforded by the invention are mainly the nearly quantitative yields and the high purity of the end products.