Patents Assigned to Snam Progetti S.p.A.
  • Patent number: 4212799
    Abstract: A method for preparing nontoxic, edible proteinic concentrates adapted also for human nutrition, is disclosed according to which undesirable compounds such as polyphenols (e.g. chlorogenic and caffeic acids) are complexed by aluminum salts to prevent oxidizing these polyphenols to quinones.It is important that aluminum be constantly kept in soluble form to prevent it from being precipitated together with the proteins when protein-precipitating acidification is carried out.Citric acid has been found to be the best complexing agent.
    Type: Grant
    Filed: May 22, 1979
    Date of Patent: July 15, 1980
    Assignee: Snam Progetti, S.p.A.
    Inventors: Carlo Nuzzolo, Rodolfo Vignola, Antonio Groggia
  • Patent number: 4137262
    Abstract: A process for producing urea from CO.sub.2 and NH.sub.3 in which the CO.sub.2 and NH.sub.3 are reacted in a reactor, the reaction product containing unreacted carbamate, CO.sub.2, NH.sub.3 and water is passed into a first decomposer maintained at the same pressure as the reactor, the reaction product is heated and thermally decomposed in said first decomposer to separate a major amount of carbamate from the reaction product, the remaining reaction product is passed into the upper end of a second decomposer maintained at the same pressure as the reactor and first decomposer and said remaining reaction product in said second decomposer is contacted with a stripping stream of inert gas, separating the unreacted compounds from the liquid effluent and a finished product comprising a water solution of substantially pure urea is removed from the lower end of the second decomposer.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: January 30, 1979
    Assignee: Snam Progetti S.p.A.
    Inventors: Mario Guadalupi, Umberto Zardi, Vincenzo Lagana
  • Patent number: 4113790
    Abstract: This invention relates to the preparation of linear alpha-olefin oligomers and more particularly to the catalyst system which consists of a two component mixture comprising an aluminium halide and a compound capable of reacting with said aluminium halide and selected among(a) halogens or interhalogenic compounds,(b) halogenated compounds having the formula ##STR1## in which R', R", R'", represent H or alkyl or aryl (C) METAL HALIDESBy the above catalyst system oligomers can be prepared with high yields and with an easier control and performance of the reaction, starting from linear alpha-olefins having 3 to 12 carbon atoms.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: September 12, 1978
    Assignee: Snam Progetti, S.p.A.
    Inventors: Sebastiano Cesca, Aldo Priola, Giuseppe Ferraris
  • Patent number: 4113694
    Abstract: A method is described whereby olefin terpolymers, consisting of ethylene, an alpha olefin and a polyene having in the molecule, in addition to the double bond participating in the formation of the macromolecule, at least one conjugated double bond system, are stabilized against oxidative aging without destroying their characteristic high vulcanization rate by reacting them with a dienophilic agent represented by one of the following formulae: ##STR1## wherein R and R.sub.6 may be an alkyl, alkenyl, cycloalkyl, aryl or aralkyl radical having up to 8 carbon atoms, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may be hydrogen or akyl, aryl, cycloalkyl or aralkyl radicals having up to 8 carbon atoms, the R.sub.1 -R.sub.2 and R -R pairs may be divalent radicals forming condensed rings.
    Type: Grant
    Filed: March 9, 1977
    Date of Patent: September 12, 1978
    Assignee: Snam Progetti, S.p.A.
    Inventors: Sergio Arrighetti, Sebastiano Cesca, Giuseppe Ghetti, Eugenio Vajna
  • Patent number: 4105588
    Abstract: Process for the purification of olefins by removing oxygen and acetylene from them which comprises passing the olefins over a contact material consisting essentially of a metallic element from the first B group of the period system which element is homogeneously and finely dispersed on a carrier selected from zeolites, spheroidal alumina, silica gel, Kieselghur or colloidal silica stabilized in an aqueous suspension. The purification process is carried out at temperatures of from -50 to 50.degree. C. under pressures of from 0.01 to 60 atmospheres. The contact material is prepared by mixing a suitable compound of the metallic element such as a carbonate or ammonia complex with the selected carrier, thereafter atomizing the mixture to obtain microspheroids, granulating the spheroids into the desired shape and size and finally subjecting the carrier material to a reducing treatment to obtain the metallic element thereon.
    Type: Grant
    Filed: June 7, 1977
    Date of Patent: August 8, 1978
    Assignee: Snam Progetti, S.p.A.
    Inventors: Agostino Balducci, Margherita Corbellini, Vittorio Mormino, Bruno Notari, Luigi Rivola
  • Patent number: 4100208
    Abstract: Process for production of ethylenic compounds by hydrogenating the corresponding alkynol with isopropyl alcohol in the presence of a metal complex such as IrH.sub.3 CO(P.phi..sub.3).sub.2 and IrH.sub.3 (P.phi..sub.3).sub.2.
    Type: Grant
    Filed: April 11, 1974
    Date of Patent: July 11, 1978
    Assignee: Snam Progetti S.p.A.
    Inventors: Federico Maspero, Emilio Perrotti
  • Patent number: 4100334
    Abstract: Polymers of the type commonly used in packaging are rendered degradable through the action of sunlight by adding thereto up to 3% of an olefinically unsaturated compound containing at least two double bonds, such as 1,6-diphenylhexatriene.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: July 11, 1978
    Assignee: Snam Progetti S.p.A.
    Inventors: Nicola Palladino, Marcello Mazzei, Walter Marconi
  • Patent number: 4100029
    Abstract: A method is disclosed for improving the activity of oxireductase enzymes, the improvement consisting in that an enzyme and a previously functionalized coenzyme are embedded in a filamentary structure, the coenzyme having previously been attached to a water-soluble, high-molecular-weight polymer.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: July 11, 1978
    Assignee: Snam Progetti S.p.A.
    Inventors: Giulio Prosperi, Walter Marconi, Silvia Giovenco, Franco Morisi
  • Patent number: 4096172
    Abstract: A process for preparing acrylonitrile comprising feeding propylene, ammonia and oxygen at ratios between 1/0.7/1 and 1/1.4/3 and at temperatures between 350.degree. C. and 550.degree. C., at pressures between 1 atm. and 5 atm. over a catalyst consisting essentially of one having the general formula:W.sub.a M.sub.b Me.sub.c viii O.sub.dwherein W is tungsten; M is bismuth; Me viii is iron; and O is oxygen, and wherein the tungsten is present in gram atomic amounts greater than the gram atomic amounts of each individual remaining metal component or the sum of the remaining components and a is 1; b is 0.04 to 0.8; c is 0.08 to 0.8; and d is 2.5 to 9.5, said catalyst having been calcined at a temperature in the range of from 400.degree. C. to 800.degree. C. for from 1 to 60 hours.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: June 20, 1978
    Assignee: Snam Progetti, S.p.A.
    Inventors: Bruno Notari, Vittorio Fattore
  • Patent number: 4064153
    Abstract: An oligomer N-alkyl-iminoalane, made up of a plurality of four and/or six member rings of the formulae: ##STR1## wherein R is an aliphatic, cycloaliphatic or aromatic hydrocarbon combined in a tridimensional cage structure having the chemical composition (HAl-NR).sub.n, in which R has the above meaning and n is a whole number lower than or equal to 10, is prepared by reacting a primary amine containing a secondary or tertiary carbon atom in alpha or beta position with respect to the amine nitrogen atom or amide derivative thereof wherein the amine radical contains a secondary or tertiary carbon atom in alpha or beta position with respect to the nitrogen atom with a complex formed by AlH.sub.3 and a Lewis base, or by reacting said primary amine with an alkali or alkaline-earth metal alanate.
    Type: Grant
    Filed: July 1, 1975
    Date of Patent: December 20, 1977
    Assignee: Snam Progetti S.p.A.
    Inventors: Salvatore Cucinella, Marco Cesari, Tito Salvatori
  • Patent number: 4064146
    Abstract: An alpha-substituted epoxide, represented by the formula: ##STR1## wherein R, R' and R"' are alkyl having up to 12 C atoms and R" is hydrogen, is prepared by oxidizing, with molecular oxygen, the corresponding alcohol, represented by the formula: ##STR2## wherein R, R', R" and R"' have the meaning given above, in the presence of a catalyst consisting of a monovalent copper complex.
    Type: Grant
    Filed: September 25, 1975
    Date of Patent: December 20, 1977
    Assignee: Snam Progetti S.p.A.
    Inventors: Carlo Neri, Emilio Perrotti
  • Patent number: 4061675
    Abstract: Urea is produced from ammonia synthesis effluent containing hydrogen, nitrogen, methane and argon, which is reacted with carbon dioxide to form ammonium carbamate. The hot ammonia synthesis effluent is contacted with the liquid effluents from the area synthesis reactor to dissociate the carbamate contained in said effluents into a gaseous effluent containing ammonia, carbon dioxide and oxygen, and to produce a further liquid reaction product containing urea. Oxygen is removed from the carbamate dissociation effluent, which is then fed to the ammonia synthesis step.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: December 6, 1977
    Assignee: Snam Progetti S.p.A.
    Inventor: Renzo Gagliardi
  • Patent number: 4055535
    Abstract: A method is described whereby olefin terpolymers, consisting of ethylene, an alpha olefin and a polyene having in the molecule, in addition to the double bond participating in the formation of the macromolecule, at least one conjugated double bond system, are stabilized against oxidative aging without destroying their characteristic high vulcanization rate by reacting them with a dienophilic agent represented by one of the following formulae: ##STR1## wherein R and R.sub.6 may be an alkyl, alkenyl, cycloalkyl, aryl or aralkyl radical having up to 8 carbon atoms, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may be hydrogen or alkyl, aryl, cycloalkyl or aralkyl radicals having up to 8 carbon atoms, the R.sub.1 -R.sub.2 and R -R pairs may be divalent radicals forming condensed rings.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: October 25, 1977
    Assignee: Snam Progetti S.p.A.
    Inventors: Sergio Arrighetti, Sebastiano Cesca, Giuseppe Ghetti, Eugenio Vajna
  • Patent number: 4053521
    Abstract: A prochiral or racemic substrate such as a prochiral ketone is converted into an optically active product through a process wherein said substrate is subjected to an asymmetric hydrogen transfer reaction by means of an optically active amino-alane or polyimino-alane represented by the formulaH.sub.2 AlNR.sub.1 R.sub.2, H Al(NR.sub.1 R.sub.2).sub.2 or (H AlNR).sub.nwherein R, R.sub.1 and R.sub.2 are alkyl, aryl or cycloalkyl radicals, n is an integer higher than 4, and which contains an Al -- N direct bond and an Al -- H bond per aluminum atom, and the third substituent bound to aluminum is halogen, --H, ##STR1## or --OR wherein R has the aforesaid meaning, and wherein the asymmetry center is constituted by a primary or secondary amine group containing an optically active alkyl radical.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: October 11, 1977
    Assignee: Snam Progetti S.p.A.
    Inventors: Matteo Giongo, Walter Marconi, Nicola Palladino, Francesco Di Gregorio
  • Patent number: 4047702
    Abstract: The invention relates to a device for absorbing impact energy and more particularly to a device to be mounted to a conventional guard rail structure. The device consists of a skein of yarn of undrawn synthetic polymer and preferably nylon 6. The yarn is passed through the holes of a plate which, in turn, is mounted in a gap of a conventional guard rail structure. The weight of the skein is related to the amount of impact energy to be absorbed.
    Type: Grant
    Filed: February 12, 1976
    Date of Patent: September 13, 1977
    Assignee: Snam Progetti S.P.A.
    Inventors: Enrico Cernia, Walter Conti
  • Patent number: 4046810
    Abstract: Diphenylamine, or the alkyl, phenyl, amino, alkoxy, hydroxy or halogen derivative thereof, is prepared through a continuous process wherein a stream of the corresponding imine (e.g. N-cyclohexylidene aniline) in the vapor phase and oxygen are fed to a reactor maintained at a temperature in the range from 300.degree. to 450.degree. C, at a rate providing a contact time between the reactants in the range of 0.1 to 20 seconds.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: September 6, 1977
    Assignee: SNAM Progetti S.p.A.
    Inventors: Pietro Antonio Moggi, Ugo Romano
  • Patent number: 4042595
    Abstract: A ketonic heterocyclic compound having at least two heteroatoms in the ring is prepared by reacting a difunctional compound having the general formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are members of the group consisting of aliphatic, aromatic, cycloaliphatic and heterocyclic hydrocarbons which may contain functional groups selected from --OH, --OR.sub.5, --COOH, --COOR.sub.5, --CN, --Cl, --Br, --I, --F, and --CO--R.sub.5, wherein R.sub.5 is an aliphatic, aromatic, cycloaliphatic or heterocyclic hydrocarbon; X is oxygen or sulphur; Y is sulphur or nitrogen; n is an integer ranging from 1 to 3, or zero; R.sub.6 is a hydrogen or a hydrocarbon radical included in the above definition of R.sub.1 R.sub.2 R.sub.3 and R.sub.4 ; and m is the valence of Y, with carbon monoxide and oxygen in the presence of a catalyst selected from selenium, selenium compounds and complexes of copper, in the temperature range of from room temperature to 80.degree.
    Type: Grant
    Filed: February 4, 1976
    Date of Patent: August 16, 1977
    Assignee: Snam Progetti S.p.A.
    Inventors: Paolo Koch, Emilio Perrotti
  • Patent number: 4042495
    Abstract: Oily hydrocarbons which pollute the surface of water are removed therefrom by scattering over the polluted surface solid particles of nutrient salt containing nitrogen and phosphorous in a form that is readily assimilable by aqueous microorganisms capable of metabolizing hydrocarbons. The particles of nutrient salt are given a surface pretreatment with paraffine so that they are buoyant and only slowly soluble in water and lipophilic.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: August 16, 1977
    Assignee: Snam Progetti S.p.A.
    Inventors: Walter Marconi, Nicola Oddo, Ludwig Degen
  • Patent number: 4042609
    Abstract: A compound having catalytic properties which is a .sigma. or .pi. organic complex of a transition metal represented by the general formula: M (A).sub.n (L-C) (L).sub.m, wherein M is Ir or Re; L is a member of the group consisting of alkyl and aryl phosphines; (L-C) is (a) an alkyl or aryl phosphine ligand wherein a C-H bond is reacted with the central M atom to which the ligand is coordinated, and a metal-carbon bond is formed, or (b) a .pi.-allyl radical; A is a linear monoolefin having from 2 to 5 carbon atoms or a cyclic monoolefin having from 6 to 8 carbon atoms; n is a number in the range of 0 to 2 and is always zero when L-C is a .pi.-allyl radical; and m is a number from 1 to 3 which satisfies the valence of M, is prepared by reacting a hydride complex represented by the general formula: MHLn.sub.1 wherein M and L have the meaning given above, x is in the range from 5 to 7 and n.sub.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: August 16, 1977
    Assignee: Snam Progetti S.p.A.
    Inventors: Emilio Perrotti, Mario Clerici
  • Patent number: RE29338
    Abstract: A process is described whereby carbonic acid esters, i.e., alkyl, aryl and cycloalkyl carbonates, are prepared by reacting an alcohol with oxygen and carbon monoxide in the presence of a catalyst selected from copper complexed with an organic molecule.
    Type: Grant
    Filed: September 28, 1976
    Date of Patent: August 2, 1977
    Assignee: Snam Progetti S.p.A.
    Inventors: Emilio Perrotti, Gioacchino Cipriani