Patents by Inventor Pier P. Rossi

Pier P. Rossi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4791228
    Abstract: A process for preparing .alpha.,.omega.-dicarboxylic acids of the formula OC--(CH.sub.2).sub.n --COOH in which n=6 to 10 is disclosed. The process consists of the catalytic oxidation of a compound of formula X--(CH.sub.2).sub.n --CHO wherein X is CHO or COOH and n is 6 to 10 by O.sub.2 pure or in mixture with inert gas, possibly under pressure, in at least one polar solvent, at a temperature comprised between 20.degree. and 90.degree. C. and in the presence of a catalyst. The catalyst is chosen from the group consisting of at least one cobalt (II) salt and one ferrous salt. The amount of the catalyst is .ltoreq.0.001 mol % calculated on the equivalents of the aldehyde groups in the starting compound.
    Type: Grant
    Filed: February 12, 1985
    Date of Patent: December 13, 1988
    Assignee: SNIA Viscosa Societa' Nazionale Industria Applicazioni Viscosa S.p.A.
    Inventors: Francesco Siclari, Pier P. Rossi, Luigi Canavesi
  • Patent number: 4613694
    Abstract: Process for the concurrent preparation of olefinically unsaturated or satted .alpha.,.omega.-dialdehydes and .alpha.,.omega.-diacids, characterized by the fact that the monoozonide of a a mono- or polyunsaturated cycloolefine in solution in a polar solvent, is treated with water and subsequently with an alkaline aqueous solution at room pressure and at a temperature from -5.degree. C. to 70.degree. C., maintaining during the addition of the alkali, a pH not higher than 12, the dialdehyde and the diacid being subsequently isolated by known, conventional methods.
    Type: Grant
    Filed: September 30, 1980
    Date of Patent: September 23, 1986
    Assignee: Snia Viscosa Societa' Nazionale Industria Applicazioni Viscosa S.p.A.
    Inventors: Pier P. Rossi, Salvatore Marchetti
  • Patent number: 4399292
    Abstract: A process for separating and recovering organic compounds from an oxygen-taining recycle gas deriving from an ozonization process is disclosed. The process comprises the separation of products in form of fumes from the gas, the countercurrent scrubbing of the gas with a polyoxyalkyleneglycol containing 2-4 carbon atoms, pre-treated with a monocarboxylic acid anhydride and/or the countercurrent scrubbing of the gas with the polyoxyalkyleneglycol or with an excess of a base. The organic compounds are recovered either by stripping (at atmospheric pressure or under vacuum) or by hydrolysis followed by distillation (at atmospheric pressure or under vacuum).
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: August 16, 1983
    Assignee: Snia Viscosa Societa Nazional Industria Applicazioni Viscosa sPa
    Inventors: Pier P. Rossi, Roberto Jacuone, Franco Magnoni
  • Patent number: 4349473
    Abstract: Process for the preparation of .omega.-lactams (in particular caprolactam) ith improved yields, by reaction of cycloaliphatic derivatives having the general formula: ##STR1## wherein n=3-13 with nitrosating agents in the presence of dehydrating agents, characterized by the fact that the reaction is carried out a low temperature which is constant between stages, and in all the zones of a stage and with particular concentrations of the dehydrating agent.
    Type: Grant
    Filed: October 21, 1980
    Date of Patent: September 14, 1982
    Assignee: SNIA Viscosa Societa' Nazionale Industria Applicazioni Viscosa S.p.A
    Inventors: Pier P. Rossi, Mario Catoni
  • Patent number: 4265628
    Abstract: A process for the preparation of fire retardant formed bodies such as yarns and films of acrylic polymers is disclosed. The process comprises subjecting the polymer to sulphuration and subjecting the sulphurated polymer to a basic treatment by means of an alkali metal hydroxide, such as sodium hydroxide, whereby the polymer molecule acquires a cyclic structure.
    Type: Grant
    Filed: July 27, 1979
    Date of Patent: May 5, 1981
    Assignee: SNIA Viscosa Societa' Nazionale Industria
    Inventors: Pier P. Rossi, Aldo Tempesti, Aldo Filippi