Patents by Inventor Giuseppe Braca

Giuseppe Braca 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).

  • Nickel catalyst active in ethylene homo and copolymerization
    Patent number: 5391662
    Abstract: A catalyst active in the preparation of ethylene homo and copolymers consists of a nickel complex bound to a polystyrene support and definable by the general formula (I): ##STR1## in which Ph, m and n have the meaning given in the description. The catalyst preparation and its use in ethylene polymerization and ethylene copolymerization with other unsaturated monomers are described.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: February 21, 1995
    Assignee: Enichem S.p.A.
    Inventors: Giuseppe Braca, Anna M. Raspolli Galletti, Stefano Pinori, Glauco Sbrana
  • Nickel catalyst active in ethylene homo and copolymerization
    Patent number: 5328882
    Abstract: A catalyst active in the preparation of ethylene homo and copolymers consists of a nickel complex bound to a polystyrene support and definable by the general formula (I): ##STR1## in which Ph, m and n have the meaning given in the description. The catalyst preparation and its use in ethylene polymerization and ethylene copolymerization with other unsaturated monomers are described.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: July 12, 1994
    Assignee: Enichem S.P.A.
    Inventors: Giuseppe Braca, Anna M. Raspolli Galletti, Stefano Pinori, Glauco Sbrana
  • Polymerization catalyst, the process for its preparation and its use in ethylene homo and copolymerization
    Patent number: 5026675
    Abstract: A catalyst active in the polymerization of ethylene or the copolymerization of ethylene with unsaturated monomers consists of a nickel complex catalyst bonded to a polystyrene substrate, and definable by the general formula (I): ##STR1## where R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 have the meanings given in the description.The preparation is described of the catalyst and its use in the polymerization of ethylene and the copolymerization of ethylene with other unsaturated monomers.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: June 25, 1991
    Assignee: Eniricerche S.p.A.
    Inventors: Giuseppe Braca, Alessandro Ricci, Glauco Sbrana, Maurizio Brunelli, Aldo Giusti, Guglielmo Bertolini, Anna M. R. Galletii
  • Process for producing ethyl acetate by homologation of methyl acetate
    Patent number: 4780566
    Abstract: A process is described for producing ethyl acetate either alone or in mixture with acetic acid, by homologation of methyl acetate with CO and H.sub.2 in the presence of a catalyst in the form of a Ru compound and a catalysis promoter of hard acid type.The process has considerable advantages over known processes, in particular with regard to the reaction rate and the low formation of undesirable by-products.
    Type: Grant
    Filed: March 8, 1984
    Date of Patent: October 25, 1988
    Assignee: Consiglio Nazionale Delle Ricerche
    Inventors: Giuseppe Braca, Glauco Sbrana, Anna M. Raspolli, Franco Zanni
  • Process for preparing esters from ethers or esters of lower homologous alcohols
    Patent number: 4189441
    Abstract: A process is disclosed for preparing esters having the general formulae:RCOOCH.sub.2 R'andR'COOCH.sub.2 Rwherein R and R' are linear or branched alkyl radicals either like or unlike each other, and containing from 1 to 16 carbon atoms, or considered together, forming a cycloaliphatic ring having up to 7 carbon atoms, wherein carbon monoxide and hydrogen are reacted, at temperatures ranging from 150.degree. to 350.degree. C. and at pressures ranging from 50 to 1000 atmospheres, with an ether of formula R O R' or esters of formula RCOOR' and R'COOR, in which R and R' have the same meanings as specified hereinabove, and in the presence of a catalyst system comprising a ruthenium carbonyl and a promoter selected from the class consisting of hydroiodic acid, carboxylic acid solutions of inorganic or tetraalkylammonium bromides and iodides, and mixtures of these promoters.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: February 19, 1980
    Assignee: Montedison S.p.A.
    Inventors: Giuseppe Braca, Glauco Sbrana, Guglielmo Gregorio