Patents by Inventor Paolo Burattin

Paolo Burattin 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: 7105696
    Abstract: The invention concerns a method for hydrocyanation of ethylenically unsaturated organic compounds comprising at least a nitrile function. The invention provides a method for hydrocyanation of an ethylenically unsaturated hydrocarbon compound by reacting in liquid medium the hydrogen cyanide in the presence of a catalyst comprising a metal element selected among transition metals and an organophosphorous ligand, characterised in that the organophosphorous ligand is a furylphosphine. The invention is in particular useful for synthesizing adiponitrile from butadiene.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: September 12, 2006
    Assignee: Rhodia Polymide Intermediates
    Inventors: Paolo Burattin, Alex Chamard, Jean-Christophe Galland
  • Patent number: 7098358
    Abstract: The invention concerns a method for hydrocyanation of ethylenically unsaturated organic compounds into compounds comprising at least a nitrile function. More particularly, it concerns a method for hydrocyanation of organic compounds comprising at least a ethylenical bond by reacting hydrogen cyanide, in the presence of a catalytic system comprising a transition metal and an organophosphorus ligand. The organophosphorus ligand is a compound with monophosphanorbornadiene structure. The invention concerns in particular hydrocyanation of butadiene into adiponitrile.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: August 29, 2006
    Assignee: Rhodia Polyamides Intermediates
    Inventors: Paolo Burattin, Jean-Christophe Galland, Alex Chamard
  • Patent number: 6884751
    Abstract: Hydrocyanation catalysts comprising aqueous solutions of at least one water-soluble phosphine and nickel values, well suited for the hydrocyanation of ethylenically unsaturated organic compounds such as diolefins, olefinic nitrites and monolefins, are produced by (a) admixing an aqueous solution of such at least one water-soluble phosphine with a nickel hydroxide, (b) adding hydrogen cyanide or a compound which generates hydrogen cyanide to the mixture thus formed, (c) stirring the resulting mixture until the nickel values have at least partially dissolved, and (d) reducing at least a portion of said nickel values having an oxidation state of greater than zero to the zero oxidation state.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: April 26, 2005
    Assignee: Rhodia Feber & Resin Intermedaites
    Inventors: Paolo Burattin, Pierre Coqueret, Marc Huser
  • Publication number: 20040063956
    Abstract: The invention concerns a method for hydrocyanation of ethylenically unsaturated organic compounds into compounds comprising at least a nitrile function. More particularly, it concerns a method for hydrocyanation of organic compounds comprising at least a ethylenical bond by reacting hydrogen cyanide, in the presence of a catalytic system comprising a transition metal and an organophosphorus ligand. The organophosphorus ligand is a compound with monophosphanorbornadiene structure. The invention concerns in particular hydrocyanation of butadiene into adiponitrile.
    Type: Application
    Filed: September 24, 2003
    Publication date: April 1, 2004
    Inventors: Paolo Burattin, Jean-Christophe Galland, Alex Chamard
  • Publication number: 20040063991
    Abstract: The invention concerns a method for hydrocyanation of ethylenically unsaturated organic compounds comprising at least a nitrile function. The invention provides a method for hydrocyanation of an ethylenically unsaturated hydrocarbon compound by reacting in liquid medium the hydrogen cyanide in the presence of a catalyst comprising a metal element selected among transition metals and an organophosphorous ligand, characterised in that the organophosphorous ligand is a furylphosphine. The invention is in particular useful for synthesizing adiponitrile from butadiene.
    Type: Application
    Filed: November 6, 2003
    Publication date: April 1, 2004
    Inventors: Paolo Burattin, Alex Chamard, Jean-Christophe Galland
  • Publication number: 20030204109
    Abstract: Water-soluble sulfonated organophosphorus compounds are purified by at least partially removing contaminating sulfite values therefrom, by decreasing the pH of a solution of such sulfonated organophosphorus compounds to a value of less than or equal to 4, and maintaining the pH of the solution at this value of 4 or less for such period of time as to reduce the weight concentration of sulfite in the solution to less than 100 ppm; the organophosphorus compounds thus purified are well suited for the two-phase cocatalysis of a wide variety of organic reactions.
    Type: Application
    Filed: April 22, 2003
    Publication date: October 30, 2003
    Applicants: RHODIA FIBER, RESIN INTERMEDIATES
    Inventors: Larbi Aouni, Paolo Burattin, Pierre Coqueret, Marc Huser
  • Patent number: 6613939
    Abstract: Water-soluble sulfonated organophosphorus compounds are purified by at least partially removing contaminating sulfite values therefrom, by decreasing the pH of a solution of such sulfonated organophosphorus compounds to a value of less than or equal to 4, and maintaining the pH of the solution at this value of 4 or less for such period of time as to reduce the weight concentration of sulfite in the solution to less than 100 ppm; the organophosphorus compounds thus purified are well suited for the two-phase cocatalysis of a wide variety of organic reactions.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: September 2, 2003
    Assignee: Rhodia Fiber & Resin Intermediates
    Inventors: Larbi Aouni, Paolo Burattin, Pierre Coqueret, Marc Huser
  • Patent number: 6492525
    Abstract: The invention concerns novel organometallic complexes comprising cationic heterocyclic carbenes. It also concerns a method for preparing said complexes from dicationic heterocyclic precursor compounds. It further concerns the use as catalysts of said organometallic complexes for a certain number of chemical reactions.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: December 10, 2002
    Assignee: Rhodia Fiber & Resin Intermediates
    Inventors: Guy Bertrand, Lutz Stelzig, Olivier Guerret, Christophe Buron, Heinz Gornitzka, Paolo Burattin
  • Patent number: 6469194
    Abstract: Ethylenically unsaturated organic compounds, for example diolefins, olefinic nitriles and monoolefins, are noncontaminatingly hydrocyanated into corresponding nitriles by (a) reacting such ethylenically unsaturated organic compounds with hydrogen cyanide in the presence of an aqueous solution containing a catalytically effective amount of a catalyst which comprises at least one nickel compound and at least one water-soluble phosphine, (b) thereafter separating the organic phase from the aqueous phase which result, the separated aqueous phase comprising a solid phase formed during hydrocyanation, and (c) thence treating the separated aqueous phase, or a solid phase removed therefrom, with hydrogen cyanide to thus at least partially dissolve said solid phase contained therein or removed therefrom.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: October 22, 2002
    Assignee: Rhodia Fiber & Resin Intermediates
    Inventors: Paolo Burattin, Pierre Coqueret, Marc Huser
  • Patent number: 6417375
    Abstract: The present invention relates to novel water-soluble furylphosphines. It also relates to organometallic complexes comprising these furylphosphines and to the use of such complexes. It also relates to the process for the preparation of the water-soluble furylphosphines.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: July 9, 2002
    Assignee: Rhodia Fiber & Resin Intermediates
    Inventors: Francois Mathey, Philippe Savignac, Frederic Eymery, Paolo Burattin
  • Publication number: 20020026066
    Abstract: Hydrocyanation catalysts comprising aqueous solutions of at least one water-soluble phosphine and nickel values, well suited for the hydrocyanation of ethylenically unsaturated organic compounds such as diolefins, olefinic nitrites and monolefins, are produced by (a) admixing an aqueous solution of such at least one water-soluble phosphine with a nickel hydroxide, (b) adding hydrogen cyanide or a compound which generates hydrogen cyanide to the mixture thus formed, (c) stirring the resulting mixture until the nickel values have at least partially dissolved, and (d) reducing at least a portion of said nickel values having an oxidation state of greater than zero to the zero oxidation state.
    Type: Application
    Filed: June 22, 2001
    Publication date: February 28, 2002
    Inventors: Paolo Burattin, Pierre Coqueret, Marc Huser
  • Publication number: 20020022736
    Abstract: Ethylenically unsaturated organic compounds, for example diolefins, olefinic nitrites and monoolefins, are noncontaminatingly hydrocyanated into corresponding nitrites by (a) reacting such ethylenically unsaturated organic compounds with hydrogen cyanide in the presence of an aqueous solution containing a catalytically effective amount of a catalyst which comprises at least one nickel compound and at least one water-soluble phosphine, (b) thereafter separating the organic phase from the aqueous phase which result, the separated aqueous phase comprising a solid phase formed during hydrocyanation, and (c) thence treating the separated aqueous phase, or a solid phase removed therefrom, with hydrogen cyanide to thus at least partially dissolve said solid phase contained therein or removed therefrom.
    Type: Application
    Filed: June 22, 2001
    Publication date: February 21, 2002
    Inventors: Paolo Burattin, Pierre Coqueret, Marc Huser
  • Publication number: 20020016497
    Abstract: Water-soluble sulfonated organophosphorus compounds are purified by at least partially removing contaminating sulfite values therefrom, by decreasing the pH of a solution of such sulfonated organophosphorus compounds to a value of less than or equal to 4, and maintaining the pH of the solution at this value of 4 or less for such period of time as to reduce the weight concentration of sulfite in the solution to less than 100 ppm; the organophosphorus compounds thus purified are well suited for the two-phase cocatalysis of a wide variety of organic reactions.
    Type: Application
    Filed: June 25, 2001
    Publication date: February 7, 2002
    Inventors: Larbi Aouni, Paolo Burattin, Pierre Coqueret, Marc Huser
  • Patent number: 6200926
    Abstract: Solid catalysts suited for the fluidized/moving bed catalytic ammoxidation of alkanes comprise an active catalytic phase having the empirical formula (I): VSbaSnbTicFedEeOx  (I) in which E is an element which provides an oxide of rutile structure or an element which, in combination with V, Sb, Sn, Ti, Fe and/or with another element E, provides a phase of rutile or trirutile structure, or a solid solution of rutile structure, a is a whole or fractional number equal to or greater than 0.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: March 13, 2001
    Assignee: R. P. Fiber & Resin Intermediates
    Inventors: Gilbert Blanchard, Paolo Burattin, Fabrizio Cavani, Stéfano Masetti, Ferruccio Trifiro
  • Patent number: 6083869
    Abstract: The present invention relates to a process for the preparation of mixed vanadium, antimony and iron oxides and to their use as catalysts for the ammoxidation of alkanes. The process for the preparation of a mixed oxide defined above is characterized in that:respective vanadium, antimony and iron compounds are dissolved in at least one saturated alcohol or in water,the alcoholic .epsilon.olution or the aqueous solution thus obtained is brought into contact with an aqueous solution containing an ammonium salt, in order to precipitate the mixed oxide,the mixed oxide obtained is separated and calcined.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: July 4, 2000
    Assignee: Rhodia Fiber and Resin Intermediates
    Inventors: Stefania Albonetti, Gilbert Blanchard, Paolo Burattin, Fabrizio Cavani, Ferruccio Trifiro
  • Patent number: 6072070
    Abstract: Mixed oxide vanadium/antimony/titanium ammoxidation catalysts, particularly suited for the ammoxidation of alkanes and exhibiting X-ray diffraction spectra which are characteristic of a crystallographic phase of rutile TiO.sub.2, are prepared by (a) dissolving respective soluble compounds of vanadium, of antimony and of titanium in at least one saturated alcohol, (b) contacting the alcoholic solution thus obtained with water and precipitating the mixed oxide therefrom, and (c) separating and calcining the mixed oxide thus precipitated.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: June 6, 2000
    Assignee: R.P. Fiber & Resin Intermediates
    Inventors: Stefania Albonetti, Gilbert Blanchard, Paolo Burattin, Fabrizio Cavani, Ferruccio Trifiro
  • Patent number: 5686381
    Abstract: Vanadium/antimony/tin mixed oxides having the empirical formula (I):VSb.sub.a Sn.sub.b O.sub.x (I)exhibit an X-ray diffraction pattern characteristic of a crystallographic phase of rutile SnO.sub.2, are well suited as catalysts for the vapor phase ammoxidation of alkanes, and are conveniently prepared by (a) dissolving respective compounds of vanadium, antimony and tin in at least one saturated alcohol, (b) intimately contacting the alcoholic solution thus obtained with an aqueous solution containing an ammonium salt, thus precipitating the mixed oxides therefrom, and (c) separating and calcining these mixed oxides.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: November 11, 1997
    Assignee: Rhone-Poulenc Chimie
    Inventors: Stefania Albonetti, Gilbert Blanchard, Paolo Burattin, Fabrizio Cavani, Ferruccio Trifiro
  • Patent number: 5663392
    Abstract: Mixed oxide vanadium/antimony/titanium ammoxidation catalysts, particularly suited for the ammoxidation of alkanes and exhibiting X-ray diffraction spectra which are characteristic of a crystallographic phase of rutile TiO.sub.2, are prepared by (a) dissolving respective soluble compounds of vanadium, of antimony and of titanium in at least one saturated alcohol, (b) contacting the alcoholic solution thus obtained with water and precipitating the mixed oxide therefrom, and (c) separating and calcining the mixed oxide thus precipitated.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: September 2, 1997
    Assignee: R.P. Fiber & Resin Intermediates
    Inventors: Stefania Albonetti, Gilbert Blanchard, Paolo Burattin, Fabrizio Cavani, Ferruccio Trifiro