Patents by Inventor Xavier Sava

Xavier Sava 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: 7683145
    Abstract: A method for the emulsion polymerization of one or more olefins by reacting a ligand of general formulae Ia and Ib or a mixture of at least two ligands Ia or Ib, wherein R respectively represents one or several of the following radicals; hydrogen, halogen, nitrile, C1-C12-alkyl groups, C1-C12-alkoxy groups, C7-C13-aralkyl groups, C6-C14-aryl groups, and wherein identical or different compounds of general formulae Ia and Ib can, optionally, be concatenated by one or several bridges, with a phosphine compound PR3? and a metal compound of general formula M(L2)2 or M(L2)2 (L1)z, wherein the variables are defined as follows: M is a transition metal of groups 7-10 in the periodic system of the elements; L1 represents phosphanes (R5)xPH3-x or amines (R5)xNH3-x with identical or different radicals R5, ether (R5)2O, H2O, alkohols (R5)OH, pyridine, pyridine derivatives of formula C5H5-x(R5)xN, CO, C1-C12-alkylnitriles, C6-C14-arylnitriles or ethylenically unsaturated double bond systems, wherein x is a whole number ran
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: March 23, 2010
    Assignee: BASF SE
    Inventors: Mubarik Mahmood Chowdhry, Markus Schmid, Peter Preishuber-Pfluegl, Xavier Sava, Horst Weiss, Stefan Mecking, Florian M. Bauers
  • Publication number: 20100063320
    Abstract: The invention relates to a process for preparing formic acid, in which catalytic hydrogenation of carbon dioxide with hydrogen over a catalyst which comprises a metal of groups 8 to 10 of the Periodic Table in the presence of a primary, secondary and/or tertiary amine generates the corresponding ammonium formate and the ammonium formate is split by heating into formic acid and the amine, which comprises selecting the primary, secondary or tertiary amine from the amines of the formula I or mixtures thereof where R1 to R3 are the same or different and are each hydrogen, linear or branched alkyl radicals having from 1 to 18 carbon atoms, cycloaliphatic radicals having from 5 to 7 carbon atoms, aryl radicals and/or arylalkyl radicals, and at least one of the R1 to R3 radicals bears a hydroxyl group, and performing the hydrogenation in a solvent which has a boiling point of 105° C.
    Type: Application
    Filed: March 18, 2008
    Publication date: March 11, 2010
    Inventors: Nina Challand, Xavier Sava, Michael Röper
  • Patent number: 7566760
    Abstract: The invention relates to a method for the production of aqueous polymer dispersions, by the polymerisation of one or more olefins in aqueous media in the presence of dispersing agents and optionally organic solvents, characterised in that the polymerisation of the olefin(s) is catalysed by means of one or more complex compounds of general formula (I), where at least one of the groups R1 to R9 must be in the form of a group of the following general formula (II) where Z=an electron-withdrawing group and n=a whole number from 1 to 5.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: July 28, 2009
    Assignee: BASF Aktiengesellschaft
    Inventors: Mubarik Mahmood Chowdhry, Markus Schmid, Peter Preishuber-Pfluegl, Xavier Sava, Horst Weiss, Stefan Mecking, Martin Zuideveld, Florian M. Bauers
  • Publication number: 20090030093
    Abstract: Process for the emulsion polymerization of one or more olefins by reacting a quinoid compound with a metal compound and a phosphine compound which is substituted by at least one polar radical and subsequently using the reaction product for the polymerization or copolymerization of olefins in water or in a solvent mixture which contains at least 50% by weight of water and at least one emulsifier.
    Type: Application
    Filed: July 28, 2008
    Publication date: January 29, 2009
    Applicant: BASF Aktiengessellschaft
    Inventors: Mubarik Mahmood Chowdhry, Xavier Sava, Monica Haag, Jacob Wildeson, Stefan Mecking, Ludmila Kolb
  • Patent number: 7462673
    Abstract: Process for preparing an aqueous polymer dispersion by polymerization of at least one olefinically unsaturated compound in an aqueous medium in the presence of at least one dispersant and a solid polymerization catalyst.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: December 9, 2008
    Assignee: BASF Aktiengesellschaft
    Inventors: Markus Schmid, Mubarik Mahmood Chowdhry, Peter Preishuber-Pfluegl, Xavier Sava, Ekkehard Lindner, Mahmoud Sunjuk, Peter Wegner
  • Patent number: 7417098
    Abstract: Process for the emulsion polymerization of one or more olefins by reacting a quinoid compound with a metal compound and a phosphine compound which is substituted by at least one polar radical and subsequently using the reaction product for the polymerization or copolymerization of olefins in water or in a solvent mixture which contains at least 50% by weight of water and at least one emulsifier.
    Type: Grant
    Filed: November 6, 2004
    Date of Patent: August 26, 2008
    Assignee: BASF SE
    Inventors: Mubarik Mahmood Chowdhry, Xavier Sava, Monica Haag, Jacob Wildeson, Stefan Mecking, Ludmila Kolb
  • Publication number: 20080182915
    Abstract: Process for the emulsion polymerization of one or more olefins by preparing a catalyst by reacting a quinoid compound with a metal compound and a phosphine compound which is substituted by at least one polar radical; and subsequently (co)polymerizing said one or more olefins in water or in a solvent mixture which contains at least 50% by weight of water and at least one emulsifier.
    Type: Application
    Filed: April 1, 2008
    Publication date: July 31, 2008
    Applicant: BASF Aktiengesellschaft
    Inventors: Mubarik Mahmood Chowdhry, Xavier Sava, Monica Haag, Jacob Wildeson, Stefan Mecking, Ludmila Kolb
  • Publication number: 20070055011
    Abstract: Process for preparing an aqueous polymer dispersion by polymerization of at least one olefinically unsaturated compound in an aqueous medium in the presence of at least one dispersant and a solid polymerization catalyst.
    Type: Application
    Filed: May 6, 2004
    Publication date: March 8, 2007
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Markus Schmid, Mubarik Chowdhry, Peter Preishuber-Pflugl, Xavier Sava, Ekkehard Lindner, Mahmoud Sunjuk, Peter Wegner
  • Publication number: 20070043163
    Abstract: Process for the emulsion polymerization of one or more olefins by reacting a quinoid compound with a metal compound and a phosphine compound which is substituted by at least one polar radical and subsequently using the reaction product for the polymerization or copolymerization of olefins in water or in a solvent mixture which contains at least 50% by weight of water and at least one emulsifier.
    Type: Application
    Filed: November 6, 2004
    Publication date: February 22, 2007
    Applicant: BASF Aktiengesellschaft
    Inventors: Mubarik Chowdhry, Xavier Sava, Monica Haag, Jacob Wildeson, Stefan Mecking, Ludmila Kolb
  • Patent number: 7145042
    Abstract: The invention relates to a method for producing dialdehydes and/or ethylenically unsaturated monoaldehydes by reacting at least one compound with at least two ethylenically unsaturated double bonds with carbon monoxide and hydrogen in the presence of a hydroformylating catalyst with at least one complex of a metal of subgroup VIII. The subgroup comprises at least pnicogen chelate ligands.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: December 5, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Volland, Wolfgang Ahlers, Klaus Ebel, Rocco Paciello, Michael Röper, Thomas Mackewitz, Volker Böhm, Xavier Sava, Oliver Löber, Oliver Bey, Jürgen Stephan, Frank Haese
  • Publication number: 20060252938
    Abstract: A process for the separation of palladium from solvent-free at room temperature solid crude reaction mixtures comprising aryl acetic acids of the general formula (I), wherein Z means phenyl, napht-2-yl, 9H-fluoren-2-yl, substituted carbazol-2-yl, benzoxazol-5-yl, either of which can be substituted with H, C1-C8-alkyl optionally cyclic and optionally substituted with —F or —Cl, C6-C10-aryl optionally substituted with F or Cl OR4, COR5, F, —Cl; optionally substituted pyrrolyl or dehydropyrrolyl or 1-oxo-1,3-dehydro-isoindol 2-yl; R1 means H or C1-C4-alkyl; R2, R3, R4, R5 mean independently of each other H, C1-C8 alkyl, C6-C10-aryl optionally substituted with —F or Cl, or thiophenyl; which crude mixture is obtained by palladium catalyzed carbonylation, by adsorption of the palladium on solid adsorbents, characterized in that the adsorption is carried out in the absence of a reducing agent for palladium and at a temperature, where the crude reaction mixture is molten.
    Type: Application
    Filed: April 16, 2004
    Publication date: November 9, 2006
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Xavier Sava, Michael Röper, Colin Orgill, John Cooper
  • Patent number: 7112650
    Abstract: A process for preparing thermoplastic poly(3-hydroxyalkanoates) with a molar mass greater than 6 000 g/mol and a melting point in the range from 70 to 170° C., by reacting an oxirane compound with carbon monoxide in the presence of a transition metal catalyst which has rhodium(0), nickel(0), iron(0), cobalt(0) or palladium(0) as central metal and has been chelated with neutral Lewis bases, and also in the presence of diisocyanates, ortho esters, acetals, anhydrides, P2O5, MgO, MgCl2, MgSO4, zeolites, or a mixture of these, at a pressure in the range from 1 to 250 bar and at from room temperature to 150° C.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: September 26, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Slany, Gerrit Luinstra, Xavier Sava
  • Patent number: 7074965
    Abstract: A system comprising a diphosphine of the formula R1>P—(CH)n—PR2R3 where R1 is a divalent radical which together with the phosphorus atom to which it is linked forms an unsubstituted or substituted 2-phosphatricyclo[3.3.1.1{3,7}]decyl group or a derivative thereof in which one or more of the carbon atoms are replaced by heteroatoms, R2, R3 are each, independently of one another, a monovalent radical having from 1 to 20 atoms or together form a divalent radical having from 2 to 20 atoms, n is 4 or 5, and a mixture of such diphosphines, and palladium or a palladium compound is suitable as carbonylation catalyst for the carbonylation of a conjugated diene.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: July 11, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Xavier Sava, Michael Slany, Michael Röper
  • Publication number: 20060052645
    Abstract: The invention relates to a method for producing dialdehydes and/or ethylenically unsaturated monoaldehydes by reacting at least one compound with at least two ethylenically unsaturated double bonds with carbon monoxide and hydrogen in the presence of a hydroformylating catalyst with at least one complex of a metal of subgroup VIII. The subgroup comprises at least pnicogen chelate ligands.
    Type: Application
    Filed: September 12, 2003
    Publication date: March 9, 2006
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Martin Volland, Wolfgang Ahlers, Klaus Ebel, Rocco Paciello, Michael Roper, Thomas Mackewitz, Volker Bohm, Xavier Sava, Oliver Lober, Oliver Bey, Jurgen Stephan, Frank Haese
  • Publication number: 20050261452
    Abstract: A method for the emulsion polymerization of one or more olefins by reacting a ligand of general formulae Ia and Ib or a mixture of at least two ligands Ia or Ib, wherein R respectively represents one or several of the following radicals; hydrogen, halogen, nitrile, C1-C12-alkyl groups, C1-C12-alkoxy groups, C7-C13-aralkyl groups, C6-C14-aryl groups, and wherein identical or different compounds of general formulae Ia and Ib can, optionally, with a phosphine compound PR3? and a metal compound of general formula M(L2)2 or M(L2)2 (L1)z, wherein the variables are defined as follows: M is a transition metal of groups 7-10 in the periodic system of the elements; L1 represents phosphanes (R5)xPH3-x or amines (R5)xNH3-x with identical or different radicals R5, ether (R5)2O, H2O, alkohols (R5)OH, pyridine, pyridine derivatives of formula C5H5-x(R5)xN, CO, C1-C12-alkylnitriles, C6-C14-arylnitriles or ethylenically unsaturated double bond systems, wherein x is a whole number ranging from 0-3, L2 represents halogenide ion
    Type: Application
    Filed: July 16, 2003
    Publication date: November 24, 2005
    Applicant: BASF Aktiengesellschaft
    Inventors: Mubarik Chowdhry, Markus Schmid, Peter Preishuber-Pflugl, Xavier Sava, Horst Weiss, Stefan Mecking, Florian Bauers
  • Publication number: 20050250920
    Abstract: A process for preparing aqueous polymer dispersions by polymerizing one or more olefins in an aqueous medium in the presence of dispersants and, if desired, of organic solvents comprises catalyzing the polymerization of said olefin(s) using one or more metal complex compounds of the formula I where at least one of the radicals R1 to R9 is necessarily in the form of a radical of the formula II below where Z is an electron-withdrawing group and n is an integer from 1 to 5.
    Type: Application
    Filed: July 24, 2003
    Publication date: November 10, 2005
    Inventors: Mubarik Chowdhry, Markus Schmid, Peter Preishuber-Pflugl, Xavier Sava, Horst Weiss, Stefan Mecking, Martin Zuideveld, Florian Bauers
  • Publication number: 20040249216
    Abstract: A system comprising a diphosphine of the formula
    Type: Application
    Filed: April 1, 2004
    Publication date: December 9, 2004
    Inventors: Xavier Sava, Michael Slany, Michael Roper
  • Publication number: 20040171760
    Abstract: A process for preparing thermoplastic poly(3-hydroxyalkanoates) with a molar mass greater than 6 000 g/mol and a melting point in the range from 70 to 170° C., by reacting an oxirane compound with carbon monoxide in the presence of a transition metal catalyst which has rhodium(0), nickel(0), iron(0), cobalt(0) or palladium(0) as central metal and has been chelated with neutral Lewis bases, and also in the presence of diisocyanates, ortho esters, acetals, anhydrides, P2O5, MgO, MgCl2, MgSO4, zeolites, or a mixture of these, at a pressure in the range from 1 to 250 bar and at from room temperature to 150° C.
    Type: Application
    Filed: January 20, 2004
    Publication date: September 2, 2004
    Inventors: Michael Slany, Gerrit Luinstra, Xavier Sava