Patents Assigned to Clariant Specialty Fine Chemicals (France)
  • Patent number: 8754255
    Abstract: The invention relates to a method for preparing an aqueous solution of glyoxylic acid by oxidation of an aqueous solution of glyoxal with oxygen or a gas containing oxygen, in the presence of a catalytic quantity of nitric acid and/or at least one nitrogen oxide, a strong acid not oxidizing glyoxal, and by maintaining conditions satisfying the equation KLa/Q>10, where KLa is the total volumetric mass transfer coefficient and Q is the heat load liberated by the reaction per mole of glyoxal.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: June 17, 2014
    Assignee: Clariant Specialty Fine Chemicals (France)
    Inventors: François Bleger, Olivier Simon, Alain Schouteeten
  • Publication number: 20140114073
    Abstract: The invention relates to a method for producing metal complexes of formula (2) [MaLxXn]Ym (2), where M is a metal from the group consisting of Mn(II), Mn(III), Mn(IV), Fe(II), Fe(III) or Fe(IV), X is a coordinating compound selected from mono-, bi- or tri-charged anions or neutral molecules which can coordinate to a metal in mono-, bi- or tri-dentate form, Y represents a non-coordinating counter-ion which ensures charge equalization of the complex, L represents a ligand of formula (1) or the protonized or de-protonized form thereof, and a, x, n, m, R, R1, R2, R3 and z have the meanings described in claim 1. Said method is characterized in that the reaction of one or more ligands of formula (1) with an iron salt or manganese salt is carried out in an acetone/water mixture in a temperature range from 0 to 50° C.
    Type: Application
    Filed: October 6, 2011
    Publication date: April 24, 2014
    Applicants: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE), CLARIANT FINANCE (BVI) LIMITED
    Inventors: Christian Sidot, Audrey Caron, Miriam Ladwig, Gerd Reinhardt
  • Patent number: 8372176
    Abstract: The invention relates to the use of metal complexes comprising a ligand derived from 2-aryl-2-hydroxyacetic acid and a divalent or trivalent metal cation and to the use of the said ligands in dissolving divalent or trivalent metal cations in aqueous phase. The said complexes can be used to treat metal deficiencies in plants.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: February 12, 2013
    Assignee: Clariant Specialty Fine Chemicals (France)
    Inventors: Alain Schouteeten, Sébastien Jus, Claude Cathelineau
  • Patent number: 8350092
    Abstract: The invention relates to a process for preparing ?-aminoacetals substantially in racemic form, comprising a step of oxidizing optically enriched ?-aminoacetals to the corresponding oximes, in the presence of a catalyst, and a step of reducing the oximes thus obtained.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: January 8, 2013
    Assignee: Clariant Specialty Fine Chemicals (France)
    Inventors: Muriel Albalat, Geraldine Primazot, Didier Wilhelm, Jean-Claude Vallejos
  • Patent number: 8257832
    Abstract: The invention relates to aminoplast or phenoplast resins comprising the reaction product of the following compounds: a substituted or unsubstituted amine derivative or a substituted or unsubstituted phenol derivative; at least one glyoxal monoacetal; and glyoxylic acid, and also the compositions containing them and their uses as adhesives or binders.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: September 4, 2012
    Assignee: Clariant Specialty Fine Chemicals (France)
    Inventors: Didier Wilhelm, Ngoc Can Vu
  • Patent number: 8101804
    Abstract: A subject-matter of the present invention is a novel process for the synthesis of (E)-stilbene derivatives targeted at obtaining in particular resveratrol and piceatannol.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: January 24, 2012
    Assignee: Clariant Specialty Fine Chemicals (France)
    Inventors: Alain Schouteeten, Sébastien Jus, Jean-Claude Vallejos
  • Publication number: 20110034726
    Abstract: The invention relates to a process for preparing optically active ?-aminoacetals by resolution of a racemic mixture or of a mixture of enantiomers via the formation of diastereoisomeric salts, and also novel intermediates in the form of diastereoisomeric salts.
    Type: Application
    Filed: January 21, 2009
    Publication date: February 10, 2011
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventors: Muriel Albalat, Geraldine Primazot, Didier Wilhelm, Jean-Claude Vallejos
  • Publication number: 20110012056
    Abstract: The invention relates to a method for preparing an aqueous solution of glyoxylic acid by oxidation of an aqueous solution of glyoxal with oxygen or a gas containing oxygen, in the presence of a catalytic quantity of nitric acid and/or at least one nitrogen oxide, a strong acid not oxidizing glyoxal, and by maintaining conditions satisfying the equation KLa/Q>10, where KLa is the total volumetric mass transfer coefficient and Q is the heat load liberated by the reaction per mole of glyoxal.
    Type: Application
    Filed: January 21, 2009
    Publication date: January 20, 2011
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventors: Francois Bleger, Olivier Simon, Alain Schouteeten
  • Publication number: 20100324342
    Abstract: The invention relates to a process for the synthesis of stilbene derivatives of formula (I)-(E) or (I)-(Z) in which R represents hydrogen or an OH group, by deprotection in the presence of an aluminium halide and of a tertiary amine of a compound of formula (II)-(E) or (II)-(Z) in which A represents hydrogen or an OR?1 group, and R1, R2, R3 and R?1 independently represent an alkyl or aralkyl group.
    Type: Application
    Filed: September 23, 2008
    Publication date: December 23, 2010
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventors: Jean-Claude Vallejos, Alain Schouteeten, Didier Wilhelm
  • Publication number: 20100312011
    Abstract: The invention relates to a process for separating glyoxylic acid starting from an aqueous reaction medium containing glyoxylic acid and hydrochloric acid, comprising a step of countercurrent steam stripping of the reaction medium in order to obtain, on the one hand, a gas phase containing the volatile hydrochloric acid and, on the other hand, a liquid phase containing the purified glyoxylic acid.
    Type: Application
    Filed: January 21, 2009
    Publication date: December 9, 2010
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventor: Olivier Simon
  • Publication number: 20100288004
    Abstract: The invention relates to the use of metal complexes comprising a ligand derived from 2-aryl-2-hydroxyacetic acid and a divalent or trivalent metal cation and to the use of the said ligands in dissolving divalent or trivalent metal cations in aqueous phase. The said complexes can be used to treat metal deficiencies in plants.
    Type: Application
    Filed: May 21, 2007
    Publication date: November 18, 2010
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventors: Alain Schouteeten, Sébastien Jus, Claude Cathelineu
  • Publication number: 20100247941
    Abstract: The invention relates to aminoplast or phenoplast resins comprising the reaction product of the following compounds: a substituted or unsubstituted amine derivative or a substituted or unsubstituted phenol derivative; at least one glyoxal monoacetal; and glyoxylic acid, and also the compositions containing them and their uses as adhesives or binders.
    Type: Application
    Filed: May 21, 2007
    Publication date: September 30, 2010
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventors: Didier Wilhelm, Ngoc Can Vu
  • Publication number: 20100152490
    Abstract: The invention relates to a process for preparing ?-aminoacetals substantially in racemic form, comprising a step of oxidizing optically enriched ?-aminoacetals to the corresponding oximes, in the presence of a catalyst, and a step of reducing the oximes thus obtained.
    Type: Application
    Filed: May 21, 2007
    Publication date: June 17, 2010
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventors: Muriel Albalat, Geraldine Primazot, Didier Wilhelm, Jean-Claude Vallejos
  • Publication number: 20100137633
    Abstract: The invention relates to a process for the preparation of N-protected ?-aminoaldehydes by deacetalization of the acetal functional group of corresponding N-protected ?-aminoacetals using formic acid.
    Type: Application
    Filed: April 2, 2008
    Publication date: June 3, 2010
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventors: Muriel Albalat, Geraldine Primazot, Didier Wilhelm, Jean-Claude Vallejos
  • Publication number: 20100004483
    Abstract: A subject-matter of the present invention is a novel process for the synthesis of (E)-stilbene derivatives targeted at obtaining in particular resveratrol and piceatannol.
    Type: Application
    Filed: July 25, 2007
    Publication date: January 7, 2010
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventors: Alain Schouteeten, Sébastien Jus, Jean-Claude Vallejos