Patents by Inventor Jacques Chazal

Jacques Chazal 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).

  • Process for the preparation of citral
    Patent number: 5177265
    Abstract: An improved method for preparing citral in liquid phase from prenol and prenal, wherein, in a single reaction enclosure, the prenol and prenal are condensed in the presence of a mineral acid at a concentration of about 5.10.sup.-3 mole for one mole of prenal, 90 to 95% of the acid is neutralized, and once excess prenal and prenol is eliminated, the citral is distilled.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: January 5, 1993
    Assignee: Rhone-Poulenc Sante
    Inventors: Pierre Chabardes, Jacques Chazal
  • Process for the preparation of citral
    Patent number: 4933500
    Abstract: Citral is prepared from prenol and prenal by condensation to form an acetal followed by cracking, both operations being effected in the presence of a lithium halide (e.g. lithium chloride) as catalyst.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: June 12, 1990
    Assignee: Rhone-Poulenc Sante
    Inventors: Pierre Chabardes, Jacques Chazal