Patents by Inventor Fran.cedilla.ois Figueras

Fran.cedilla.ois Figueras 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).

  • Selective aldolization of acetone to diacetone alcohol by a solid basic catalyst
    Patent number: 5672764
    Abstract: The aldolization is characterized by the use of a solid basic catalyst which has the following general formula?(Mg.sup.2+).sub.1-x (Al.sup.3+).sub.x (OH.sup.-).sub.2 !.sup.+x ?(OH.sup.-).sub.x (H.sub.2 O).sub.n !.sup.-x (II)wherein 0.20.ltoreq.x.ltoreq.0.33 and n has a value of less than 1. This catalyst has a defined crystal structure similar to that of hydrotalcite or, alternatively, of meixnerite. Also disclosed are processes for the preparation of the catalyst.
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: September 30, 1997
    Assignee: Elf Atochem S.A.
    Inventors: Remy Teissier, Didier Tichit, Fran.cedilla.ois Figueras, Jacques Kervennal