Patents Assigned to Societe Elf France
  • Process for improving the combustion of gas oils
    Patent number: 4396400
    Abstract: This process consists in adding to gas oil from 100 to 5000 ppm of water in the form of a micellar clear and limped solution, which is stable for long times, obtained by the addition of one or more surfactants, associated with one or more auxiliary surface-active agents (co-surfactants). This invention substantially improves the combustion of gas oils.
    Type: Grant
    Filed: April 14, 1981
    Date of Patent: August 2, 1983
    Assignee: Societe Elf France
    Inventors: Henri Grangette, Jean Bouvier
  • Detergent compositions, their manufacture and their use as additives for fuels
    Patent number: 4375974
    Abstract: A nitrogen-containing composition, useful as a detergent for gasoline, is obtained by reacting at least one unsaturated anhydride with at least one olefin to convert 20-80% of the anhydride and thereafter reacting the resultant product with a polyamine of the general formulaH.sub.2 N--[(--CH.sub.2 --)--.sub.n NH].sub.m R.sup.7wherein R.sup.7 is a monovalent aliphatic radical of 6-30 carbon atoms, n is an integer from 2 to 5 and m is an integer from 1 to 10.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: March 8, 1983
    Assignees: Institut Francais du Petrole, Societe Elf France
    Inventors: Paul Maldonado, Choua Cohen, Bernard Sillion