Patents by Inventor Dominique Balthasart

Dominique Balthasart 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 1,1,1-trifluoroethane
    Patent number: 5545772
    Abstract: 1,1,1-Trifluoroethane (HFC-143a) is produced in the liquid phase by reaction between vinylidene fluoride and hydrogen fluoride, in the absence of catalyst.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: August 13, 1996
    Assignee: Solvay (Soci et e Anonyme)
    Inventors: Pascal Pennetreau, Dominique Balthasart
  • Process for the removal of water from a solution by azeotropic distillation and process for the production of a hydrofluoroalkane
    Patent number: 5514251
    Abstract: The invention relates to binary azeotropic compositions between water and 1,1-dichloro-1-fluoroethane, 1-chloro-1,1-difluoroethane, 1,1,1-trifluoroethane, 1,1,1,2-tetrafluoroethane, 1,1-difluoroethane or trifluoroethylene, to a process for the removal of water from solutions by azeotropic distillation using these compositions, as well as to a process for the production of a hydrofluoroalkane in which water is removed from the mixture of reaction products by azeotropic distillation using these compositions.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: May 7, 1996
    Assignee: Solvay (Societe Anonyme)
    Inventors: Dominique Balthasart, Andre Jacquemart
  • Compositions containing 1,1,1,2-tetrafluoroethane and methyl chloride and use of these compositions
    Patent number: 5294358
    Abstract: A composition including from 40 to 55 mol % of 1,1,1,,2-tetrafluoroethane and from 45 to 60 mol % of methyl chloride; and a composition including from 68 to 75 mol % of 1,1,1,2-tetrafluoroethane and from 25 to 32 mol % of methyl chloride. These compositions are useful as porogenic agents for polystyrene, as refrigerating fluids, and as blowing agents for polyurethane and polyolefin foams.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: March 15, 1994
    Assignee: Solvay (Societe Anonyme)
    Inventors: Paul Dantinne, Pierre Barthelemy, Dominique Balthasart
  • Process for inhibiting the corrosion of a mass of metal in contact with an acid bath containing ferric ions
    Patent number: 4765958
    Abstract: Process for inhibiting the corrosion of a mass of metal (2) in contact with an acid bath (3) containing ferric ions, according to which at least a part of the bath (3) is circulated through a stack of felts (10) made of carbon or graphite, alternating with perforated plates made of iron or an iron alloy (9). The process applies to the pickling of metallurgical products made of steel in hydrochloric acid baths.
    Type: Grant
    Filed: April 9, 1985
    Date of Patent: August 23, 1988
    Assignee: Solvay & Cie, S.A.
    Inventors: Daniel Tygat, Pierre Lefevre, Dominique Balthasart