Patents by Inventor Francine Janssens

Francine Janssens 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 difluoromethane
    Patent number: 5817894
    Abstract: Difluoromethane is produced from dichloromethane and hydrogen fluoride by continuous reaction in a liquid medium comprising an inorganic fraction and an organic fraction, in which a content by weight of the said organic fraction in the liquid medium is maintained at less than or equal to 25% of the sum of the inorganic and organic fractions and a content by weight of dichloromethane in the liquid medium is maintained at less than or equal to 10% of the sum of the inorganic and organic fractions.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: October 6, 1998
    Assignee: Solvay (Societe Anonyme)
    Inventors: Vincent Wilmet, Francine Janssens
  • Process for the hydrofluorination of chloro (fluoro) butane
    Patent number: 5739406
    Abstract: Process for the hydrofluorination of chloro(fluoro)butane of general formula C.sub.4 H.sub.5 Cl.sub.x F.sub.5-x in which x=1 to 5, by means of hydrogen fluoride and in the presence of a catalyst chosen from the derivatives of metals of groups IIIa, IVa, IVb, Va, Vb and VIb of the Periodic Table of the elements.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: April 14, 1998
    Assignee: Solvay (Societe Anonyme)
    Inventors: Pascal Pennetreau, Francine Janssens
  • Process for the preparation of 1,1-difluoroethane
    Patent number: 5714652
    Abstract: The invention relates to a process for the preparation of 1,1-difluoroethane by reaction of vinyl chloride with hydrogen fluoride, in the presence of perchloroethylene or 1,1,1,3,3-pentafluorobutane.
    Type: Grant
    Filed: April 11, 1996
    Date of Patent: February 3, 1998
    Assignee: Solvay (Societe Anonyme)
    Inventors: Frans Grunchard, Francine Janssens, Vincent Wilmet
  • Process for the preparation of difluoromethane
    Patent number: 5714653
    Abstract: Difluoromethane is produced by reaction, in the liquid phase, between dichloromethane and hydrogen fluoride, in the presence of a titanium or tin halide.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: February 3, 1998
    Assignee: Solvay
    Inventors: Vincent Wilmet, Francine Janssens
  • Process for the preparation of chlorination derivatives of pyridine compounds and utilization of bis(trichloromethyl) sulfone in the process
    Patent number: 5696269
    Abstract: The invention concerns a process for the preparation of chlorinated derivatives of pyridine compounds by a chlorination reaction of the corresponding pyridine compounds with molecular chlorine, carried out in the gaseous phase by means of bis(trichloromethyl)sulfone as a free radical initiator.The obtained chlorinated derivatives of pyridine compounds, such as 2,6-dichloropyridine, can be used as chemical intermediates.
    Type: Grant
    Filed: February 3, 1993
    Date of Patent: December 9, 1997
    Assignee: Reilly Chemicals S.A.
    Inventors: James Franklin, Francine Janssens
  • Process for the preparation of 1,1,1,2-tetrafluoroethane
    Patent number: 5382721
    Abstract: Process for the preparation of 1,1,1,2-tetrafluoroethane by reaction of hydrogen fluoride with a trihaloethylene according to which trifluoroethylene is chosen as trihaloethylene and the reaction is carried out in the liquid phase.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: January 17, 1995
    Assignee: Solvay (Societe Anonyme)
    Inventors: Pascal Pennetreau, Francine Janssens, Max Braun, Johannes Eicher, Werner Rudolph, Eckhard Hausmann
  • Process for the preparation of 1,1-dichloro-1-fluoroethane
    Patent number: 5367102
    Abstract: The invention relates to a thermal process the production of 1,1-dichloro-1-fluoroethane by hydrofluorination of vinylidene chloride carried out in the absence of any catalyst.
    Type: Grant
    Filed: December 8, 1992
    Date of Patent: November 22, 1994
    Assignee: Solvay (Societe Anonyme)
    Inventors: Francine Janssens, James Franklin
  • Process for preparing 1,1-dichloro-1,3,3,3-tetra-fluoropropane
    Patent number: 5347059
    Abstract: The invention relates to a process for preparing 1,1-dichloro-1,3,3,3-tetrafluoropropane by reacting, in the liquid phase, 1,1,1,3,3,3-hexachloropropane with hydrogen fluoride, in the presence of a catalyst.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: September 13, 1994
    Assignee: Solvay (Societe Anonyme)
    Inventors: Pascal Pennetreau, Francine Janssens, Pierre Barthelemy
  • Process for the purification of 1,1-dichloro-1-fluoroethane
    Patent number: 5318673
    Abstract: Process for the purification of crude 1,1-dichloro -1-fluoroethane by treatment with chlorine in the presence of an organic free radical initiator and then distillation.
    Type: Grant
    Filed: April 6, 1993
    Date of Patent: June 7, 1994
    Assignee: Solvay (Societe Anonyme)
    Inventors: Rene Walraevens, Francine Janssens, Jean-Pierre Catinat
  • Process for the production of chloroform from carbon tetrachloride, catalytic compositions and process for obtaining them
    Patent number: 5146013
    Abstract: The invention relates to a process for the production of chloroform from carbon tetrachloride using a catalytic composition comprising a support on which a hydrogenating metal is deposited, the support comprising an alkali metal aluminate or alkaline earth metal aluminate.The invention also relates to a catalytic composition comprising a support on which platinum is deposited, the support comprising an aluminate having an inverse spinel structure.
    Type: Grant
    Filed: March 14, 1991
    Date of Patent: September 8, 1992
    Assignee: Solvay & Cie (Societe Anonyme)
    Inventors: Charles Dogimont, James Franklin, Francine Janssens, Jean-Paul Schoebrechts
  • Process for the manufacture of a fluorinated hydrocarbon
    Patent number: 4968850
    Abstract: The invention relates to a process for the manufacture of a fluorinated hydrocarbon by the reaction of hydrogen fluoride with an unsaturated chlorinated hydrocarbon in the liquid phase in the presence of a catalyst constituted by a tin compound and of an additive constituted by an organophosphorus compound.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: November 6, 1990
    Assignee: Solvay & Cie (Societe Anonyme)
    Inventors: James Franklin, Francine Janssens