Solvay (Societe Anonyme)

Solvay Sa

Solvay & Cie (Societe Anonyme)

Solvay Interox (Societe Anon.)

Pascal Pennetreau

Francine Janssens

Dominique Balthasart

Werner Rudolph

Max Josef Braun

Pierre Barthelemy

Johannes Eicher

Noel Vanlautem

V&eacute;ronique Mathieu

Eckhard Hausmann

Alain Vandenbussche

The invention relates to a process for the preparation of 1-chloro-1-fluoroethane and 1,1-difluoroethane by reaction of vinyl chloride with hydrogen fluoride, in an organic solvent consisting of at least one saturated halogen-containing hydrocarbon.

Process for the preparation of 1-chloro-1-fluoroethane and/or 1,1-difluoroethane

The invention relates to a process for the preparation of chloro-1-fluoroethane and 1,1-difluoroethane by reaction of vinyl chloride with hydrogen fluoride, in organic solvent consisting of at least one saturated halogen-containing hydrocarbon.

Hydrogenation catalysts based on palladium, platinum or rhodium comprising at least one other metal M which are deposited on zirconium oxide and silicon oxide supports. Process for the manufacture of these catalysts by successive impregnation of the support using palladium, platinum or rhodium and using another metal M. Use of these catalysts in hydrogenation reactions and in particular in preparing hydrogen peroxide.

Hydrogenation catalysts, method for making same and use thereof for preparing hydrogen peroxide

Process for manufacturing an aqueous hydrogen peroxide solution

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.

Process for the hydrofluorination of chloro (fluoro) butane

1,1,1-Trifluoroethane is produced, in addition to 1,1,-dichloro-1-fluoroethane and/or 1-chloro-1,1-difluoroethane, by hydrofluorination in the liquid phase, using hydrogen fluoride, vinylidene fluoride and at least one chloro compound chosen from vinylidene chloride and 1,1,1-trichloroethane.

Process for the manufacture of 1,1,1-trihaloethanes

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.

Process for the preparation of 1,1,1-trifluoroethane

The invention relates to compositions comprising 1,1,1,3,3-pentafluorobutane and ethanol. These compositions can be used especially as solvents for cleaning electronic components and for degreasing metals.

Compositions comprising pentafluorobutane and use of these compositions

Purification of crude 1,1-difluoroethane (HFA-152a) from vinyl chloride, by bringing into contact with an active carbon.

Process for the purification of 1,1-difluoroethane

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.

Process for the preparation of 1,1,1,2-tetrafluoroethane

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.

Process for preparing 1,1-dichloro-1,3,3,3-tetra-fluoropropane

Process for the preparation of .beta.-hydroxybutyric acid esters, comprising:

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Rixensart, Belgium

Pascal Pennetreau