Solvay (societe Anonyme)

Solvay Sa

Charles-Marie Anciaux

Dominique Balthasart

V&eacute;ronique Mathieu

Yves Mahaut

Roland Klug

Vincent Wilmet

Alain Lambert

Dominique Lecroc

Process for the production of a hydrofluoroalkane, according to which hydrofluoroalkane comprising organic impurities is subjected to at least two distillations.

Process for the production of a purified hydrofluoroalkane, purified hydrofluoroalkane, use of the hydrofluoroalkane and method for the analysis of a hydrofluoroalkane

Method for obtaining a purified hydrofluoroalkane, purified hydrofluoroalkane, use of same and method for analysing same

1,1-Difluoroethane containing less than 10 mg/kg of vinyl chloride is obtained by treatment, with hydrogen fluoride, of a crude 1,1-difluoroethane containing less than 1 mol of hydrogen chloride per mole of 1,1-difluoroethane.

Process for producing and purifying 1,1-difluoroethane, and product thus obtained

Halohydrocarbons comprising at least 3 carbon atoms are obtained by batchwise reaction between a haloalkane and an olefin in the presence of a catalyst and a co-catalyst. The addition of at least some of the co-catalyst is carried out gradually. At least some of the co-catalyst is recovered with a view to its re-use.

Process for preparing halohydrocarbons in the presence of a co-catalyst

Halohydrocarbons containing at least 3 carbon atoms are obtained by reaction between a haloalkane and an olefin in the presence of a catalyst in a reaction medium which is essentially free of water.

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Tavaux, France

Charles-Marie Anciaux