Method for preparing of halogenated hydrocarbons
AssigneeSolvay (Societe Anonyme)
InventorsVéronique Mathieu, Francine Janssens
Life of this patent
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Abstract
Halohydrocarbons comprising at least 3 carbon atoms are obtained by reaction between a haloalkane and a haloolefin, in the substantial absence of nitrile, and by introducing the reactants in a molar ratio between the haloalkane and the haloolefin of less than 2. 1,1,1,3,3-Pentachloropropane can thus be obtained in good voluminal yield.
Claims18
A process for the preparation of halohydrocarbons comprising at least 3 carbon atoms, by catalytic reaction between a haloalkane selected from the group consisting of dichloromethane, chloroform, carbon tetrachloride and 1,1,1-trichloroethane and a haloolefin, of the formula
- in which Y represents H or Cl, X represents Cl or F and R represents H, Cl, F or CH3 characterized in that the reaction is carried out in the substantial absence of nitrile and with a molar ratio between the haloalkane and the haloolefin of less than 2 and the reaction is carried out in the presence of a catalytic system comprising a catalyst selected from the group consisting of an amine, amide and a trialkylphosphine oxide.
A process for the preparation of halohydrocarbons of the formula
- CnH(2n+2)−pClp
- where
- r is an integer form 3 to 4 and
- p is an integer rom 3 to 7,
- comprising a catalytic reaction between a haloalkane selected from the group consisting of dichloromethane, chloroform, carbon tetrachloride and 1,1,1-trichloroethane and a haloolefin, characterized in that the reaction is carried out in the substantial absence of nitrile and with a molar ratio between the haloalkane and the haloolefin of less than 2 and the reaction is carried out in the presence of a catalytic system comprising a catalyst selected from the group consisting of an amine, amide and a trialkylphosphine oxide.
Dependencies are inferred from the claim text.