Rhone-Poulenc Chimie

Rhone-Poulenc Specialites Chimiques

Jean-Claude Leblanc

Serge Ratton

Jean-Roger Desmurs

Bernard Besson

The polychlorophenols, e.g., 2,6-dichlorophenol (a known agrochemical intermediate), are effectively prepared by chlorinating ortho-chlorophenol with gaseous chlorine, optionally in the presence of other chlorophenols, characteristically in the molten state, and in the presence of a catalytically effective amount of a primary, secondary or tertiary amine.

Chlorination of ortho-chlorophenol

Phenolic compounds and mixtures thereof, e.g., admixture of 2,4-dichlorophenol and 2,6-dichlorophenol, are selectively chlorinated at a position ortho to a hydroxyl function thereof, by reacting such phenolic compound with gaseous chlorine, in a molten reaction medium, in the presence of a catalytically effective amount of a primary, secondary or tertiary amine.

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Grenoble, France

Jean-Claude Leblanc