Chlorination of nitrophenols (US Patent 4827047)

Patent number: 4827047 Granted: 1989-05-02 Filed: 1988-03-07 Inventors: Jean-Roger Desmurs (Saint-Symphorien D'Ozon, FR); Isabelle Jouve (Villeurbanne, FR) Assignees: Rhone-Poulenc Chimie (Courbevoie, FR)

Abstract

The chloronitrophenols, e.g., 2,6-dichloro-4-nitrophenol (a known agrochemical/pharmaceutical intermediate), are efficiently prepared by chlorinating ortho- or para-nitrophenol with gaseous chlorine, characteristically in the molten state, and in the presence of a catalytically effective amount of a primary, secondary or