Halogenation of aromatic amine compounds (US Patent 5149875)

Patent number: 5149875 Granted: 1992-09-22 Filed: 1991-01-15 Inventors: Jerry R. Patton (Ballwin, MO, US); Narayanasamy Gurusamy (Ballwin, MO, US) Assignees: Mallinckrodt Specialty Chemicals Company (St. Louis, MO, US)

Abstract

Aromatic amine compounds are halogenated in the presence of a quaternary ammonium halide.

Claims

1. A process for halogenating an aromatic amine compound, comprising forming a mixture including an aromatic amine compound and quaternary ammonium halide, and halogenating the aromatic amine compound