A catalyst composition with a high halogenated aromatics isomerization
activity, a halogenated aromatic isomerization method using said catalyst
composition, and a halogenated aromatics isomerization method capable of
prolonging the life or regeneration period of the catalyst. The invention
also includes a catalyst composition characterized in that the maximum
diameter of secondary particles of the zeolite in the formed catalyst is 5
microns or less is used to improve the halogenated aromatics isomerization
activity. Furthermore, if dissolved oxygen is decreased, the life or
regeneration period of the catalyst can be prolonged.
