摘要 |
<p>A process for halogenation of benzene or benzene derivatives, by which dihalogenated benzene derivatives having halogen atoms at positions para to each other or trihalogenated derivatives having halogen atoms at the 1-, 2-, and 4-positions can be selectively produced. In halogenating benzene or a benzene derivative by using a zeolite catalyst, a zeolite (such as zeolite L) which either contains fluorine or has a crystallite diameter of 100 nm or below is used as the catalyst. The reaction is preferably conducted in the presence of a solvent, the solvent being preferably a halogen-containing compound.</p> |