Abstract
The rearrangement of phenylhydrazine too- andp-phenylenediamines was carried out over ZSM-5 and its modified catalysts. Sm and V showed the promoting effect. In presence of ammonia flow Ga and Cr modified ZSM-5 catalysts gave good yields ofo- andp-phenylenediamines. The better temperature and WHSV for this reaction are found to be 400°C and 0.25 h−1 respectively. The SiO2/Al2O3 catalyst showed very low ortho-para selectivity when compared with zeolite catalysts.
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