Vapour phase ethylation of aniline was carried out over alkali and alkaline earth exchanged zeolites Y and β. Reaction conditions were optimised for N-alkylation by varying reaction parameters like temperature, WHSV, mole ratio and time on stream. Over all zeolites, N-alkylation is much higher than C-alkylation. Diethyl carbonate is a better N-alkylating agent than ethanol. Among the catalysts studied, Kβ is a good N-monoalkylating catalyst with 41% aniline conversion and 100% selectivity at 473 K, WHSV 19.8 h-1 and diethyl carbonate/aniline ratio 2.
Bibliographical noteFunding Information:
The authors thank the IPCL-CATAD division for their generous gift of zeolite NaY (Si/Al=2.56). The suggestions given by S. Sivasanker, Deputy Director, NCL, Pune are also gratefully acknowledged. S. Yuvaraj thanks UGC, India for financial assistance.
- Aniline ethylation
- Diethyl carbonate
- Zeolites Y and β