Synthesis of pyridine and picolines over modified silica-alumina and ZSM-5 catalysts |
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Authors: | R Ramachandra Rao S J Kulkarni M Subrahmanyam and A V Rama Rao |
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Institution: | (1) Indian Institute of Chemical Technology, 500 007 Hyderabad, India |
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Abstract: | In the reaction of acetaldehyde, formaldehyde and ammononia over HZSM-5 (Si/Al-280), PbZSM-5 and WZSM-5 catalysts at 420°C, 0.5 h–1 weight hourly space velocity, the total yields of pyridine and 3-picoline obtained were 58.2, 42.8 and 78.3 wt.% based on aldehydes, respectively. In the reaction of acetaldehyde and ammonia over typical Pb–SiO2–Al2O3 (20% PbO), W–SiO2–Al2O3 (10% W), Pb–Cr–SiO2–Al2O3 (F) and Pb–Cu–SiO2–Al2O3 (E) catalysts at 420°C, 0.5 h–1 W.H.S.V., the yields of 2- and 4-picolines obtained were 51.1, 66.1, 80.6 and 53.7 wt.%, respectively.IICT Communication No. 3421, — dedicated to Dr. A.V. Rama Rao on his 60th birthday. |
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