Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/16777
Title: Alkylation of aniline with ethanol over Zn1-x MnxFe2O4 (x= 0, 0.25, 0.50, 0.75 and 1) ferrite system
Authors: Dwivedi, Reena
Shyam, A Radhe
Prasad, R
Chauhan, H P S
Keywords: Alkylation;Aniline;Ethanol;Vapour phase;Fixed bed reactor;N-ethylanilines
Issue Date: Mar-2004
Publisher: NISCAIR-CSIR, India
IPC Code: C07B37/00, 211 /46
Abstract: N-Alkylation of aniline with ethanol has been studied in vapour phase, in a fixed bed reactor over Z1-xMnx Fe2O4 (X= 0, 0.25, 0.50, 0.75 and 1) ferrospinel system. N-ethylaniline (NEA) and N,N-diethylanilines (NNDEA) were found to be the major products. It was observed, that, systems possessing low x values are highly selective for N-ethylaniline. Reaction parameters were optimized over ZnFe2O4 catalyst. A maximum yield of 53% of N ethylaniline with selectivity of 97% and 1.79% of N, N-diethylaniline with selectivity of 3% was obtained over ZnFe2O4 catalyst at a temperature of 503 K, ethanol to aniline molar ratio 6 and weight hour space velocity of 0.17 h-1. Catalyst characterization has been made by XRD, IR spectroscopy and ammonia desorption methods. All catalysts show their characteristic M-O stretching bands around 700 and 500 cm-1 associated with tetrahedral and octahedral sites respectively. All catalysts were found to show weak, medium and strong acidic sites corresponding to ammonia desorption at different temperature ranges 423-523, 523-623 and 623-723 K. A tentative mechanism for production of N-ethylanilines has been proposed.
Page(s): 254-259
URI: http://hdl.handle.net/123456789/16777
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.11(2) [March 2004]

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