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Title: Triflamide anchored SBA-15 catalyst for nitration of alkyl aromatics in microwave
Authors: Ganjala, Venkata Siva Prasad
Mutyala, Suresh
Neeli, Chinna Krishna Prasad
Khagga, Mukkanti
Rao, Kamaraju Seetha Rama
Burri, David Raju
Keywords: Catalysts;Nitration;Metal-free nitration;Triflamide anchored SBA-15;Alkyl aromatics;Xylene
Issue Date: 19-Apr-2014
Abstract: A series of triflamide anchored SBA-15 (SBA-NH-TA) catalysts with 5-20 wt% triflic acid (TA) loadings have been synthesized through the functionalization of propylamine on the surface of SBA-15 (SBA-NH2), followed by covalent attachment of triflic acid with –NH2 group of SBA-NH2. With SBA-NH-TA as catalyst and 69% HNO3 as nitrating agent, highly accelerated and safe nitration of aromatic compounds in microwave under solvent-free conditions has been achieved. The structural and textural characteristics of SBA-NH-TA catalysts have been determined from N2 sorption and low-angle XRD techniques. As the loading of TA increases, the conversion of alkylaromatics to their nitrated products increases significantly. Reaction parameters like amount of catalyst, amount of triflic acid loading, substrate to nitric acid ratio, reaction temperature and reaction time have been investigated.
Page(s): 545-549
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.53A(04-05) [April-May 2014]

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