@article { ISI:000271443200024,
	title = {Synthesis of N-methylaniline by aniline alkylation with methanol over Sn-MFI molecular sieve},
	journal = {Catalysis Letters},
	volume = {133},
	number = {1-2},
	year = {2009},
	month = {NOV},
	pages = {175-184},
	publisher = {SPRINGER},
	address = {233 SPRING ST, NEW YORK, NY 10013 USA},
	abstract = {<p>Sn-MFI molecular sieves (Tin silicalite-1) with SiO(2)/SnO(2) molar ratio of 50-150 were synthesized and characterized. Elemental analysis, XRD and DRUV-vis confirmed that prepared samples were of MFI zeolite structure and Sn was incorporated in MFI framework. Vapor phase methylation of aniline over Sn-MFI was systematically studied and optimizations of process parameters were carried out. Sn-MFI (SiO(2)/SnO(2) = 50) was found to be optimum catalyst with 55\% aniline conversion and 60\% N-methylaniline selectivity. At lower space velocity (higher contact time) of 1 h(-1), aniline conversion was found to be increased to 71\% with reduction in N-methylaniline selectivity to 39\% and increased in N,N-dimethylaniline selectivity to 58\%. The reaction follows first order kinetics with respect to aniline having activation energy of 7.3 kcal/mol.</p>},
	keywords = {Aniline, Lewis acid, Methanol, N-methylaniline, Sn-MFI},
	issn = {1011-372X},
	doi = {10.1007/s10562-009-0143-4},
	author = {Niphadkar, P. S. and Joshi, P. N. and Gurav, H. R. and Deshpande, Suvarna S. and Bokade, Vijay V.}
}
@article { ISI:000263249600064,
	title = {Tin-silicalite-1: synthesis by dry gel conversion, characterization and catalytic performance in phenol hydroxylation reaction},
	journal = {Materials Chemistry and Physics},
	volume = {114},
	number = {1},
	year = {2009},
	month = {MAR},
	pages = {344-349},
	publisher = {ELSEVIER SCIENCE SA},
	address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND},
	abstract = {<p>Tin-silicalite-1 (Sn-MFI) has been successfully synthesized by dry gel conversion (DGC) method. The influence of various synthesis parameters such as crystallization time, temperature, water content at the bottom of autoclave, molar ratios of (TPA)(2)O/SiO(2) and SiO(2)/SnO(2) in dry gel on the crystallization kinetics and physico-chemical properties of Sn-MFI materials has been investigated. Powder-X-ray diffraction (XRD),XPS,AAS, DRUV-vis and SEM techniques were employed as characterization tools. Time-dependent studies revealed that, the progressive crystallization of Sn-MFI depend not only on the synthesis time but also on the other various synthesis parameters. Increase in the crystallization temperature, water content at bottom of autoclave (TPA)(2)O/SiO(2) and SiO(2)/SnO(2) molar ratios in dry gel resulted in the lowering of overall crystallization period. A good correspondence between the chemical composition of the surface and the bulk indicated the uniform distribution of Sn(4+) ions. The presence of these ions in tetrahedral coordination has been indicated by DRUV-vis spectral studies. Although, not better but comparable activity has been shown by Sn-MFI prepared by dry gel conversion method with Sn-MFI prepared by conventional hydrothermal crystallization method in the hydroxylation of phenol reaction. Increase in concentration of isolated Sn(4+) ions led to increase in phenol conversion and H(2)O(2) efficiency. (c) 2008 Elsevier B.V. All rights reserved.</p>},
	keywords = {crystallisation, Dry gel conversion, microporous materials, Sn-MFI},
	issn = {0254-0584},
	doi = {10.1016/j.matchemphys.2008.09.026},
	author = {Niphadkar, Prashant S. and Kotwal, Mehejabeen S. and Deshpande, Shilpa S. and Bokade, Vijay V. and Joshi, Praphulla N.}
}
