01737nas a2200217   4500008004100000022001400041245009700055210006900152260007300221300001200294490000700306520095500313653001501268653001201283653001901295653002401314653002001338100001801358700002201376856012101398       2009                        eng d  a0169-131700aSelective N-alkylation of aniline with methanol over a heteropolyacid on montmorillonite K100 aSelective Nalkylation of aniline with methanol over a heteropoly  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a255-2580 v443 a<p>N-methylaniline is an industrially important product in the manufacture of paper, textile dyes, drugs, perfumes and explosives. The vapour phase alkylation of aniline with methanol forming N-methylaniline is advantageous over liquid phase alkylation. In present study, vapour phase methylation of aniline over dodecatungestophosphoric acid supported on K10 montmorillonite was systematically studied and optimization of process parameters was carried out. The 20% m/m DTPA/K10 was found to be optimum with 79% aniline conversion and 99% N-methylaniline selectivity. The reaction required milder operating conditions than reported for commercial catalysts. We also studied the feasibility of 20% m/m DTPA/K10 as a catalyst for the alkylation of aniline with other alcohols like ethanol, n-propanol, iso-propanol and n-butanol. The activity of 20% m/m DTPA/K10 decreased with increasing carbon number. (C) 2009 Elsevier B.V. All rights reserved.</p>10aAlkylation10aAniline10aHeteropolyacid10amontmorillonite K1010aN-methylaniline1 aNehate, Manoj1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/selective-n-alkylation-aniline-methanol-over-heteropolyacid-montmorillonite-k10-001491nas a2200217   4500008004100000022001400041245012200055210006900177260007300246300001200319490000700331520068400338653001601022653001201038653001801050653001901068653002401087100002001111700002201131856012001153       2010                        eng d  a1003-995300aSynthesis of ethyl acetate by esterification of acetic acid with ethanol over a heteropolyacid on montmorillonite K100 aSynthesis of ethyl acetate by esterification of acetic acid with  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a161-1640 v193 a<p>In present work, liquid phase esterification of acetic acid with ethanol over dodecatungestophosphoric acid (DTPA) supported on K10 mommorillonite was systematically studied and optimization of process parameters was carried out The 20% m/m urpAtK tO was found to be the optimum catalyst with 90% acetic acid conversion and 100% ethyl acetate selectivity The study was also explored to see the feasibility of 20% m/m DTPA/K10 as a catalyst for the alkylation of acetic acid with other alcohols like methanol, iso-propanol and sr-butanol. The 20% m/m DTPA/K10 has shown increased activity with the increase in carbon number, at the same alcohol reflux The results are novel</p>10aAcetic acid10aEthanol10aethyl acetate10aHeteropolyacid10amontmorillonite K101 aGurav, Hanumant1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/synthesis-ethyl-acetate-esterification-acetic-acid-ethanol-over-heteropolyacid-002353nas a2200229   4500008004100000022001400041245016000055210006900215260006700284300001200351490000700363520144500370653001601815653003301831653001901864653001801883653002401901100002401925700002901949700002201978856012302000       2014                        eng d  a0894-323000aPseudo-homogeneous kinetic model for esterification of acetic acid with propanol isomers over dodecatungstophosphoric acid supported on montmorillonite k100 aPseudohomogeneous kinetic model for esterification of acetic aci  a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcFEB  a121-1270 v273 a<p>Esterification of acetic acid with propanol isomers such as isopropanol and naEuropropanol was carried out over dodecatungstophosphoric acid (DTPA), dodecamolybdophosphoric acid ammonium salt hydrate, and sodium tungstate hydrated purified supported on montmorillonite K10, which were characterized by powder XaEuroray diffraction, BrunaueraEuro'EmmettaEuro'Teller, and temperature programmed ammonia desorption. A pseudoaEurohomogeneous (PaEuroH) kinetic model was established for esterification of acetic acid with propanol isomers over DTPA supported on montmorillonite K10. Effects of various parameters such as reaction time, speed of agitation, particle size, temperature, percent catalyst loading, molar ratio and mixture of propanol isomer were investigated in detail. The 20% (w/w) DTPA/K10 was found to be an optimum solid catalyst with 82% naEuropropanol and 53% isopropanol conversion with 100% selectivity toward propyl acetate. The 20% (w/w) DTPA/K10 catalyst was found to be reusable for three cycles. The reaction follows secondaEuroorder kinetics with activation energies of 25.53aEuro?kJaEuro?mol(a?'1) and 28.15aEuro?kJaEuro?mol(a?'1) for isopropanol and naEuropropanol, respectively. PseudoaEurohomogeneous kinetic model fitted with R-2 value of trend line 0.999. This implies that esterification reaction is kinetically controlled owing to high activation energy. Copyright a (c) 2013 John Wiley &amp; Sons, Ltd.</p>10aAcetic acid10adodecatungstophosphoric acid10aEsterification10akinetic model10amontmorillonite K101 aGurav, Hanumant, R.1 aNandiwale, Kakasaheb, Y.1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/pseudo-homogeneous-kinetic-model-esterification-acetic-acid-propanol-isomers-over-0