01391nas a2200241   4500008004100000022001400041245011500055210006900170260007300239300001200312490000600324520051400330653001700844653001800861653001800879653001900897653002400916653001200940653002700952100002300979700002801002856011901030       2007                        eng d  a1566-736700aTungstophosphoric acid supported on titania: a solid acid catalyst in benzylation of phenol with benzylalcohol0 aTungstophosphoric acid supported on titania a solid acid catalys  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a800-8060 v83 a<p>{Benzylation of phenol with benzylalcohol was carried out in liquid phase over tungstophosphoric acid (TPA) supported on titania. The catalysts were prepared with different TPA (10-25%) loading by wet impregnation method, were calcined at 700 degrees C and characterized by XRD, surface area, FTIR and acidity of the catalysts was measured by temperature programmed desorption of NH(3)-TPD, FTIR pyridine adsorption. The catalysts have been represented by a general formula as xPTiO(2)-Y (where x = wt%</p>10abenzyl ether10abenzyl phenol10abenzylalcohol10aHeteropolyacid10aphenyl benzyl ether10atitania10atungstophosphoric acid1 aKumbar, Suresh, M.1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/tungstophosphoric-acid-supported-titania-solid-acid-catalyst-benzylation-phenol01721nas a2200217   4500008004100000022001400041245017000055210006900225260007300294300001200367490000800379520086100387653001501248653001901263653001901282653001301301653001601314100002201330700002401352856012701376       2008                        eng d  a1381-116900aHeteropolyacid supported on acidic clay: a novel efficient catalyst for alkylation of ethylbenzene with dilute ethanol to diethylbenzene in presence of C-8 aromatics0 aHeteropolyacid supported on acidic clay a novel efficient cataly  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a155-1610 v2853 a<p>Vapor phase alkylation of ethylbenzene with ethanol to diethylbenzene is industrially relevant. Diethylbenzene is an important raw material for the conversion of divinyl benzene monomer. Conventionally, it is prepared from diacetophenone by reduction. It is also prepared by vapor phase alkylation of ethylbenzene with ethylene using zeolitic catalysts. The efficacy of dodecatungsotphosphoric acid (DTPA) supported on acid treated clay has been evaluated in the current work in the alkylation of ethylbenzene with 80% (w/w) ethanol. 15% (w/w) DTPA/K-10 clay was found to be an efficient and robust catalyst. The use of aqueous ethanol and a mixed C-8 stream lowers the cost of production. A kinetic model is developed by studying the important process parameters with 15% (w/w) DTPA/K-10 as the catalyst. (c) 2008 Elsevier B.V. All rights reserved.</p>10aAlkylation10adiethylbenzene10aHeteropolyacid10akinetics10aSolid acids1 aBokade, Vijay, V.1 aYadav, Ganapati, D.  uhttps://library.ncl.res.in/content/heteropolyacid-supported-acidic-clay-novel-efficient-catalyst-alkylation-ethylbenzene-001737nas 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-002036nas a2200217   4500008004100000022001400041245009500055210006900150260007300219300001200292490000700304520125700311653001601568653001601584653001801600653001301618653001901631100002201650700002401672856012201696       2011                        eng d  a0169-131700aHeteropolyacid supported on montmorillonite catalyst for dehydration of dilute bio-ethanol0 aHeteropolyacid supported on montmorillonite catalyst for dehydra  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG  a263-2710 v533 a<p>Vapour phase dehydration of dilute bio-ethanol (EtOH) to ethylene (E) and diethyl ether (DEE) is industrially relevant. Ethylene is an important raw material for many petrochemical products and Diethyl ether (DEE) can be used as an alternative fuel. The efficacy of montmorillonite (K-10) and dodecatungestophosphoric acid (DTPA) supported on montmorillonite (DTPA/K-10), has been evaluated in the current work in the dehydration of dilute bio-ethanol (80%m/m). The dehydration of ethanol and cracking of diethyl ether were studied independently. 30% m/m DTPA/K-10 was found to be more active with 74% ethanol conversion and 92% ethylene selectivity at 250 degrees C in comparison with other acid catalysts used. The merit of the process lies in its use of dilute bio-ethanol, a new avenue for ethylene production from a non-petroleum feedstock. Kinetic interpretation has been made by studying the important process parameters by using 30%m/m DTPA/montmorillonite as the catalyst. The mechanism of the dehydration of ethanol reaction suggests that two types of sites are responsible. The dehydration of ethanol and cracking of diethyl ether are second order reactions with weak adsorption of species. (C) 2011 Elsevier B.V. All rights reserved.</p>10aBio-ethanol10adehydration10aDiethyl ether10aEthylene10aHeteropolyacid1 aBokade, Vijay, V.1 aYadav, Ganapati, D.  uhttps://library.ncl.res.in/content/heteropolyacid-supported-montmorillonite-catalyst-dehydration-dilute-bio-ethanol-0