01904nas a2200241   4500008004100000022001400041245008400055210006900139260007300208300000900281490000700290520107400297653002301371653001601394653001501410653002601425653001301451100002301464700001701487700002201504700001901526856011701545       2006                        eng d  a1387-181100aClaisen rearrangement of allyl phenyl ether over zeolites beta, mordenite and Y0 aClaisen rearrangement of allyl phenyl ether over zeolites beta m  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a8-160 v953 a<p>The Claisen rearrangement of allyl phenyl ether (APE) to o-allylphenol was investigated over zeolites beta (BEA), mordenite (MOR) and Y (FAU) with different Si/Al ratios. Over the zeolite catalysts, the allylphenol cyclized to produce 2,3-dihydro-2-methyl benzofuran. Larger catalyst loading, higher reaction temperatures and longer run duration favored the formation of the ring compound. Conversion was small over MOR and FAU although they possessed higher acidity (as measured by the temperature programmed desorption of ammonia) compared to BEA. Studies using BEA revealed that the nature of the solvent influenced the reaction rate. The order of reactivity in the solvents was, benzene &gt; EDC (1,2-dichloroethane) &gt; toluene &gt; TCE (1, 1,2,2-tetrachloroethane) &gt;&gt; ACN (acetonitrile). The intermediate allylphenol reacted with the aromatic solvents to produce byproducts when benzene and toluene were used as solvents. A kinetic analysis assuming first order series and parallel reactions is presented. (c) 2006 Elsevier Inc. All rights reserved.</p>10aallyl phenyl ether10aallylphenol10aBenzofuran10aClaisen rearrangement10azeolites1 aWagholikar, S., G.1 aMayadevi, S.1 aJacob, Nalini, E.1 aSivasanker, S.  uhttps://library.ncl.res.in/content/claisen-rearrangement-allyl-phenyl-ether-over-zeolites-beta-mordenite-and-y-001801nas a2200229   4500008004100000022001400041245007700055210006900132260007300201300001200274490000800286520104300294653001301337653001801350653001501368653001101383653001301394100002201407700001701429700001901446856010601465       2006                        eng d  a0926-860X00aLiquid phase alkylation of phenol with 1-octene over large pore zeolites0 aLiquid phase alkylation of phenol with 1octene over large pore z  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL  a106-1140 v3093 a<p>A comparative study is presented of the liquid phase alkylation of phenol with 1-octene over different zeolite catalysts: H-beta (BEA(15)), H-mordenite (MOR(11)) and H-USY (FAU(15)). A wide spectrum of monoalkylated products, identified as isomers of phenyl octyl ether (O-alkylate) and octyl phenol (C-alkylate), was formed in the reaction. The reaction was studied in detail over BEA(15), such studies included the influence of process variables such as temperature, reactant mole ratio, catalyst amount and alkali metal (K) poisoning on its performance in the alkylation reaction. A kinetic analysis of the reaction over BEA(15) was also carried out assuming a second order parallel reaction mechanism. The activity of the different catalysts for the reaction followed the order: BEA(15) &gt; FAU(15) &gt; MOR(11). The poisoning of BEA(15) with potassium resulted in a decrease in the catalyst activity concomitant with a decrease in the number of strong acid centres in the catalyst. (c) 2006 Elsevier B.V. All rights reserved.</p>10a1-octene10aalkyl phenols10aAlkylation10aphenol10azeolites1 aWagholikar, Smita1 aMayadevi, S.1 aSivasanker, S.  uhttps://library.ncl.res.in/content/liquid-phase-alkylation-phenol-1-octene-over-large-pore-zeolites-001818nas a2200253   4500008004100000022001400041245008200055210006900137260007300206300001200279490000800291520098200299653001401281653001201295653001801307653001801325653001801343653001301361100002301374700002201397700001701419700001901436856010901455       2007                        eng d  a0926-860X00aAcylation of anisole with long-chain carboxylic acids over wide pore zeolites0 aAcylation of anisole with longchain carboxylic acids over wide p  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB  a250-2570 v3173 a<p>The acylation of anisole with long-chain carboxylic acids (hexanoic, octanoic and decanoic) has been studied over three large pore zeolites-beta (BEA), faujasite (FAU) and mordenite (MOR). The acylation of anisole with the long chain acids produced mainly the ketone (4-methoxy phenyl alkyl ketone) and small amounts of the ester (phenyl alkanoate). The results revealed the reaction to be influenced by the type of zeolite and its Si/Al ratio (acidity) besides the chain length (carbon number) of the carboxylic acid. In the acylation of anisole with hexanoic acid, the activity of the zeolites increased with dealumination as it led to the generation of mesopores that resulted in a decrease in diffusion resistance of the zeolites. The reactivity of the acids in the acylation reaction was found to decrease with increase in the carbon number. The experimental data have been fitted into a pseudo first order kinetic model. (c) 2006 Elsevier B.V. All rights reserved.</p>10aAcylation10aAnisole10adecanoic acid10ahexanoic acid10aoctanoic acid10azeolites1 aWagholikar, S., G.1 aNiphadkar, P., S.1 aMayadevi, S.1 aSivasanker, S.  uhttps://library.ncl.res.in/content/acylation-anisole-long-chain-carboxylic-acids-over-wide-pore-zeolites