02039nas a2200253   4500008004100000022001400041245013200055210006900187260007300256300001200329490000900341520110500350653002701455653001901482653001901501653001901520653001101539100002601550700001301576700001901589700001801608700002801626856013101654       2007                        eng d  a1381-116900aCatalytic performances of silicotungstic acid/zirconia supported SBA-15 in an esterification of benzyl alcohol with acetic acid0 aCatalytic performances of silicotungstic acidzirconia supported   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a150-1570 v276	3 a<p>Liquid phase esterification of benzyl alcohol (BA) to benzyl acetate (Peach fragrance) with an acetic acid (AA) has been investigated with 12-silicotungstic acid supported on zirconia embedded inside SBA-15 (STA/ZrO2/SBA- 15) as the catalyst. Catalysts were unambiguously characterized by XRD, N-2 adsorption-desorption, FF-IR pyridine adsorption techniques and the total amount of acidity of different STA loaded catalysts was estimated by TPD of NH3. The optimization of reaction conditions of an esterification of BA with AA was performed with 15 wt.% STA/22.4 wt.% ZrO2/SBA-15 calcined at 1123 K by varying catalyst concentration (1-10 wt.% of reaction mixture); temperature, 353-383 K and AA:BA molar ratio as 0.5-3. The 15 wt.% STA/22.4 wt.% ZrO2/SBA-15 calcined at 1123 K was found to have the highest acidity and more active in the reaction. Under the optimized reaction conditions, the 15 wt.% STA/22.4 wt.%ZrO2/SBA-15 calcined at 1123 K gave 59% BA conversion with selectivity for benzyl acetate as high as 96% within 2 h of reaction time. (c) 2007 Elsevier B.V. All rights reserved.</p>10a12-silicotungstic acid10aBenzyl acetate10aBenzyl alcohol10aEsterification10aSBA-151 aSawant, Dhanashri, P.1 aVinu, A.1 aJustus, Josena1 aSrinivasu, P.1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/catalytic-performances-silicotungstic-acidzirconia-supported-sba-15-esterification-benzyl-001106nas a2200229   4500008004100000022001400041245010500055210006900160260008600229300001400315490000700329520023100336653001900567653001800586653001900604653002000623653002500643100003200668700002600700700002200726856012800748       2007                        eng d  a0039-791100aNaIO4/LiBr-Mediated direct conversion of benzylic alcohols and aromatic aldehydes to aromatic esters0 aNaIO4LiBrMediated direct conversion of benzylic alcohols and aro  a325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcAUG  a2641-26460 v373 a<p>Aromatic aldehydes or benzylic alcohols are directly converted to the corresponding aromatic esters in high yields on treatment with methanol or ethanol mediated by sodium metaperiodate (NaIO4)/LiBr in an acidic medium.</p>10aaromatic ester10abenazaldehyde10aBenzyl alcohol10aLithium bromide10aSodium metaperiodate1 aShaikh, Tanveer, Mohammad A1 aEmmanuvel, Lourdusamy1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/naio4libr-mediated-direct-conversion-benzylic-alcohols-and-aromatic-aldehydes-aromatic-001496nas a2200217   4500008004100000022001400041245013500055210006900190260007300259300001400332490000700346520064600353653002600999653001701025653001901042653002501061653001401086100002601100700002201126856013001148       2009                        eng d  a1566-736700aMagnesium oxide supported nano-gold: a highly active catalyst for solvent-free oxidation of benzyl alcohol to benzaldehyde by TBHP0 aMagnesium oxide supported nanogold a highly active catalyst for   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL  a1738-17420 v103 a<p>Nano-size gold particles deposited on MgO by the homogeneous deposition- precipitation showed very high catalytic activity with nearly 100% conversion of benzyl alcohol in a short reaction period (0.5 h) and more over showed excellent reusability in the process. Influence of the catalyst support (MgO, CaO, BaO, SrO, Al(2)O(3), Ga(2)O(3) and In(2)O(3)), method of gold deposition, Au loading and catalyst calcination temperature and also that of the reaction conditions (viz. reaction time and temperature) on the benzyl alcohol to benzaldehyde oxidation have been thoroughly investigated. (C) 2009 Elsevier B.V. All rights reserved.</p>10aAlkaline earth oxides10aBenzaldehyde10aBenzyl alcohol10aGr.IIIa metal oxides10aOxidation1 aChoudhary, Vasant, R.1 aDumbre, Deepa, K.  uhttps://library.ncl.res.in/content/magnesium-oxide-supported-nano-gold-highly-active-catalyst-solvent-free-oxidation-benzyl-003557nas a2200253   4500008004100000022001400041245010900055210006900164260007500233300001400308490000700322520266100329653001702990653001903007653001603026653002503042653002403067653001403091653001203105653001803117100002603135700002203161856012003183       2009                        eng d  a1022-552800aSupported nano-gold catalysts for epoxidation of styrene and oxidation of benzyl alcohol to benzaldehyde0 aSupported nanogold catalysts for epoxidation of styrene and oxid  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGER/PLENUM PUBLISHERScNOV  a1677-16870 v523 a<p>Nano-gold particles supported on different alkaline earth oxides (viz. MgO, CaO, BaO and SrO), Gr. IIIa metal oxides (viz. Al(2)O(3), Ga(2)O(3), In(2)O(3) and Tl(2)O(3)), transition metal oxides (viz. TiO(2), Cr(2)O(3), MnO(2), Fe(2)O(3), CoO(x), NiO, CuO, ZnO, Y(2)O(3) and ZrO(2)), rare earth metal oxides (viz. La(2)O(3), Ce(2)O(3), Nd(2)O(3), Sm(2)O(3), Eu(2)O(3), Tb(2)O(3), Er(2)O(3) and Yb(2)O(3)) and U(3)O(8) [all prepared by depositing gold on corresponding metal oxide support by deposition precipitation (DP) and/or homogeneous deposition precipitation (HDP) method] were evaluated for their catalytic performance in the liquid phase epoxidation of styrene by tert-butyl hydroperoxide (TBHP) to styrene oxide and also in the solvent-free benzyl alcohol-to-benzaldehyde oxidation (by molecular oxygen or TBHP) reactions. For the epoxidation, the catalytic performance (styrene oxide yield) of the most promising nano-gold catalysts prepared by the HDP method was in the following order: Au/MgO &gt; Au/Tl(2)O(3) &gt; Au/Yb(2)O(3) &gt; Au/Tb(2)O(3) &gt; Au/CaO (or TiO(2)). However, for the oxidation of benzyl alcohol to benzaldehyde by molecular oxygen, the order of choice for the most promising catalysts (based on benzaldehyde yield) was Au/U(3)O(8) &gt; Au/Al(2)O(3) &gt; Au/ZrO(2) &gt; Au/MgO. Whereas, when TBHP was used as an oxidizing agent for the benzyl alcohol oxidation, the order of choice for the most promising catalysts was Au/U(3)O(8) &gt; Au/MgO &gt; Au/TiO(2) &gt; Au/ZrO(2) &gt; Au/Al(2)O(3). The catalytic performance of a particular supported nano-gold catalyst was thus found to depend on the reaction catalysed by them. Moreover, it is strongly influenced by a number of catalyst parameters, such as the metal oxide support, the method of gold depositon on the support, the gold loading and also on the catalyst calcination temperature. Nano-gold particles-support interactions seem to play an important role in controlling the deposition of gold ( amount of gold deposited and size and morphology of gold particles), formation of different surface gold species (Au(0), Au(1+) and Au(3+)) and electronic properties of gold particles and, consequently, control the catalytic performance (both the activity and selectivity) of the supported nano-gold catalysts in the reactions. The nano-gold catalysts prepared by the HDP method showed much better catalytic performance than those prepared by the DP, coprecipitation or impregnation method; in general, the HDP method provided supported gold catalysts with much higher gold loading and/or smaller size gold particles than that achieved by the DP and other methods.</p>10aBenzaldehyde10aBenzyl alcohol10aepoxidation10aMetal oxide supports10aNano-gold catalysts10aOxidation10astyrene10aStyrene oxide1 aChoudhary, Vasant, R.1 aDumbre, Deepa, K.  uhttps://library.ncl.res.in/content/supported-nano-gold-catalysts-epoxidation-styrene-and-oxidation-benzyl-alcohol-001942nas a2200229   4500008004100000022001400041245013900055210006900194260007300263300001200336490000800348520105400356653002101410653001701431653001901448653001401467653002201481653002901503100002601532700002201558856013201580       2010                        eng d  a0926-860X00aSolvent-free selective oxidation of benzyl alcohol to benzaldehyde by tert-butyl hydroperoxide over U3O8-supported nano-gold catalysts0 aSolventfree selective oxidation of benzyl alcohol to benzaldehyd  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a252-2570 v3753 a<p>Liquid-phase oxidation of benzyl alcohol to benzaldehyde by tertiary butyl hydroperoxide over different uranium oxide supported nano-gold catalysts in the absence of a solvent has been thoroughly investigated. The influences of catalyst parameters [viz, method of gold deposition (impregnation, co-precipitation, deposition-precipitation and homogeneous deposition-precipitation), gold loading (08 wt%) and catalyst calcination temperature (100-900 degrees C)] on the catalyst performance have been investigated. The influence of reaction conditions [viz, reaction time (0-2 h) and temperature (25-94 degrees C)] on the process performance has also been studied. The Au/U3O8 catalyst prepared by the homogeneous deposition-precipitation and calcined at 400 degrees C showed very high activity (100% benzyl alcohol conversion with &gt;85% selectivity for benzaldehyde) in the process for a short reaction period (0.5 h) at 94 degrees C. The catalyst also showed excellent reusability in the process. (C) 2010 Elsevier B.V. All rights reserved.</p>10aAu/U3O8 catalyst10aBenzaldehyde10aBenzyl alcohol10aNano-gold10aPartial oxidation10atert-Butyl hydroperoxide1 aChoudhary, Vasant, R.1 aDumbre, Deepa, K.  uhttps://library.ncl.res.in/content/solvent-free-selective-oxidation-benzyl-alcohol-benzaldehyde-tert-butyl-hydroperoxide-over-002167nas a2200253   4500008004100000022001400041245009900055210006900154260009500223300001200318490000700330520123800337653001601575653001901591653001901610653001601629653002201645653002201667100002901689700002401718700002001742700002201762856012901784       2015                        eng d  a0263-876200aBenzylation of acetic acid to benzyl acetate over highly active and reusable micro/meso-HZSM-50 aBenzylation of acetic acid to benzyl acetate over highly active   a165-189 RAILWAY TERRACE, DAVIS BLDG, RUGBY CV21 3HQ, ENGLANDbINST CHEMICAL ENGINEERScJAN  a584-5900 v933 a<p>Catalytic benzylation of acetic acid (AA) with benzyl alcohol (BA) to benzyl acetate was studied over zeolites viz. H-ZSM-5 (microporous, medium pore), Micro/Meso-HZSM-5 (combination of micro- and meso pore), H-Beta (microporous, large pore) to investigate catalytic activity and selectivity towards benzyl acetate. Micro/Meso-HZSM-5 obtained by desilication post-treatment has been employed as a heterogeneous catalyst for benzylation reaction probably for the first time. Micro/Meso-HZSM-5 was found to be a promising catalyst for benzylation with AA conversion of 94%, selectivity towards benzyl acetate of 95%. The detailed optimization of process parameters such as molar ratio, catalyst loading, reaction temperature and time was also presented. Micro/Meso-HZSM-5 catalyst was observed to be stable for six cycles (1 fresh and 5 recycles). The first order reaction kinetics (R-2 &gt;0.98) indicated that reaction rate constants increased with increasing reaction temperature. The activation energy for benzylation of AA with BA over Micro/Meso-HZSM-5 was obtained to be 15.07 kJ mol(-1), which is far less than the reported. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.</p>10aAcetic acid10aBenzyl acetate10aBenzyl alcohol10aBenzylation10aMicro/Meso-HZSM-510aReaction kinetics1 aNandiwale, Kakasaheb, Y.1 aGalande, Nitish, D.1 aRaut, Sunil, A.1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/benzylation-acetic-acid-benzyl-acetate-over-highly-active-and-reusable-micromeso-hzsm-5-001695nas a2200277   4500008004100000022001400041245008300055210006900138260000800207300001200215490000700227520080500234653001401039653001901053653001801072653002401090653001801114100002201132700002501154700002201179700002901201700002401230700002801254700002301282856011201305       2022                        eng d  a0930-751600aReactive extraction of gluconic acid using trioctylamine in different diluents0 aReactive extraction of gluconic acid using trioctylamine in diff  cMAR  a417-4240 v453 a<p>
	Reactive extraction of gluconic acid (GA) from aqueous solutions was investigated using trioctylamine (TOA) as extractant in the presence of benzyl alcohol (BA) and 1-decanol (DE) as diluents. Physical extraction of GA with pure diluents in the absence of TOA was found to be poor. Reactive extraction with an amine-diluent mixture enhanced the separation process. Higher extraction efficiencies and distribution coefficients were achieved in the presence of BA as compared to DE. Further optimization studies were carried out to determine the synergistic effect of amine/diluent ratio. Loading ratios higher than 0.5 suggested 3:1 complex formation of GA with the amine. A reactive extraction mechanism of GA in TOA was proposed, and the equilibrium complexation constant was determined.</p>
10a1-Decanol10aBenzyl alcohol10aGluconic acid10areactive extraction10aTrioctylamine1 aKakku, Sivasankar1 aGaikwad, Shripal, M.1 aGaikwad, Shashank1 aTaralkar, Suyogkumar, V.1 aBilla, Sarath, Babu1 aChakinala, Anand, Gupta1 aChakinala, Nandana  uhttps://library.ncl.res.in/content/reactive-extraction-gluconic-acid-using-trioctylamine-different-diluents