01486nas a2200205   4500008004100000022001400041245007200055210006900127260008900196300001200285490000700297520075600304100001801060700001901078700001901097700001801116700002501134700001501159856010601174       2005                        eng d  a0376-471000aDestructive adsorption of methyl parathion over nanocrystalline MgO0 aDestructive adsorption of methyl parathion over nanocrystalline   aDR K S KRISHNAN MARG, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATIONcFEB  a251-2550 v443 a<p>Destructive adsorption of methyl parathion (MP) has been investigated over few transition metal oxides and alkali earth metal oxides. Performance of alkaline earth oxides have been found to be better than transition metal oxides and best performance has been shown by aerogel method prepared nanocrystalline AP-MgO. The AP-MgO powder has been characterized by XRD, AFM and BET surface area measurements. Destructive adsorption of MP over AP-MgO has been compared with that of activated carbon. Both are found to adsorb methyl parathion effectively. An IR investigation of the surface of treated AP-MgO and activated carbon reveals that activated carbon adsorbs methyl parathion as such in the molecular form and AP-MgO adsorbs it destructively.</p>1 aReddy, V., S.1 aRadheShyam, A.1 aDwivedi, Reena1 aGupta, R., K.1 aChumbhale, Vilas, R.1 aPrasad, R.  uhttps://library.ncl.res.in/content/destructive-adsorption-methyl-parathion-over-nanocrystalline-mgo-001645nas a2200265   4500008004100000022001400041245009000055210006900145260009500214300001000309490000700319520071800326653001701044653001301061653001701074653001801091653003001109653001601139100002501155700002001180700002101200700001801221700002201239856011801261       2005                        eng d  a0263-876200aVapour phase oxidation of acetophenone to benzoic acid over binary oxides of V and Mo0 aVapour phase oxidation of acetophenone to benzoic acid over bina  a165-189 RAILWAY TERRACE, DAVIS BLDG, RUGBY CV21 3HQ, ENGLANDbINST CHEMICAL ENGINEERScJAN  a75-800 v833 a<p>Test data for catalytic oxidation of acetophenone into benzoic acid performed at bench scale with V2O5-MoO3 catalyst in a continuous downflow metal reactor are presented. The process parameters such as temperature and flow rate influence the product distribution. The P2O5, B2O3 and Na2O when used as dopant on V2O5-MoO3 catalyst showed marked influence on activity and selectivity. An acidic catalyst like V2O5-MoO3-P2O5 favours formation of benzoic acid while a basic catalyst like V2O5-MoO3-Na2O favours formation of benzaldehyde. The addition of Na2O into V2O5-MoO3 binary oxides formed new phases (NaVMoO6 and Na2V2Mo3O15), which increased Arrhenius activation energy from 18.24 to 31.35 kcal mol(-1).</p>10aacetophenone10aactivity10abenzoic acid10acarbon oxides10aoxidation of acetophenone10aselectivity1 aChumbhale, Vilas, R.1 aParadhy, S., A.1 aAnilkumar, Mettu1 aKadam, S., T.1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/vapour-phase-oxidation-acetophenone-benzoic-acid-over-binary-oxides-v-and-mo-002094nas a2200265   4500008004100000022001400041245012900055210006900184260008900253300001200342490000700354520110500361653002801466653001701494653003901511100002101550700001901571700001901590700001201609700002101621700002501642700001801667700001501685856012801700       2006                        eng d  a0971-457X00aVapour phase methylation of phenol over nanocrystalline ZnFe(2-x)A1(x)O(4) (x=0, 0.25, 0.5, 0.75 and 1.0) ferrospinel system0 aVapour phase methylation of phenol over nanocrystalline ZnFe2xA1  aDR K S KRISHNAN MARG, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATIONcSEP  a493-4980 v133 a<p>The alkylation ofphenol with methanol was carried out over ZnFe2-xAlxO4 (x = 0, 0.25, 0.5, 0.75 and 1.0) type spinel systems in a Fixed bed, down flow reactor. The influence of Surface acidity, cation distribution in the spinel lattice and various reaction parameters are discussed. A maximum yield of 70.9 and 22.9% with selectivity of 73.5 and 23.3% was obtained for 2,6-xylenol and o-cresol respectively, giving a total ortho selectivity of: 96.8% over ZnFeAlO4 at 350 degrees C, methanol to phenol molar ratio of 5 and WHSV of 0.6 h(-1). Catalyst characterization was made by XRD, Mossbauer spectroscopy, ammonia desorption and BET surface area measurements. Mossbauer spectroscopy reveals isomorphic substitution or Fe 3 by smaller A 13, into the octahedral sites leading to lattice distortion, Unsymmetrical charge distribution and charge transfer from iron to oxygen making it more basic and proton attracting. This helps vertical adsorption ofphenol and formation of 2.6-xylenol. It has been concluded that catalyst acidity plays major role in the reaction as compared to surface area.</p>10aconsecutive methylation10aferrospinels10avertical and horizontal adsorption1 aReddy, Vanga, S.1 aRadheShyam, A.1 aDwivedi, Reena1 aRai, A.1 aAnilkumar, Mettu1 aChumbhale, Vilas, R.1 aAswar, A., S.1 aPrasad, R.  uhttps://library.ncl.res.in/content/vapour-phase-methylation-phenol-over-nanocrystalline-znfe2-xa1xo4-x0-025-05-075-and-10-000543nas a2200133   4500008004100000022001400041245006200055210006200117260009900179300000600278490000700284100002500291856009300316       2010                        eng d  a0972-062600aApplications of zeolites in industrial and other purposes0 aApplications of zeolites in industrial and other purposes  aSECTOR A/80 SCHEME NO 54, VIJAY NAGAR, A B ROAD, INDORE MP, 452 010, INDIAbDR JYOTI GARGcDEC  a30 v141 aChumbhale, Vilas, R.  uhttps://library.ncl.res.in/content/applications-zeolites-industrial-and-other-purposes-001884nas a2200253   4500008004100000022001400041245009800055210006900153260011000222300001000332490000700342520096700349653001701316653001601333653002001349653002201369653001401391100002201405700002501427700001901452700001501471700001801486856012601504       2010                        eng d  a0971-457X00aGas-phase oxidant-free oxidation of cyclohexanol over V2O5-MoO3-M2O (M = Na, K, Cs) catalysts0 aGasphase oxidantfree oxidation of cyclohexanol over V2O5MoO3M2O   aDR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATION-NISCAIRcJAN  a43-490 v173 a<p>Oxidant-free oxidation (dehydrogenation) of cyclohexanol is carried out in a down-flow integral laboratory scale reactor using different alkali doped catalysts. The effect of reaction temperature, contact time (W/F) and doping of alkali metals is studied to check its effect on nature of prominent products of the reaction (cyclohexanone and cyclohexene). At lower temperature the cyclohexanone prevails whereas at higher temperature cyclohexene is observed in prominence. Acid-modified catalysts (with boron and phosphorous) facilitated cyclohexene selectivity whereas alkali modified catalysts facilitated cyclohexanone selectivity. Calcination of sodium modified catalyst at different temperatures under static condition affect characteristic phase intensity and cyclohexanone selectivity. XRD investigation showed formation of different inorganic phases as the characteristic of dopant. Cesium modified catalyst showed better dehydrogenation activity.</p>10aCyclohexanol10adehydration10aDehydrogenation10aElectronegativity10aV2O5-MoO31 aVyawahare, Y., K.1 aChumbhale, Vilas, R.1 aPardhy, S., A.1 aSamuel, V.1 aAswar, A., S.  uhttps://library.ncl.res.in/content/gas-phase-oxidant-free-oxidation-cyclohexanol-over-v2o5-moo3-m2o-m-na-k-cs-catalysts-001350nas a2200253   4500008004100000022001400041245010500055210006900160260005600229300001000285490000700295520048400302653001200786653001600798653001300814653001200827653001800839100002000857700001900877700002200896700002500918700002100943856013200964       2010                        eng d  a1509-811700aKinetics studies and mechanism evolution of the epoxidation of styrene over nanoporous Au doped TS-10 aKinetics studies and mechanism evolution of the epoxidation of s  aSOLIPSKA 14A-1, 02-482 WARSAW, POLANDbVERSITAcJAN  a72-780 v123 a<p>{A kinetic investigation of the slurry phase epoxidation of styrene with hydrogen peroxide has been carried out, for the first time, over nanoporous Au doped TS-1 catalyst, in a batch reactor, in the temperature range of 313-333 K. It was found that product selectivity and the rate of reaction are greatly influenced by concentrations of styrene and hydrogen peroxide. Kinetics studies reveal that the mechanism of the reaction is of the ``Redox'' type. The rate equation</p>10aAu/TS-110aepoxidation10akinetics10astyrene10aStyrene oxide1 aSaxena, Samidha1 aDwivedi, Reena1 aBhadauria, Sheenu1 aChumbhale, Vilas, R.1 aPrasad, Rajendra  uhttps://library.ncl.res.in/content/kinetics-studies-and-mechanism-evolution-epoxidation-styrene-over-nanoporous-au-doped-ts-1-001471nas a2200229   4500008004100000022001400041245006300055210006300118260009300181300001200274490000700286520071000293653001501003653001101018653001601029653001601045653001401061100002601075700002501101700002101126856009401147       2012                        eng d  a0035-393000aAlkylation of benzene to cumene over mor zeolite catalysts0 aAlkylation of benzene to cumene over mor zeolite catalysts  aCALEA 13 SEPTEMBRIE NR 13, SECTOR 5, BUCURESTI 050711, ROMANIAbEDITURA ACAD ROMANEcFEB  a107-1130 v573 a<p>The vapor phase alkylation of benzene to cumene (isopropyl benzene) is studied over MOR (mordenite) type zeolite at different process parameters. The reaction was also studied by adopting different methodologies (pyridine poisoning, passing of moist propylene, alkali dominant mordenite, use of coked catalyst and metal impregnated zeolite) to check the nature of product distribution and the extent of activity and selectivity to alkylated product IPB, DIPB (isopropyl benzene and diisopropyl benzene) and n-PB (n-propyl benzene). It is revealed that the adoption of different methodologies affects the activity and selectivity significantly by suppressing of alkylation / isomerisation reactions.</p>10aAlkylation10acumene10aisopropanol10aMOR zeolite10apropylene1 aVyawahare, Yogesh, K.1 aChumbhale, Vilas, R.1 aAswar, Anand, S.  uhttps://library.ncl.res.in/content/alkylation-benzene-cumene-over-mor-zeolite-catalysts-0