02004nas a2200217   4500008004100000022001400041245010200055210006900157260009800226300001200324490000700336520117300343653004001516653001701556653001101573653002301584653000801607100001901615700002501634856012701659       2006                        eng d  a0959-810300aSilica-supported bis(imino)pyridyl iron(II) catalyst: nature of the support-catalyst interactions0 aSilicasupported bisiminopyridyl ironII catalyst nature of the su  aTHE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLANDbJOHN WILEY & SONS LTDcAUG  a854-8610 v553 a<p>Ethylene polymerizations were performed using silica-supported 2,6-bis[1-(2,6-diisopropylphenylimino) ethyl] pyridine iron(II) dichloride with methylaluminoxane (MAO) as co-catalyst. Silica was calcined at 600, 400 and 200 degrees C under vacuum for 8 h. The effect of calcination temperature of silica on the polymerization activity and the properties of the polymers obtained were examined. Catalyst-support interactions were examined by both a chemical method and XPS. It was observed that upon supporting the catalyst on the surface of silica, there is an increase in the binding energy of the metal center. However, no change in the metal binding energy was observed on supporting the catalyst to silica calcined at different temperatures. Ethylene polymerizations were performed using MAO as co-catalyst. Catalysts were also prepared by first pretreating silica with NIAO, followed by addition of the Fe(II) catalyst and contacting a complex of Fe(II) catalyst-MAO with silica previously calcined at 400 degrees C for 8 h. The results indicate that there is no chemical bonding between the support and the catalyst. (C). 2006 Society of Chemical Industry.</p>10abis(imino) pyridyl iron(II) complex10aPolyethylene10asilica10asupported catalyst10aXPS1 aRay, Saptarshi1 aSivaram, Swaminathan  uhttps://library.ncl.res.in/content/silica-supported-bisiminopyridyl-ironii-catalyst-nature-support-catalyst-interactions-102014nas a2200241   4500008004100000022001400041245012400055210006900179260009800248300001400346490000700360520106600367653002501433653001301458653002501471653002301496100002501519700002501544700002901569700002001598700002501618856012901643       2010                        eng d  a0268-257500aSynthesis of acrolein by gas-phase dehydration of glycerol over silica supported bronsted acidic ionic liquid catalysts0 aSynthesis of acrolein by gasphase dehydration of glycerol over s  aTHE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLANDbJOHN WILEY & SONS LTDcOCT  a1319-13240 v853 a<p>BACKGROUND: Glycerol has become readily available as a byproduct from the biodiesel industry. High functionality and relatively low price make it a potential building block to produce value-added derivatives such as acrolein. RESULTS: Dehydration of glycerol to acrolein was performed over several silica supported Bronsted acidic ionic liquids as catalysts. All the catalysts prepared were active for the synthesis of acrolein (conversion of glycerol was observed in the range 35-90% with selectivity to acrolein in the range 29-58%). CONCLUSIONS: Catalyst prepared from triphenyl (3-sulfopropyl) phosphonium 4-methylbenzenesulfonate gave good activity and selectivity at 4 h reaction time. The conversion of glycerol decreased with increase in glycerol concentration. Higher temperature (325 degrees C) resulted in significantly lower conversion as well as selectivity to acrolein. With the use of two additional traps cooled to -7 degrees C, the selectivity to acrolein increased significantly for good catalysts. (C) 2010 Society of Chemical Industry</p>10aacidic ionic liquids10aacrolein10aglycerol dehydration10asupported catalyst1 aMunshi, Mudassir, K.1 aLomate, Samadhan, T.1 aDeshpande, Raj, Madhukar1 aRane, Vilas, H.1 aKelkar, Ashutosh, A.  uhttps://library.ncl.res.in/content/synthesis-acrolein-gas-phase-dehydration-glycerol-over-silica-supported-bronsted-acidic-0