01609nas a2200193   4500008004100000022001400041245014000055210006900195260007100264300001600335490000700351520080300358100002101161700002301182700002801205700002501233700002901258856012801287       2012                        eng d  a0888-588500aSelectivity tuning options in hydrogenation of m-chloronitrobenzene to m-chloroaniline over mono- and bimetallic supported Pt catalysts0 aSelectivity tuning options in hydrogenation of mchloronitrobenze  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcDEC  a15564-155720 v513 a<p>Supported monometallic (Pt, Ni,) and bimetallic (Ni-Pt) catalysts were prepared for the selective liquid phase hydrogenation of m-chlronitrobenzene to m-chloroaniline (m-CAN). It was found that the use of sodium carbonate as an additive substantially reduced the extent of dehydrohalogenation in the case of monometallic, 1% Pt/C catalyst, to give the highest selectivity of 96% to m-CAN. Ni-Pt bimetallic catalyst although showed almost complete selectivity (&gt;99%) to m-chloroaniline; its activity was several fold lower than that of 1% Pt/C Na2CO3 system. However, compared with Ni monometallic catalyst, bimetallic Ni-Pt showed higher activity and selectivity due to the presence of electron rich surface metallic Pt stabilized by Ni having lower ionization potential compared with Pt.</p>1 aMane, Rasika, B.1 aPotdar, Aparna, S.1 aNadgeri, Jayprakash, M.1 aBiradar, Narayan, S.1 aRode, Chandrashekhar, V.  uhttp://library.ncl.res.in/content/selectivity-tuning-options-hydrogenation-m-chloronitrobenzene-m-chloroaniline-over-mono-001666nas a2200157   4500008004100000022001400041245010800055210006900163260011000232300001400342490000700356520096800363100002101331700002901352856012701381       2012                        eng d  a1463-926200aSimultaneous glycerol dehydration and in situ hydrogenolysis over Cu-Al oxide under an inert atmosphere0 aSimultaneous glycerol dehydration and in situ hydrogenolysis ove  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL  a2780-27890 v143 a<p>Among various catalysts screened, the Cu-Al oxide catalyst, prepared by a co-precipitation method, exhibited excellent activity for simultaneous glycerol dehydration and its hydrogenolysis without external hydrogen. Detailed characterization by XRD, XPS, HR-TEM, TPR, etc., showed evidence of Cu2+ in the form of CuO and CuAl2O4, along with Cu-0 and Cu1+ species, which are responsible for their multifunctional roles in glycerol APR, dehydration and hydrogenolysis reactions under inert conditions. This catalyst also presented consistent activity for a duration of 400 h for autogeneous hydrogenolysis of refined glycerol with 36% selectivity to 1,2-propanediol (1,2-PDO). Manipulating the temperature and feed flow rate conditions, meant that the selectivity to acetol and 1,2-PDO could be tailored as desired. Substantial enhancement in 1,2-PDO selectivity (75%) was achieved for an aqueous bio-glycerol feed over the same catalyst for 50 h of testing.</p>1 aMane, Rasika, B.1 aRode, Chandrashekhar, V.  uhttp://library.ncl.res.in/content/simultaneous-glycerol-dehydration-and-situ-hydrogenolysis-over-cu-al-oxide-under-inert-0