01631nas a2200193   4500008004100000022001400041245008400055210006900139260007100208300001400279490000700293520090800300100002501208700001601233700002101249700002101270700002901291856011701320       2010                        eng d  a0888-588500aImmobilized palladium nanoparticles catalyzed oxidative carbonylation of amines0 aImmobilized palladium nanoparticles catalyzed oxidative carbonyl  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcFEB  a1027-10320 v493 a<p>Catalytic application of immobilized palladium nanoparticles for synthesis or ureas by oxidative carbonylation of amines has been investigated. This is the first report oil oxidative carbonylation of amines to ureas using immobilized palladium nanoparticles catalyst. The palladium nanoparticles were immobilized on a NaY zeolite support through 3-aminopropyl-trimethoxysilane (APTS) as anchoring agent. The [Pd]-APTS-Y catalyst along with NaI promoter showed high conversion and selectivity to the desired urea products over several amine compounds including ail example of an aliphatic amine precursor even at 333 K. The immobilized catalyst was easily separated and recycled several times without any loss of activity. The role of different solvents, iodide promoters, iodide to Pd ratio, concentration of substrates, and temperature on the overall yield of the reaction was also investigated.</p>1 aDidgikar, Mahesh, R.1 aRoy, Debdut1 aGupte, Sunil, P.1 aJoshi, Sunil, S.1 aChaudhari, Raghunath, V.  uhttp://library.ncl.res.in/content/immobilized-palladium-nanoparticles-catalyzed-oxidative-carbonylation-amines-001292nas a2200157   4500008004100000245016100041210006900202260000800271300001400279490000700293520064000300100002100940700002100961700002100982856013101003       2018                        eng d00aIsobaric vapor-liquid equilibrium data for binary systems of anisole with methyl acetate, ethyl acetate, n-propyl acetate, and isopropyl acetate at 93.9 kPa0 aIsobaric vaporliquid equilibrium data for binary systems of anis  cMAY  a1761-17660 v633 aThe present work reports experimental isobaric vapor-liquid equilibrium data at 93.9 kPa pressure using a dynamic recirculation still for four binary pairs of acetates with anisole. The suitability of the experimental data for modeling was established by performing the Herington area test, Van Ness test, and mean absolute deviation test. Binary interaction parameters necessary for process modeling were derived through the regression of the VLE data for Wilson, NRTL, and UNIQUAC activity coefficient models with a suitable objective function. VLE data in the form of T-x, y plots indicates no formation of azeotropes for all pairs.1 aBhoi, Bharat, R.1 aMali, Nilesh, A.1 aJoshi, Sunil, S.  uhttp://library.ncl.res.in/content/isobaric-vapor-liquid-equilibrium-data-binary-systems-anisole-methyl-acetate-ethyl-acetate-n01848nas a2200217   4500008004100000022001400041245008600055210006900141260000800210300001100218490000800229520110200237653003501339653002601374653003301400653002201433100002001455700002101475700002101496856011301517       2020                        eng d  a0255-270100aIntensified reactive distillation configurations for production of dimethyl ether0 aIntensified reactive distillation configurations for production   cMAR  a1078240 v1493 a<p>The combustion properties of dimethyl ether (DME) are similar to the conventional fuels; hence it is being used as a promising green energy source. The conventional method of DME production by methanol dehydration is highly energy consuming due to the use of a series of distillation columns. In the present study, an energy efficient reactive distillation configuration is proposed for DME production which leads to higher methanol conversion with less energy requirement as compared to reported configurations. The reactive distillation (RD) and dual reaction zone reactive divided wall column (RDWC) were analyzed using steady state ASPEN simulations. Subsequently, all the design parameters were optimized by sensitivity analysis to minimize the Total Annual Cost (TAC) of the configuration. The results showed that the RD column is more energy efficient than RDWC as it requires 10.68 % less TAC. The proposed RD and dual reaction zone RDWC configurations were found to have less specific energy requirements and less cost per kg of DME than any other configuration reported earlier.</p>
10aEnergy efficient configuration10aReactive distillation10aReactive divided wall column10aTotal annual cost1 aGor, Nikhil, K.1 aMali, Nilesh, A.1 aJoshi, Sunil, S.  uhttp://library.ncl.res.in/content/intensified-reactive-distillation-configurations-production-dimethyl-ether