01869nas a2200145   4500008004100000245015300041210006900194260000800263300001400271490000600285520125600291100002301547700002501570856012801595       2018                        eng d00aEfficient method for synthesis of 2,5-furandicarboxylic acid from 5-hydroxymethylfurfural and fructose using Pd/CC catalyst under aqueous conditions0 aEfficient method for synthesis of 25furandicarboxylic acid from   cMAY  a5766-57710 v63 aPd/CC catalyst was synthesized from readily available biomass-derived D-glucose. The catalyst was characterized using various techniques such as Fourier transform infrared spectroscopy, powder X-ray diffraction, energy dispersive X-ray analysis, scanning electron microscopy, C-13 cross polarization NMR, transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller (BET) surface area analysis. This catalyst showed excellent catalytic activity toward the synthesis of industrially important 2,5-furandicarboxylic acid (FDCA) from 5-hydroxymethylfurfural (HMF) and fructose. The process is simple, efficient, green, and industrially feasible. Oxidation of HMF proceeded in 85% yield, and dehydration of fructose followed by oxidation gave 64% yield of FDCA with 100% purity using Pd/CC catalyst and molecular O-2 as an oxidizing agent under aqueous reaction conditions. The one pot two step procedure is highly efficient for synthesis of FDCA from fructose as it avoids isolation of HMF and requires a single catalyst for two different steps. FDCA finds utility in next-generation bioplastic poly(ethylene 2,5-furandicarboxylate) (PEF), which is a replacement for fossil-fuel-based poly(ethylene terephthalate) (PET).1 aRathod, Pramod, V.1 aJadhav, Vrushali, H.  uhttp://library.ncl.res.in/content/efficient-method-synthesis-25-furandicarboxylic-acid-5-hydroxymethylfurfural-and-fructose01655nas a2200205   4500008004100000022001400041245016300055210006900218260000800287300001400295490000800309520088300317653002401200653001801224653001901242653001301261100002001274700002501294856013001319       2020                        eng d  a1011-372X00aEfficient synthesis of gamma-valerolactone-a potential fuel from biomass derived levulinic acid using catalytic transfer hydrogenation over Hf@CCSO3H catalyst0 aEfficient synthesis of gammavalerolactonea potential fuel from b  cJUL  a2038-20440 v1503 a<p>A new hafnium based carbonaceous catalyst (Hf@CCSO3H) was prepared by simultaneous carbonization and sulfonation of readily available glucose, followed by incorporation of hafnium metal on the surface of catalyst. The catalyst was well characterized using FT-IR, PXRD, EDX, SEM, C-13 CPNMR, XPS and BET analysis. The catalytic activity of Hf@CCSO3H was evaluated for synthesis of gamma-valerolactone-a potential fuel and green solvent. gamma-valerolactone was synthesized from biomass derived levulinic acid by catalytic transfer hydrogenation using 150 wt% of catalyst at 200 celcius for 24 h in isopropanol solvent as a hydrogen donor. 100% conversion of levulinic acid was achieved with an excellent yield of 96% with more than 99% selectivity of gamma-valerolactone as evident from GC analysis. The method developed is simple, efficient and economical. [GRAPHICS] .</p>
10agamma-Valerolactone10aHydrogenation10alevulinic acid10aTransfer1 aJori, Popat, K.1 aJadhav, Vrushali, H.  uhttp://library.ncl.res.in/content/efficient-synthesis-gamma-valerolactone-potential-fuel-biomass-derived-levulinic-acid-using