01919nas a2200169   4500008004100000245015000041210006900191260000800260300001200268490000600280520123500286100002201521700002801543700002401571700002201595856013201617       2018                        eng d00aHxZr3-xPW12O40 as an insoluble and reusable heteropolyacid for highly selective dehydration of fructose to 5-hydroxymethyl fufural in DMSO system0 aHxZr3xPW12O40 as an insoluble and reusable heteropolyacid for hi  cJAN  a832-8360 v33 aDehydration of fructose is a way to produce an important platform chemical such as 5-hydroxymethylfurfural (HMF) which is widely used to synthesize variety of renewable chemicals and fuel. Heteropoly acid, H3PW12O40 is highly soluble strong acidic catalyst with well-defined structure. This study reports the modification of soluble heteropoly acid to insoluble and reusable heteropolyacid (HxZr3-xPW12O40 ) by exchanging with Zr and investigation of its catalytic performance in selective transformation of renewable fructose to 5-HMF in Dimethyl sulfoxide (DMSO) system. The physico-chemical properties of H(x)Zr(3-x)PW(12)O(40)were derived from Powder-XRD, NH3-TPAD and FT-IR technique. The characterization of HxZr3-xPW12O40 revealed that the Keggin structure of HPA remained intact as proton replaced by Zr. The partial exchange of Zr in H2Zr1PW12O40 catalyst resulted in an increase in acidity, however further increase of Zr above 1, acidity was found to be decreased. At optimized reaction condition, 5-HMF yield of 85% with 100% selectivity was achieved with H1Zr2 PW12O40 catalyst at much lower reaction time of 10 min than reported. The catalyst was observed to be recoverable, reusable as compared to parent H3PW12O40.1 aMulik, Nagesh, L.1 aNiphadkar, Prashant, S.1 aPandhare, Kiran, V.1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/hxzr3-xpw12o40-insoluble-and-reusable-heteropolyacid-highly-selective-dehydration-fructose-501325nas a2200253   4500008004100000022001400041245015900055210006900214260000800283300001400291490000700305520042200312653000600734653001900740653002500759653002100784653001900805653003400824653001300858100002200871700002800893700002200921856012800943       2020                        eng d  a0922-616800aSynthesis of ethyl furfuryl ether (potential biofuel) by etherification of furfuryl alcohol with ethanol over heterogenized reusable H1Cs2PW12O40 catalyst0 aSynthesis of ethyl furfuryl ether potential biofuel by etherific  cAPR  a2309-23250 v463 a<p>{Ethyl furfuryl ether (EFE) considered as potential biofuel can replace petroleum diesel up to 100%. EFE also has efficient blending properties with biodiesel to improve its cold flow properties. Herein we demonstrate efficient synthesis of EFE by etherification of renewable furfuryl alcohol (FAlc) with ethanol over heterogenized heteropoly acids. Cs-exchanged heterogenized heteropoly acid (H3-xCsxPW12O40</p>
10aB10aetherification10aEthyl furfuryl ether10aFurfuryl alcohol10aH3-xCsxPW12O4010aHeterogenized heteropoly acid10aL ration1 aMulik, Nagesh, L.1 aNiphadkar, Prashant, S.1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/synthesis-ethyl-furfuryl-ether-potential-biofuel-etherification-furfuryl-alcohol-ethanol