01997nas a2200229   4500008004100000022001400041245012500055210006900180260000800249300001100257490000800268520118700276653001901463653001801482653003301500653002401533653001701557100001801574700001801592700002501610856013201635       2020                        eng d  a0378-382000aMagnetically separable catalyst for condensation of renewable aldehydes and 2-methylfuran to saturated cyclic oxygenates0 aMagnetically separable catalyst for condensation of renewable al  cJAN  a1061910 v1973 a<p>The saturated cyclic ethers produced from biomass derived aldehydes and 2-methylfuran are the potential diesel fuel candidates. The synthesis of saturated cyclic ethers is a two step process which involves acid catalyzed condensation of aldehydes with 2-methylfuran and the subsequent selective furan ring hydrogenation of the condensation products. Here, we designed a novel recyclable magnetic solid acid catalyst such as [Fe3O4@SiO2-Pr-Py-H][2HSO(4)(2-)] and employed for the condensation of 2-methylfuran with formaldehyde as model substrates and reaction parameters were optimized. Under the set reaction conditions, condensation of 2-methylfuran with several other aldehydes were also successfully achieved with very good yields. Further, several supported noble metal catalysts were screened in order to find suitable catalyst system for selective furan ring hydrogenation of condensation products. Among those, 5% Pd/C was found to be very active and selective for furan ring hydrogenation without formation of ring opened products under very low hydrogen pressure at room temperature. Prepared catalysts were thoroughly characterized with sophisticated techniques.</p>
10afuel additives10aHydrogenation10aHydroxyalkylation-alkylation10aMagnetic solid acid10aOrganosilica1 aTarade, Komal1 aShinde, Suhas1 aRode, Chandrashekhar  uhttps://library.ncl.res.in/content/magnetically-separable-catalyst-condensation-renewable-aldehydes-and-2-methylfuran-saturated