02221nas a2200265   4500008004100000022001400041245011700055210006900172260000800241300001400249490000700263520134800270653001701618653001701635653002001652653001501672653001501687100002801702700002101730700002201751700001601773700002201789700001301811856013101824       2018                        eng d  a1533-488000aCyclohexylation of resorcinol with cyclohexanol catalyzed by tungstophosphoric acid supported zirconia catalysts0 aCyclohexylation of resorcinol with cyclohexanol catalyzed by tun  cAPR  a2986-29920 v183 a<p>We demonstrate a highly active and reusable heterogeneous catalyst system, tungstophosphoric acid (TPA) supported on zirconia (ZrO2), for the cyclohexylation of resorcinol by cyclohexanol to produce value added chemicals such as 2-cyclohexyl resorcinol, 4-cyclohexyl resorcinol and 3-Hydroxy cyclohexyl phenyl ether under liquid phase reaction condition. TPA/ZrO2 catalysts prepared with different TPA loadings (5-30 wt.%) by wet impregnation method and calcined in the temperature range of 650-850 degrees C were characterized by Nitrogen sorption analysis, XRD, FTIR, DTG and DTA, and P-31 MAS NMR spectroscopy. Among the catalysts studied, 15 wt.% TPA/ZrO2 catalyst calcined at 750 degrees C gave the highest conversion of resorcinol (51.2%) with the selectivities for 3-Hydroxy cyclohexyl phenyl ether (53.9%) and 2-cyclohexyl resorcinol and 4-cyclohexyl resorcinol together (46.1%) under optimum reaction conditions. However, the selectivity of the products were controlled by varying the reaction conditions. At higher conversion of resorcinol (78.9%), only C-alkylated products were formed at 200 degrees C with 15 wt.% TPA/ZrO2 catalyst calcined at 750 degrees C. The combination of TPA and ZrO2 coupled with calcination temperature offered an excellent platform for the conversion of resorcinol into O- or C-alkylated products.</p>10a15% TPA/ZrO210aCyclohexanol10aCyclohexylation10aKeggin TPA10aResorcinol1 aBalasubramanian, V., V.1 aDevassay, B., M.1 aHalligudi, S., B.1 aDeepika, R.1 aUmbarakar, S., B.1 aVinu, A.  uhttps://library.ncl.res.in/content/cyclohexylation-resorcinol-cyclohexanol-catalyzed-tungstophosphoric-acid-supported-zirconia