01600nas a2200205   4500008004100000020002200041022001400063245010500077210006900182260009900251300001400350490000800364520082200372100002801194700001101222700001201233700001301245700001201258856012401270       2007                        eng d  a978-0-444-53068-4  a0167-299100aTungstophosphoric acid and zirconia supported on mesoporous silica catalyst in veratrole acetylation0 aTungstophosphoric acid and zirconia supported on mesoporous sili  aSara Burgerhartstraat 25, Po Box 211, 1000 AE Amsterdam, NetherlandsbElsevier Science BVcAUG  a1325-13300 v1703 a<p>Tungstophosphoric acid (TPA) over zirconia dispersed uniformly in mesoporous silica (MS) channels of MCM-41 and MCM-48 was synthesised and tested for its catalytic activity in veratrole acetylation. Catalysts with different TPA loadings (5 to 50 wt.%) on 22.4 wt.% ZrO(2)/MCM-41 and 15 wt.% TPA on different zirconia loadings (10-70 wt.%)/MCM-41 were prepared and calcined at 1123 K. Catalysts were characterised by known techniques. Mesoporous silica supports play an important role in stabilising catalytically active TPA along with tetragonal phase of zirconia. Among the catalysts, 15 wt.% TPA/22.4 wt.% ZrO(2)/MCM-41 calcined at 1123 K was found to have the highest acidity and be at least four times more active than neat 15 wt.% TPA/ZrO(2) in veratrole acetylation to acetoveratrone by acetic anhydride.</p>1 aHalligudi, Shivaraj, B.1 aXu, R.1 aGao, Z.1 aChen, J.1 aYan, W.  uhttps://library.ncl.res.in/content/tungstophosphoric-acid-and-zirconia-supported-mesoporous-silica-catalyst-veratrole-0