Abstract
Highly active superacids of Mn-, Fe-, and Al-sulfated ZrO2's for the isomerization of butane to isobutane were obtained by exposing zirconia gel to aqueous solutions of 0.05 M MnSO4, 0.25 M FeSO4, and 0.5 M Al2(SO4)3 followed by calcining in air at 700, 600, and 675°C, respectively. The catalysts were much more active than the superacid of sulfated zirconia, the temperature difference to show the same conversion (20%) between the catalysts and sulfated zirconia being 85, 77, and 85°C for the Mn-, Fe-, and Al-catalysts, respectively.
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