Synthesis of a ceramics acid of tungstated stannia more active than aluminosilicates for the esterification of n-octanoic acid with methanol

A ceramics acid, calcined at temperatures above 1000 °C, was obtained by impregnating metastannic acid with aqueous ammonium metatungstate followed by calcining in air at 1000–1100 °C (5–8 wt% W); its acidity and catalytic activity for decompositions of toluene and ethylbenzene was intermediate between mordenite and silica-alumina, and its stability to water was quite high.