A new environmentally friendly catalyst, TiSiW_(12)O_(40)/TiO_2 was prepared. Its catalytic activity in esterification of n-butanoic acid and re-butyl alcohol was measured and compared with that of H_3PW_(12) O_(40) or H_2SO_4. TiSiW_(12)O_(40)/TiO_2 showed better catalytic activity than H_3PW_(12)O_(40) or H_2SO_4. The optimum reaction condition was that the molar ratio of alcohol to acid was 1.3:1, the mass ratio of the catalyst used to the reactants was 1.3%, and the reaction time was 1 h. Under these conditions, the yield of ethyl ester is 87%, propyl ester 93% , rc.-butyl ester 97.2%, n-amyl ester 98% , and iso-amyl ester 95% , respectively.

Key words: SILICATE;TUNGSTATE;TITANIUM COMPOUNDS;TITANIUM OXIDE, butyric ester;ESTERIFICATION;CATALYTIC ACTIVITY;ROASTING;BUTANOL