The invention discloses a method for preparing alpha-
terpineol by MnO3 / ZrO2
solid super acid prepared by the impregnation method to catalyze
turpentine through
hydration reaction in a WF-4000C
microwave quick-
reaction system. The technological conditions for preparing MnO3 / ZrO2 are as follows: the concentration of an
ammonium molybdate solution is between 0.2 and 2 mol / L; the impregnation temperature is between 50 and 80 DEG C, the impregnation time is between 2 and 5 hours, the
calcination temperature is between 400 and 650 DEG C, and the
calcination time is between 2 and 5 hours. The technological conditions for preparing the alpha-
terpineol through the
hydration reaction of the
turpentine in a
microwave field are as follows: the ratio of the
turpentine to the absolute ethyl
alcohol to water is 1 to 1 to 1-3 (mols); the amount of catalyst is between 2 and 10 percent (weight percent); the
microwave power is between 300 and 500 watts; and the
reaction temperature is between 50 and 90 DEG C, and the reaction time is between 1 and 3 hours. The conversion rate of the turpentine is between 90 and 97 percent, and the yield of the alpha-
terpineol is between 51 and 53 percent; the reaction time is greatly shortened; and the advantages of promotion of the organic
chemical reaction speed by microwaves, reduction of the production cost and
energy conservation are fully revealed. Because the method has the advantages of low-price and easily obtained raw materials, low production cost, simple synthetic technology, superior performance, suitability for industrialized production, etc., the method has strong market competitive strength and promotion and application value.