Study on Synthesis of Terpinyl Acetate Catalyzed by Phosphoric Acid /Ionic Liquid Composite

Three kinds of H3PO4/R mimBF4 composite were first used to catalyze the synthesis of terpinyl acetate. H3PO4/C4mimBF4 and H3PO4/C8mimBF4 have high catalytic activities. Taking H3PO4/C4mimBF4 as the representative, the effects of dosage of H3PO4 catalyst, reaction temperature, molar ratio and reaction time on selectivity of terpinyl acetate were studied. Under the above conditions,mass fraction of unreacted terpineol was only 0.9%,while terpinyl acetate was 86.5% and pinene was 11% in the product. After H3PO4 /C4 mimBF4 was repeatedly used for seven times, the catalytic activity was comparative to the new catalytic system when some H3PO4 was supplemented.