Application of magnetic superacid catalyst in synthesis of 2-methylanthraquinone

Abstract

A solid acid catalyst was prepared by impregnating trifluoromethanesulfonic acid (TFMSA) onto mesoporous SiO2 coated attapulgite (ATP). 2-(4’ -methyl benzoyl) benzoic acid (T acid) was used as a compound to evaluate the catalytic activity. T acid is an important dye intermediate. The results show that T acid conversion over the catalyst could reach 100% under mild conditions without concentrated sulfuric acid. It proved that the catalyst was stable after 4 cycles. According to multiple analyses, TFMSA was formed on the surface of ATP.