Polycyclic aromatic carbon based solid strong acid

A solid strong acid catalyst comprising, a solid acid, which is insoluble in a polar solvent, obtained by heat treating of polycyclic aromatic hydrocarbons in concentrated sulfuric acid or fuming sulfuric acid to thereby to concentrate and sulfonate said polycyclic aromatic hydrocarbons wherein temperature T for heat treatment is 200° C.≦T≦450° C.

A composite solid strong acid comprising, a solid acid and a carbon material, wherein said solid acid is obtained by heat treating of polycyclic aromatic hydrocarbons to which the carbon material is blended in concentrated sulfuric acid or fuming sulfuric acid, transforming said polycyclic aromatic hydrocarbons to a solid acid which is insoluble in a polar solvent by condensation and sulfonation further compositing with said carbon material wherein temperature T for heat treatment is 200° C.≦T≦450° C.

A composite solid strong acid comprising, a solid acid and a carbon material, wherein said solid acid is obtained by heat treating of polycyclic aromatic hydrocarbons to which the carbon material is blended in concentrated sulfuric acid or fuming sulfuric acid, transforming said polycyclic aromatic hydrocarbons to a solid acid which is insoluble in a polar solvent by condensation and sulfonation further compositing with said carbon material, wherein the carbon material is at least one selected from the group consisting of carbon black, acetylene black, activated carbon, carbon nano tube or fullerene.