SEARCH Articles Figures Tables 3.5.6- Trichloro-4-chloroformyl phthalic acid anhydride Benzoyl benzoic acid from phthalic anhydride Catalytic Oxidation of o-Xylene to Phthalic Acid Anhydride Cyclic acid anhydrides phthalic anhydride Phthalic Phthalic acid Phthalic acid anhydride, reaction with Phthalic acid anhydrides benzene ring Phthalic acid anhydrides phthalides Phthalic acid anhydrides phthalimides Phthalic anhydride Terephthalic acid from phthalic anhydride