Synthesis of Anthraquinone from Phthalic Anhydride with Benzene over Zeolite Catalyst

摘要

The synthesis of anthraquinone(AQ) from phthalic anhydride(PhA) with benzene over acidic type of zeolite. The protonic form of βzeolite modified CeO_2(0.6g/g zeolite) catalyst was the best catalyst: at 523K WHSV=5h~(-1), and benzene/phthalic anhydride(mol)=25. The reaction was proved to be highly selective for anthraquinone(94.25%) over catalyst of H+modified by CeO_2, with small amouts of orthobenzoyl benzoie acid(BBA)(5.75%), which dehydrated to produce anthraquinone. The reaction result suggested that the reaction for the formation anthraqinone from phthalic anhydride with benzene required the catalyst having more medium stronger Broensted acidic sites inβzeolite catalyst channels.