Naphthalene, the fused-ring aromatic hydrocarbon, was first isolated by crystallization from the naphthalene fraction of coal tar which still remains its major source. At present, naphthalene is a high-volume commercial product. Its major portion is consumed to manufacture derivatives used as intermediates in the synthesis of dyes, medicaments, pesticides, stabilizers, and polymers [1, 2]. The most important derivative is phthalic anhydride, of which almost 25% is produced by the oxidation of naphthalene. For example, the manufacture of plasticizers in the United States consumes approximately 50% of phthalic anhydride [3].