Phthalic Anhydride Market by Process (O-Xylene Catalytic Oxidation and Naphthalene Catalytic Oxidation), Application (Plasticizers, Alkyd Resins, Unsaturated Polyester Resins, and Others) and End-Use Industry (Paints & Coatings, Automotive, Electrical & Electronics, Building & Construction, Agriculture, Marine, and Others): Global Opportunity Analysis and Industry Forecast, 2021-2030