Phthalic Anhydride

Description

Phthalic Anhydride is made from phthalates or naphthalene.

The most common method
involves the catalytic oxidation of o-xylene with air over a vanadium pentoxide catalyst at high
temperatures. This process yields phthalic anhydride as a major product. Another method
involves the catalytic oxidation of naphthalene with air over a metal oxide catalyst. Both
processes are industrially significant for the production of phthalic anhydride, which is a key
intermediate chemical in the production of various plastics, resins, and other industrial products.

Application:

Phthalic Anhydride (PA) is used for manufacture plasticizers, pigments, dyes and resins.
One major consumer of PA is the phthalate plasticiser industry such as DINP, DOP, DBP etc. PA is used
in the manufacture of unsaturated polyester resins (UPR) that are usually blended with glass fibers to
produce fiberglass-reinforced plastics. PA-based alkyd resins are used in paints and lacquers that go in to
architectural, machinery, furniture, and fixture applications.

Product Information