Method for purification of a bisphenol a dianhydride composition, bisphenol a dianhydride composition, poly(etherimide) derived from the bisphenol a dianhydride composition, and articles prepared therefrom

A method for the purification of a bisphenol A dianhydride composition comprising

• a bisphenol A dianhydride of the formula
• wherein Ra and Rb are each independently a halogen or a monovalent Ci e alkyl group and p and q are each independently an integer of 0 to 4;
• and
• at least one of sodium ions, potassium ions, calcium ions, zinc ions, aluminum ions, titanium ions, iron ions, phosphorus ions, phosphate ions, sulfate ions, chloride ions, nitrate ions, and nitrite ions;
• the method comprising:
• contacting the bisphenol A dianhydride composition with a halogenated solvent to form a solution;
• and
• one or more of:
• filtering the solution to remove ionic species;
• washing the solution with aqueous media to remove ionic species;
• crystallizing bisphenol A dianhydride from the solution to remove ionic species;
• and
• contacting the solution with an adsorbent to remove ionic species.