Koppers Ceasing Phthalic Anhydride Operations at Stickney Facility

Consistent with Strategy to Optimize Business Portfolio and Enhance Free Cash Flow PITTSBURGH, Dec. 5, 2024 /PRNewswire/ — Koppers Inc., a wholly-owned subsidiary of Koppers Holdings Inc. (NYSE: KOP), today announced that the company will discontinue phthalic anhydride production at its…