Ecovyst Inc. is a U.S.-based specialty materials and catalysts company serving the refining, petrochemical, and broader chemical industries. Headquartered in Malvern, Pennsylvania, it operates manufacturing and service sites in North America and Europe. The company was formerly known as PQ Group Holdings and adopted the Ecovyst name in 2021.
Ecovyst’s operations are centered on two main areas: sulfuric acid services and advanced materials/catalysts. Through its Ecoservices business, the company regenerates spent sulfuric acid from refinery alkylation units and supplies virgin sulfuric acid and related services to industrial customers. Its Advanced Materials & Catalysts activities include silica-based catalyst supports and specialty catalysts, as well as zeolite catalysts produced through Zeolyst International, a long-standing joint venture. Ecovyst’s technologies are used in applications such as fuel refining processes, polymer production, emission control, and a range of industrial and specialty chemical processes.