Ecovyst Inc. offers virgin and regenerated sulfuric acid products and services in the United States and internationally. It offers end-to-end logistics for production of alkylate for refineries mining, water treatment, and industrial applications. The company was formerly known as PQ Group Holdings Inc. and changed its name to Ecovyst Inc. in August 2021. Ecovyst Inc. was founded in 1831 and is headquartered in Wayne, Pennsylvania.