Advanced Refining Technologies, LLC (ART), a joint venture of Chevron and Grace, is the leader in hydroprocessing catalysts for cleaner fuels. ART Hydroprocessing™ products and services combine state-of-the-art R&D, refinery knowhow, and process technology from Chevron with world-class catalysts manufacturing and technical support from Grace, to partner with customers to deliver value in refinery operations around the world.