We offer Sulfuric Acid. Sulfomax Series The conversion of sulfur dioxide to sulfur trioxide is the catalytic step in the production of sulfuric acid. Süd-Chemie’s SulfoMax® (C 116) series of catalysts feature different formulations and innovative shapes, covering all operating conditions in the sulfuric acid process. Whether the preferred outcome is to reduce emission, increase productivity, maximize energy recovery, decrease pressure drop or extend catalyst lifetime, SulfoMax is the product of choice.