The third national conference on gas and petrochemical processes, focuses on the production and diversification of sulfur-based products, the use of sulfur and its products in sulfur industries (chemical, agricultural, engineering, polymer, pharmaceutical, biochemistry, medicine, cosmetics, nanotechnology, and other related industries) ) and economic development and sulfur-based businesses with a view on domestic and foreign markets were held from July 27 for two days at Ferdowsi University of Mashhad.