Evaluation of a sulfanilic acid based surfactant in crude oil demulsification: an experimental studyGhassem Zargar, Reza Ghol Gheysari, Mohammad Ali Takassi, Alireza Rostami et Amin ZadehnazariOil & Gas Science and Technology - Rev. IFP Energies nouvelles, 73 (2018) 20DOI: https://doi.org/10.2516/ogst/2018016