Production of Sulfur Nanocrystal Through Dilution Crystallization

Selecting process conditions for the dilution crystallization of sulfur in ethanol +toluene mixture for production of sulfur Nanocrystals is studied in the present work. The crystallization process is carried out using the anti-solvent technique to obtain sulfur precipitations in solution. Using this process, the sulfur solubility is decreased in toluene as co-solvent. Although the co-solvent and anti-solvent are miserable in any proportion. The solubility curve of sulfur has been measured in ethanol + toluene mixture. Since the purpose is to produce nano particles, we have determined the shape and size of particles by crystals filtration from solution and to do SEM and TEM tests. The feasibility of the proposed scheme and operating conditions are confirmed by experimental studies in a crystallizer at 25 oC constant temperature.