公开(公告)号：US20210198108A1

公开(公告)日：2021-07-01

申请号：US16990422

申请日：2020-08-11

申请人： China University of Petroleum (East China)

发明人： Yanzhen WANG ,  Chunmin SONG ,  Hongling DUAN ,  An ZHANG ,  Li GAO

IPC分类号： C01B17/12 ,  C01B17/02

摘要： A method for producing insoluble sulfur, including: heating a sulfur to 200-700° C., quenching it with water, aqueous solution and other solvents, drying and solidifying the resulting substance at 40-80° C. for 3-15 h, to obtain an insoluble sulfur crude product; crushing the crude product in water into particles with a particle size of 50-400 meshes, wherein the water temperature is not higher than 80° C.; pumping the slurry of water and crude product into the upper part of an extraction column, pumping solvent into the lower part thereof; making the water and solvent from the top of the column flow into a separation tank to separate water phase and solvent phase, heating and evaporating the solvent phase to recover solvent and obtain soluble sulfur; heating and evaporating the insoluble sulfur and solvent from the bottom of the column to recover solvent and obtain purified insoluble sulfur.