关键词: 硫, 邻二甲苯, 溶剂法, 重结晶

Abstract: The industrial sulfur was purified in o-xylene solvent from sulfur slag by solvent method.The influences of reaction temperature，reaction time，liquid-solid ratio，dosage of activated carbon，and recrystallization way on the purity and yield of sulfur were investigated.Results showed when sampling with 10 kg raw material of sulfur residue，the operating temperature was 120 ℃，the operating time was 30 min，liquid-solid ratio was 2，activated carbon dosage was 1 kg，and solvent recycled three times，the average yield and purity of elemental sulfur reached 93.98% and 95.51%，respectively.At this point，the scheme of overflow slag was adopted，and the yield and purity of elemental sulfur could reach 91.84% and 99.5%，respectively.

Key words: sulfur, o-xylene, solvent method, recrystallization