▎ 摘　　要

NOVELTY - Synthesis method of symmetrical disulfide compound involves (S1) dispersing and dissolving insoluble copper salt and amine auxiliary agent in methanol to obtain a mixed solution, dispersing graphene in methanol to obtain a dispersion liquid, mixing the mixed solution with the dispersion liquid, leaving the obtained precipitate for drying and calcining in an inert gas containing 5±1% of ammonia gas to obtain a copper-based loaded type catalyst. The mol ratio of the insoluble copper salt to amine auxiliary agent is 1:(1-2), and (S2) mixing halide, elemental sulfur, copper-based supported catalyst, acid binding agent and solvent obtained in step (S1), and stirring to react, the molar ratio of the halide, elemental sulfur and acid-binding agent is 1:(1.5-2.5):2, the copper-based supported catalyst is 5-10% of the mass of the halide, after the reaction is completed and carrying out post-processing to obtain the symmetric disulfide compound. USE - The method is used for synthesizing symmetrical disulfide compound. ADVANTAGE - The method is simple and environmentally-friendly, has high yield, and excellent selectivity. DETAILED DESCRIPTION - Synthesis method of symmetrical disulfide compound involves (S1) dispersing and dissolving insoluble copper salt and amine auxiliary agent in methanol to obtain a mixed solution, dispersing graphene in methanol to obtain a dispersion liquid, mixing the mixed solution with the dispersion liquid, leaving the obtained precipitate for drying and calcining is carried out at 400-600℃ for 5±0.5 hours in an inert gas containing 5±1% of ammonia gas to obtain a copper-based loaded type catalyst. The mol ratio of the insoluble copper salt to amine auxiliary agent is 1:(1-2) and the mass ratio of the copper salt to graphene is 1:(50-100), and (S2) mixing halide, elemental sulfur, copper-based supported catalyst, acid binding agent and solvent obtained in step (S1), and stirring to react at 60-100℃ for 6-10 hours, the molar ratio of the halide, elemental sulfur and acid-binding agent is 1:(1.5-2.5):2, the copper-based supported catalyst is 5-10% of the mass of the halide, after the reaction is completed and carrying out post-processing to obtain the symmetric disulfide compound.