The benzene hydrogenation process is to remove the heavy benzene from the coking crude benzene, add the light benzene to hydrogen under the action of a catalyst, and undergo pre-reaction and main reaction at high temperature and high pressure to remove the unsaturated diolefins and monoolefins on the aromatic branch. It becomes saturated hydrocarbon, and then goes through the process of extractive distillation to remove sulfur, nitrogen, oxygen and other impurities to obtain high-purity benzene, toluene, etc. Heavy benzene can be processed into mineral spirits, coumarone resin, industrial naphthalene, methyl naphthalene.
Because methyl naphthalene has a wide range of applications in petrochemicals, medicine, textiles, dyes, etc. Therefore, it is economically feasible to separate and purify methyl naphthalene from heavy benzene and expand its application range.
