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The present invention discloses an environment-protecting type pyrogenic benzene refining method. Said method adopts extraction rectification technique and precise rectification technique, and its… (More)
The invention relates to a coked crude benzene refining method, including crude benzene pre-treatment, benzene fraction extractive distillation and methyl benzene, dimethyl benzene fraction… (More)
The invention relates to a method for refining coking benzol, consisting of a process of benzol pretreatment and benzene extractive distillation, a hydrofining process of toluol, xylene distillation… (More)