METHOD FOR THE PRODUCTION OF BUTADIENE FROM ETHANOL, COMPRISING THE PURIFICATION OF A BUTADIENE-RICH EFFLUENT BY MEANS OF EXTRACTIVE DISTILLATION

摘要

The invention relates to a process for producing butadiene from an ethanol feedstock comprising a step of converting ethanol to butadiene, a distillation step, a washing step with water, a butadiene purification step. comprising at least one butene-1 separation section by extractive distillation and a final distillation section fed by the butadiene distillate head, separating a purified butadiene effluent at the top and a bottom butene residue and an effluent treatment stage.