FIELD: chemistry.
SUBSTANCE: invention relates to a method for producing butadiene from ethanol feedstock containing at least 80 wt% ethanol, comprising at least step A) conversion of ethanol to acetaldehyde, step B) conversion of an ethanol/acetaldehyde mixture to butadiene, step C1) treatment of hydrogen, step D1) extraction of butadiene, step D2) first purification of butadiene, step D3) further purification of butadiene, step E1) treatment of output streams, step E2) removal of impurities and brown oils and stage F) washing with water.
EFFECT: disclosed method allows to increase productivity and reduce emissions.
15 cl, 2 ex, 7 dwg
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