METHOD OF PRODUCING BUTADIENE BY CONVERTING ETHANOL (VERSIONS) Russian patent published in 2014 - IPC C07C11/167 C07C1/20 

FIELD: chemistry.

SUBSTANCE: starting ethanol, which is fed to the synthesis step, contains acetaldehyde and/or water in amount of not more than 50 wt %; the catalyst further contains a calcium and/or strontium compound, with the following content of components, with respect to oxides, wt %: magnesium oxide 47-76, aluminium oxide 4.5-12.5, zinc oxide 0.1-1.5, calcium oxide and/or strontium oxide 1.5-7.5, silicon dioxide - the balance. Synthesis is carried out on a fixed granular catalyst bed.

EFFECT: method provides technological flexibility of the process, high conversion of ethanol and butadiene selectivity and prolongs the synthesis process or enables to carry out the process continuously.

7 cl, 1 tbl, 10 ex