METHOD OF PRODUCING ETHYLENE AND PROPYLENE Russian patent published in 2011 - IPC C07C4/06 C07C11/04 C07C11/06 C10G11/05 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing ethylene and propylene using starting material having high concentration of diolefins by bringing hydrocarbon substance containing at least one olefin which contains 4-12 carbon atoms in amount of at least 20 wt % and where the hydrocarbon substance contains at least one diolefin compound containing 3-12 carbon atoms in amount of 1.26-2.5 wt % in terms of the weight of the hydrocarbon substance, into contact with a zeolite-containing moulded catalyst in a reactor for catalytic conversion of at least one olefin containing 4-12 carbon atoms, where the zeolite in the zeolite-containing moulded catalyst satisfies conditions (1), (2), (3) and (4): (1) the zeolite is an intermediate pore size zeolite with pore size from 5 to 6.5 Е, (2) the amount of protons in the zolite is equal to or less than 0.02 mmol per gram of zeolite, (3) the zeolite contains at least one metal selected from a group comprising group IB metals, (4) the zeolite has molar ratio of silicon oxide to aluminium oxide (SiO₂/Al₂O₃) ranging from 800 to 2000.

EFFECT: method enables stable production of ethylene and propylene with high output using raw material which contains diolefin.

7 cl, 3 ex, 4 tbl, 1 dwg