METHOD FOR CATALYTIC CONVERSION OF LIGHT OLEFINS Russian patent published in 2011 - IPC C07C11/04 C07C11/06 C07C4/06 C10G11/05 C10G35/04 C10G45/12 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing light olefins, involving bringing starting material - hydrocarbon oil into contact with a conversion catalyst in a catalytic conversion reactor having one or more reaction zones for conducting the reaction, where the starting material in form of hydrocarbon oil undergoes catalytic conversion in the presence of an inhibitor, and reagent vapour which arbitrarily contains the inhibitor is removed from coke deposited on the catalyst, and the desired article, which contains ethylene and propylene, is obtained by separating reagent vapour. The catalyst is separated from coke and restored for reuse in the reactor, where the ratio of the inhibitor to the starting material is 0.001-15 wt %. The inhibitor is a substance capable of producing hydrogen or has reducing capacity or has adsorption capacity on the active centre of acid catalysts and mixtures thereof, where the substance capable of producing hydrogen or containing hydrogen is hydrogen, tetradihydronaphthalene, decalin, dry catalytic cracking gas, dry coke gas and mixtures thereof. The substance with reducing capacity is carbon oxide and the substance with adsorption capacity on the active centre of acid catalysts is methanol, ethyl alcohol, ammonia, pyridine and mixtures thereof.

EFFECT: use of present method enables inhibition of further conversion of light olefins, which increases output of end products.

21 cl, 7 ex, 3 tbl, 2 dwg