METHOD OF OBTAINING OLEFINS BY THERMAL CRACKING IN STEAM CRACKING FURNACES Russian patent published in 2017 - IPC C10G9/36 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of conversion of hydrocarbon raw materials by thermal cracking of steam with the receipt contains the olefins product flow containing at least ethylene and propylene, with at least partial conversion of the first hydrocarbon source material at least one cracking furnace (1) and the second hydrocarbon source material for at least one second-cracking furnace (2). Method is characterized by the fact that the second hydrocarbon source material make the second cracking furnace (2) in the midst of cracking, which resulted in relation to ethylene, propylene, from 0.85 to 1.6 kg/kg at the exit of the cracking furnaces, and the first hydrocarbon source material make the first cracking furnace (1) in the midst of cracking, which resulted in relation to ethylene, propylene, from 0.25 to 0.85 kg/kg at the exit of the cracking furnaces. The ratio of propylene to ethylene for the second hydrocarbon feedstock is higher than the ratio of propylene to ethylene for the first hydrocarbon feedstock, and the second hydrocarbon feedstock mainly contains hydrocarbons having a maximum number of carbon atoms 5.

EFFECT: method enables to increase the output of propylene.

14 cl, 4 dwg