METHOD OF GAS SEPARATION DURING CATALYTIC CRACKING OF PETROLEUM DIRECTION Russian patent published in 2013 - IPC C10G7/00 C10G7/02 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to the method of gas separation during catalytic cracking of petroleum direction, which involves the main rectifying column with stillage part and circulation of quenching and removal of residue, which contains at least two circulation spraying devices and at least two steaming-stripping columns, from which distillates being the components of light and heavy gas oil are removed, and which is equipped with a sharp spraying device with outlet of unstable petroleum and fat gas to the gas fractioning part that includes a fractioning absorber having the heat supply to lower part and heat removal in upper part, a petroleum stabiliser having the stabilised agent outlet with partial return as an absorbent for spraying of the fractioning absorber, heat supply to lower part and sharp spraying with reflux outlet, absorber of amine cleaning of reflux from hydrogen sulphide with outlet of saturated amine that is regenerated from hydrogen sulphide in a proper regenerator having the heat supply to the still and outlet of acid gas, a column for separation of cleaned reflux into propane-propylene and butane-butylene fractions, which is equipped with a heater in the stillage part and sharp spraying device. At fractioning and separation of gases of catalytic cracking, heat distribution is optimised between cooled products of stillage residue and circulation sprays and heated flows of the system, which form heat supply to the bottom of the fractioning absorber, the stabilising column, the separation column of propane-propylene and butane-butylene fractions, regenerator of saturated amine, as well as partial heating of initial raw material.

EFFECT: increasing the sampling of propylene and butylenes as merchantable products from propylene and butylenes, which were potentially formed during the cracking process, with simultaneous reduction of power consumption for the process implementation.

3 cl, 2 dwg, 4 tbl, 4 ex