PLANT AND METHOD OF PRODUCING MEDIUM DISTILLATE AND LOWER OLEFINS FROM HYDROCARBON RAW STOCK Russian patent published in 2012 - IPC C10G11/18 C10G3/00 C10G51/06 

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to petrochemical industry. Proposed method comprises the following stages: catalytic cracking of raw gas oil in the zone of vertical reactor of fluidised catalytic cracking (FCC) by bringing in contact said gas oil with first catalyst at 400-600°C to produce product of said vertical reactor. Said product is separated into gas oil cracking product and first used catalyst. It comprises also bringing intermediate reactor raw stock containing, at least, a portion of gas oil cracking product with second catalyst in intermediate cracking reactor at 482-871°C to produce intermediate reactor product containing, at least, one compound of lower olefin and second used catalyst. Besides, it includes separating said intermediate reactor cracking product to produce lower olefin product containing, at least, one compound of said olefin wherein raw stock of intermediate reactor containing, at least, one compound selected from fat acid and fat acid ester.

EFFECT: higher conversion into lower olefins.

11 cl, 2 dwg