METHOD OF CATALYTIC CRACKING OF HYDROCARBONS Russian patent published in 2012 - IPC C10G11/18 C10G11/20 

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to catalytic cracking of hydrocarbons at fine catalyst to produce target products. Proposed method comprises preliminary and additional dispersion of fluid stock by steam and spraying it into upward flow of recovered catalyst via slot holes. It comprises also bringing sprayed stock and catalyst in contact in flow-through reactor, separating catalytic cracking products from used catalyst in cyclone separators arranged in separation zone. Further it comprises feeding used catalyst into stripper to separate entrained hydrocarbons by steaming. Note here that preliminary dispersion of fluid stock is executed by treatment of mixed stock flow fed from stock zone coaxially with mixing zone by high-speed jets fed from annular space around mixing zone radially to cross-section of stock flow. Note also that stock flow in mixing zone is preprocessed by high-speed jets of steam fed from said annular zone into stock flow periphery at 50-70° to cross-section radius. Besides, relation of flow rate of steam fed to stock flow periphery to flow rate of steam fed radially to flow cross-section makes 0.1-0.4.

EFFECT: higher selectivity of extraction of coke and dry gas C₁-C₂, increased yield of liquified gas C₃-C₄ and process efficiency.

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