METHOD FOR OBTAINING OLEFIN C-C CARBOHYDRATES Russian patent published in 2017 - IPC C07C5/333 C07C11/06 C07C11/08 C07C11/10 B01J38/30 

FIELD: chemistry.

SUBSTANCE: invention relates to method for producing olefinic C₃-C₅ hydrocarbons by dehydrogenation of the corresponding paraffinic hydrocarbons in fluidized bed of aluminium-chromium catalyst circulating in the system including the reactor, regenerator (13), and reduction-desorption catalytic preparation after the regenerator (13) carried out by treating the catalyst with reducing gas in a countercurrent mode using horizontal sectioning grids (2). The method is characterized in that immediately after regenerator (13), treatment is carried out in directed internal catalyst circulation mode using vertical partition (6) separating fluidized bed into lifting section (14) and pressure section (15), and then in countercurrent mode with at ratio of catalyst residence time in the said modes is 0.3-3.0.

EFFECT: increasing the yields of target product.

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