FLUIDIZED BED REACTOR, DEVICE AND METHOD FOR PRODUCING LOW-CARBON OLEFINS FROM OXYGEN-CONTAINING COMPOUND Russian patent published in 2023 - IPC B01J8/24 B01J8/26 B01J29/90 C07C1/20 C07C11/02 

FIELD: chemical technology.

SUBSTANCE: fluidized bed reactor, a device, and a method for producing low-carbon olefins from an oxygen-containing compound. A fluidized bed reactor for producing low-carbon olefins from an oxygen-containing compound is described, comprising a reactor shell, a reaction zone, a coke control zone, and a feed pipe. The reactor shell contains a lower shell and an upper shell, the lower shell encloses the reaction zone, the feed pipe is located above the reaction zone and communicates with the reaction zone, the outer periphery of the feed pipe is equipped with an upper shell, the upper shell encloses the feed pipe to form a cavity containing a coke control zone. The upper part of the supply pipe is equipped with a gas outlet. The reaction zone includes an inlet for the reaction feed and an inlet for the coke-driven catalyst. The coke control zone includes a catalyst inlet, an outlet for the coke-controlled catalyst, a gas outlet for coke control, and a feed inlet for coke control. The coke control zone is an annular cavity; n partitions are located in the coke control zone, and these n partitions divide the coke control zone into n coke control sub-zones, which contain the first coke control sub-zone, the second coke control sub-zone and the n-th coke control sub-zone. Each of the n-1 partitions is provided with at least one catalyst circulation hole such that the catalyst flows in an annular shape in the coke control zone, where n is an integer; and a catalyst inlet is located in the first coke control subzone, an outlet for the coke control catalyst is located in the n-th coke control subzone, and a coke control gas outlet is located between two adjacent partitions. An unit for production of low-carbon olefins from an oxygen-containing compound comprises the fluidized bed reactor described above and a fluidized bed regenerator, wherein the fluidized bed reactor is in communication with the fluidized bed regenerator. Also described is a method for producing low carbon olefins from an oxygen-containing compound using the fluidized bed reactor described above.

EFFECT: ability to control activity of the DMTO catalyst, improved performance of the DMTO catalyst, and improve selectivity for low-carbon olefins.

10 cl, 2 dwg, 4 ex