METHOD OF PRODUCING LIGHT OLEFINS BY OXYGEN-CONTAINING COMPOUND Russian patent published in 2017 - IPC C07C1/20 C07C11/02 C07C11/04 C07C11/06 

FIELD: chemistry.

SUBSTANCE: method is described, in which a multi-stage, fluidized, dense phase fluidized bed containing k (k≥1) of the secondary carbon pre-precipitation zones and n (n≥1) of the secondary reaction zones, is used as a reactor, and a multi-stage, dense phase fluidized bed regenerator containing m (m≥2) of the secondary regeneration zones, is used as a main equipment. A material flow controller is used, consisting of a separation plate, a hole, a downflow material pipe, a lower reflective plate, and a heat recovery device; the catalyst is fed into the downflow material pipe from the top of the downflow material pipe, in which the apparent linear velocity of the gas is less than or equal to the minimum velocity creating the fluidized bed, wherein the catalyst in the downflow material pipe is in a dense packing state of the solid phase, and the driving force of the material flow is created to transfer the catalyst through the hole to the next secondary carbon pre-deposition zone, or to the next secondary reaction zone, or to the next secondary regeneration zone. By recycling the hydrocarbons with four or more carbon atoms produced in the separation zone, or by adding naphtha, gasoline, petroleum condensate, light diesel oil, hydrogenated oil residue, or kerosene to the reaction zone, the invention primarily solves the problems existing at the current level of technology - the uniformity of the amount of carbon deposition and the carbon concentration on the catalyst that are difficult to control, and the low yield of light olefins.

EFFECT: increasing the yield of light olefins.

14 cl, 5 ex, 5 dwg