Patent RU-2695656-C2 (RU)
Title: Reactor with a fluidised catalyst bed, a reactor-regenerator unit, a method of producing olefins and a method of producing aromatic hydrocarbons
Inventor: YAN Vejmin
IPC: B01J8/26
Filed: 2015-10-14
Granted: 2019-07-25
Abstract: FIELD: chemistry. 
     SUBSTANCE: invention relates to chemical engineering. Described is a reactor with a fluidised catalyst bed for producing olefins or aromatic hydrocarbons, having an inlet zone located at the bottom, an outlet zone located at the top and a reaction zone located between the inlet and outlet zones, wherein in the reaction zone there is a guide grid having an area with a smaller portion of free section, i.e. with closer channels, located in middle part of guide grid, and area with larger fraction of free section, i.e. with more free channels located along periphery of guide grid and surrounding area with smaller fraction of free section, besides, in outlet zone of reactor with fluidised bed of catalyst is located channel of accelerating gas supply. Described is a reactor-regenerator unit for producing olefins or aromatic hydrocarbons containing said reactor with a fluidised catalyst bed and a separation device and a regenerator connected therewith for catalyst regeneration, wherein: the separation device comprises a preliminary purification separator for primary cleaning of gas from solid particles, which is connected to the outlet zone of the reactor, a vertically located damping reservoir having a lower region in communication with the outlet of solid particles of the preliminary purification separator for collecting catalyst particles, and an upper region communicating with the preliminary purification separator gas outlet and a final purification separator for fine gas purification from solid particles having an inlet in communication with the upper region of the damper capacitance and a solid particle outlet communicating with the lower region of the damper capacitance; regenerator has loading zone located at the top and unloading zone located at the top, wherein loading zone is located lower than lower area of damping capacity, and unloading zone is located higher than inlet zone of reactor; lower area of the damper tank is connected to the regenerator loading zone through the second pipe, and the regenerator unloading zone is connected to the inlet zone of the reactor through the third pipe. Method of producing olefins using the described reactor-regenerator unit wherein the inlet zone of the reactor is located lower than the lower region of the damping capacity of the separation device, and the lower region of the damper tank is connected to the inlet zone of the reactor through the first pipe, is characterized by that: reacting the oxygenate-containing gaseous feed in the presence of a catalyst in the reaction zone of the reactor; obtained product and entrained catalyst particles are directed through outlet zone of reactor to separation device; separation of the catalyst particles entrained therefrom is separated from the product, part of the separated catalyst is fed directly into the inlet zone of the reactor, the rest of the catalyst is regenerated and the regenerated catalyst is fed into the inlet zone of the reactor; and unreclaimed and regenerated catalyst particles are mixed in inlet zone of reactor and mixture of catalyst particles is fed into reaction zone of reactor. Method of producing aromatic hydrocarbons using the described reactor-regenerator unit is characterized by that: in the reaction zone of the reactor, an oxygenate-containing material is converted in the presence of a catalyst; obtained product and entrained catalyst particles are directed through outlet zone of reactor to separation device; separation of entrained catalyst particles is separated in separating device. Catalyst separated from product is regenerated and regenerated catalyst is fed into inlet zone and then into reaction zone of reactor. 
     EFFECT: high uniformity of pressure and uniform distribution of catalyst particles in the reactor, which increases efficiency of the reaction. 
     35 cl, 12 dwg, 1 tbl