Catalyst regeneration unit for methanol to olefins

Abstract

The invention relates to a device for generating catalyst for use in preparation of olefins from methanol. The catalyst reactivation device mainly solves the problem that a regenerator in the technology of preparing olefins from methanol only can provide a regenerated catalyst with the carbon deposition quantity. The device for generating catalyst for use in preparation of olefins from methanol mainly comprises a first regenerated area 4, a second regenerated area 3, an inclined tube to be regenerated 11, a first regenerated inclined tube 5, a second regenerated inclined tube 7, heating equipment 6, gas-solid separation equipment 8 and a settlement area 9, wherein the upper part of the first regenerated area 4 is connected with the settlement area 9, and the lower part of the first regenerated area 4 is connected with the second regenerated area 3; the gas-solid separation equipment 8 is positioned in the settlement area 9; the inclined tube to be regenerated 11 is connected with the lower part of the first regenerated area 4; the first regenerated inclined tube 5 is connected with the first regenerated area 4; the second regenerated inclined tube 7 is connected with the second regenerated area 3; regenerated medium air inlet pipelines are arranged at bottoms of the first regenerated area 4 and the second regenerated area 3; and a flue gas outlet pipeline 10 is arranged on thetop of the settlement area 9. By the technical scheme, the problem is better solved. The catalyst reactivation device can be used for the industrial production of low-carbon olefins.

Description

technical field [0001] The invention relates to a catalyst regeneration device for methanol to olefin. technical background [0002] Low-carbon olefins, namely ethylene and propylene, are two important basic chemical raw materials, and their demand is increasing. Generally, ethylene and propylene are produced through petroleum routes, but due to the limited supply and high price of petroleum resources, the cost of producing ethylene and propylene from petroleum resources continues to increase. In recent years, people have begun to vigorously develop the technology of converting alternative raw materials into ethylene and propylene. Among them, an important class of alternative raw materials for the production of light olefins are oxygenates, such as alcohols (methanol, ethanol), ethers (dimethyl ether, methyl ethyl ether), esters (dimethyl carbonate, methyl formate Esters), etc., these oxygenated compounds can be converted from coal, natural gas, biomass and other energy s...

AI Technical Summary

Problems solved by technology

In this method, the regenerator is a bubbling bed, and only one stage of regeneration is set up, which has the disadvantage of only providing a regenerated catalyst with a carbon deposition amount.

[0006] As is well known in the art, to efficiently utilize the C4 and above hydrocarbons produced in the methanol-to-olefins process, one of the schemes is to use the methanol-to-olefins catalyst to further convert them into low-carbon olefins, but due to the similarities and differences in the reaction characteristics, the methanol conversion The amount of carbon deposition required is different from the amount of carbon deposition required for the conversion of hydrocarbons above C4. The existing technology only sets one stage of regeneration, and there is a problem that only one regenerated catalyst with a carbon deposition amount can be provided.

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