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Method and equipment for reducing secondary reaction in MTO reaction

A secondary reaction and reaction technology, applied in chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, organic chemistry, etc., can solve problems such as cost increase, and achieve the effect of high low-carbon olefin selectivity and high raw material conversion rate.

Pending Publication Date: 2021-10-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, ethylene and propylene are obtained by cracking petroleum raw materials, 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

Method used

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  • Method and equipment for reducing secondary reaction in MTO reaction
  • Method and equipment for reducing secondary reaction in MTO reaction
  • Method and equipment for reducing secondary reaction in MTO reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Such as figure 1 As shown, the raw material that is mainly methanol enters the fast bed reaction zone 2, contacts with the catalyst comprising silicon aluminum phosphorus molecular sieve, generates the gas phase stream including light olefins, C4 hydrocarbons and the catalyst to be born, and then accelerates through the accelerating tube 10 and is set It is in contact with the arc-shaped baffle 16-1 above the acceleration tube. The arc-shaped baffle has an arc of 120° and is convex. The distance between the highest point of the center of the baffle and the outlet of the acceleration tube is 1 / 8 of the height of the acceleration tube. 56% of the solid catalyst running track changes at 120°C. After the remaining catalyst and gas are separated by the cyclone separator 12, the gas phase stream enters the separation section through the pipeline 14. The catalyst to be raw is divided into at least three parts. The heat extractor 4 returns to the bottom of the fast bed reaction...

Embodiment 2

[0087] Such as figure 2 As shown, the raw material that is mainly methanol enters the fast bed reaction zone 2, contacts with the catalyst comprising silicon aluminum phosphorus molecular sieve, generates the gas phase stream including light olefins, C4 hydrocarbons and the catalyst to be used, and then enters the gas phase after being accelerated by the accelerating tube 10. Solid rapid separation cyclone separator 16-2, 85% of the solid catalyst running track changes at 180°C, after the remaining catalyst and gas are separated by cyclone separator 12, the gas phase stream enters the separation section through pipeline 14, and the raw catalyst is separated at least It is divided into three parts, the first part returns to the bottom of the fast bed reaction zone 2 after being heated by the external heat extractor 4 of the reactor, the second part returns to the fast bed reaction zone through the reactor circulation inclined pipe 6-1, and the third part enters the stripping A...

Embodiment 3

[0090] Such as image 3 As shown, the raw material that is mainly methanol enters the fast bed reaction zone 2, contacts with the catalyst comprising silicon aluminum phosphorus molecular sieve, generates the gas phase stream including light olefins, C4 hydrocarbons and the catalyst to be used, and then enters the gas phase after being accelerated by the accelerating tube 10. Solid rapid separation cyclone separator 16-2, 85% of the solid catalyst running track changes at 180°C, after the remaining catalyst and gas are separated by cyclone separator 12, the gas phase stream enters the separation section through pipeline 14, and the raw catalyst is separated at least It is divided into three parts, the first part returns to the bottom of the fast bed reaction zone 2 after being heated by the external heat extractor 4 of the reactor, the second part returns to the fast bed reaction zone through the overflow pipe 6-2, and the third part enters the stripper 17 After stripping, ent...

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Abstract

The invention relates to a method and equipment for reducing secondary reaction in MTO reaction. The method comprises the following steps: a methanol raw material enters a reaction zone of a fluidized bed reactor and is contacted with a catalyst to generate ethylene and propylene products; wherein, in the fluidized bed reactor, at least 50% by weight of the catalyst undergoes at least one time of a movement trajectory transition at an angle greater than 90 DEG in the direction of movement of a gas phase stream comprising methanol. The method can be used in industrial production of low-carbon olefins.

Description

technical field [0001] The invention relates to a method and equipment for reducing secondary reactions in MTO reactions. Background technique [0002] Ethylene and propylene are two important basic chemical raw materials used as raw materials for the production of many important chemicals and polymers, and their demand is constantly increasing. Generally, ethylene and propylene are obtained by cracking petroleum raw materials, 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 devote themselves to the development of oxygen-containing compounds, especially the technology of methanol replacing petroleum conversion to produce ethylene and propylene. Owing to the wide range of sources of oxygenates and the economics of conversion to light olefins, the process of converting oxygenates to olefins (OTO), especially the process of con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C11/06C07C11/04B01J8/24
CPCC07C1/20B01J8/24B01J2208/00548B01J2208/00769C07C11/06C07C11/04Y02P30/40Y02P30/20
Inventor 齐国祯李晓红王洪涛王艳学
Owner CHINA PETROLEUM & CHEM CORP
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