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Method for producing low carbon olefinic hydrocarbon from methanol or dimethyl ether

A technology of low-carbon olefins and dimethyl ether, which is applied in the direction of ethylene production, bulk chemical production, chemical instruments and methods, etc., can solve the problems of low yield of low-carbon olefins, poor control of reactor temperature, etc. High density, small footprint, and reduced circulation

Active Publication Date: 2009-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problems such as low yield of low-carbon olefins and bad control of reactor temperature in the prior art, and a new method for converting methanol or dimethyl ether into low-carbon olefins is provided

Method used

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  • Method for producing low carbon olefinic hydrocarbon from methanol or dimethyl ether
  • Method for producing low carbon olefinic hydrocarbon from methanol or dimethyl ether
  • Method for producing low carbon olefinic hydrocarbon from methanol or dimethyl ether

Examples

Experimental program
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Effect test

Embodiment 1

[0026] exist figure 1 In the small fast fluidized bed reaction device shown, pure methanol is used as raw material, the average temperature of the reaction zone is 500°C, the reaction pressure is 0.1MPa in terms of gauge pressure, the catalyst is SAPO-34, and the average linear velocity of the reaction zone is 1.6 m / s , the average carbon deposit in the reaction zone is 2.0% by weight, and the average density in the reaction zone is 50 kg / m3. The catalyst in the second dense phase stripping zone after stripping and heat extraction is divided into two parts, the first part returns to the bottom of the fast bed reaction zone through the catalyst external circulation pipe in the circulation zone, and the second part passes through the circulation zone The catalyst to be generated in the inclined pipe enters the regenerator, and after being regenerated by burning charcoal, it returns to the fast bed reaction area through the catalyst regeneration inclined pipe in the circulation a...

Embodiment 2

[0028] exist figure 1 In the small fast fluidized bed reaction device shown, pure methanol is used as raw material, the average temperature of the reaction zone is 500°C, the reaction pressure is 0.3MPa in terms of gauge pressure, the catalyst is SAPO-34, and the average superficial velocity of the reaction zone is 0.8m / second, the average carbon deposit in the reaction zone is 1.5% by weight, and the average density in the reaction zone is 120 kg / m3. The catalyst in the second dense phase stripping zone after stripping and heat extraction is divided into two parts, the first part returns to the bottom of the fast bed reaction zone through the catalyst external circulation pipe in the circulation zone, and the second part passes through the circulation zone The catalyst to be generated in the inclined pipe enters the regenerator, and after being regenerated by burning charcoal, it returns to the fast bed reaction area through the catalyst regeneration inclined pipe in the ci...

Embodiment 3

[0030] exist figure 1 In the small fast fluidized bed reaction device shown, pure methanol is used as raw material, the average temperature in the reaction zone is 400°C, the reaction pressure is 0.01MPa in gauge pressure, the catalyst is SAPO-34, and the average superficial velocity in the reaction zone is 0.8m / second, the average carbon deposit in the reaction zone is 1.5% by weight, and the average density in the reaction zone is 120 kg / m3. The catalyst in the second dense phase stripping zone after stripping and heat extraction is divided into two parts, the first part returns to the bottom of the fast bed reaction zone through the catalyst external circulation pipe in the circulation zone, and the second part passes through the circulation zone The catalyst to be generated in the inclined pipe enters the regenerator, and after being regenerated by burning charcoal, it returns to the fast bed reaction area through the catalyst regeneration inclined pipe in the circulatio...

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Abstract

The invention discloses a method for producing light olefins by methanol or dimethyl ether, which mainly solves the problems in the prior art that the yield of the light olefins is low, the temperature of a reactor is difficult to be controlled, and the mixture of catalyst in reaction area is not even. The technical proposal solves the problems and comprises the following steps: a. a fast fluidized bed reactor is provided; b. the raw materials comprising methanol or dimethyl ether are sent into the fast bed reaction area of the reactor and are contacted with the catalyst, and under effective conditions, the raw materials are converted into product logistics comprising ethylene and propylene; c. after the product logistics are separated, most part of the catalyst are sent to the second dense phase stripping area; d. the entrained product logistics are eliminated in a way that the catalyst in the second dense phase stripping area is contacted with stripping medium; e. after the processes of stripping and heat removal, the catalyst is divided into at least two parts, one of the at least two parts is sent back to the bottom of the fast bed reaction area, and the second part is sent to a regenerator. The method can be used for the industrial production of the light olefins.

Description

technical field [0001] The invention relates to a method for producing light olefins from methanol or dimethyl ether. Background technique [0002] Low-carbon olefins, mainly ethylene and propylene, are two important basic chemical raw materials, and their demand is constantly 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 low-carbon olefins is oxygenated compounds, 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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C11/02B01J29/85B01J29/90
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 齐国祯钟思青张惠明金永明
Owner CHINA PETROLEUM & CHEM CORP
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