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Method for producing low-carbon olefine from methanol

A technology of low-carbon olefins and methanol, which is applied in ethylene production, bulk chemical production, biological raw materials, etc., can solve the problems of low yield of low-carbon olefins and achieve good technical effects

Active Publication Date: 2014-01-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the low yield of low-carbon olefins in the prior art, and a new method for producing low-carbon olefins from methanol is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] On the catalyst continuous reaction regeneration device, the methanol raw material with a purity of 99.5% enters the reaction temperature at 400°C and the bed density at 550 kg / m 3 , The first fluidized bed reaction section with a gas-solid contact time of 10 seconds is in contact with a catalyst with an average carbon deposition mass fraction of 1.5%, and the generated gas phase stream enters the reaction temperature at 520°C and a bed density of 150 kg / m 3 1. The second fluidized bed reaction section with a gas-solid contact time of 6 seconds is in contact with a catalyst with an average carbon deposition mass fraction of 0.01% to generate products including low-carbon olefins. The reaction pressure of the first fluidized bed reaction section and the second fluidized bed reaction section is 0.01Mpa in gauge pressure, and the average carbon deposit mass fraction entering the second fluidized bed reaction section is the catalyst mass flow rate of 0.01% and the The ratio...

Embodiment 2

[0020] According to the conditions and steps described in Example 1, the methanol raw material with a purity of 99.5% enters the reaction temperature at 500°C and the bed density is 200 kg / m 3 , The first fluidized bed reaction section with a gas-solid contact time of 2 seconds is in contact with a catalyst with an average carbon deposition mass fraction of 3.5%, and the generated gas phase stream enters the reaction temperature at 650°C and a bed density of 50 kg / m 3 1. The second fluidized bed reaction section with a gas-solid contact time of 0.5 seconds is in contact with a catalyst with an average carbon deposition mass fraction of 0.5% to generate products including light olefins. The reaction pressure of the first fluidized bed reaction section and the second fluidized bed reaction section is 0.01Mpa in terms of gauge pressure, and the average carbon deposit mass fraction entering the second fluidized bed reaction section is the catalyst mass flow rate of 0.5% and the Th...

Embodiment 3

[0023] According to the conditions and steps described in Example 1, the methanol raw material with a purity of 99.5% enters the reaction temperature at 470°C and a bed density of 300 kg / m 3 , The first fluidized bed reaction section with a gas-solid contact time of 8 seconds is in contact with a catalyst with an average carbon deposition mass fraction of 2%, and the generated gas phase stream enters the reaction temperature at 600°C and a bed density of 100 kg / m 3 1. The second fluidized bed reaction section with a gas-solid contact time of 3 seconds is in contact with a catalyst with an average carbon deposition mass fraction of 0.1% to generate products including low-carbon olefins. The reaction pressure of the first fluidized bed reaction section and the second fluidized bed reaction section is 0.01Mpa in terms of gauge pressure, and the average carbon deposit mass fraction entering the second fluidized bed reaction section is the catalyst mass flow rate of 0.1% and the Th...

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PUM

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Abstract

The invention relates to a method for producing low-carbon olefine from methanol, and mainly solves the problem of low low-carbon olefine yield in the prior art. The technical scheme of the method for producing low-carbon olefine from methanol comprises the following steps: feeding a methanol raw material into a first fluidized bed reaction section under the conditions that the reaction temperature is 400-500 DEG C, the bed density is 200-550 kg / m<3> and the gas-solid contact time is 2-10 seconds, and enabling the methanol raw material to be in contact with a catalyst of which the average carbon deposition mass percent is 1.5-3.5%; and enabling the generated gas-phase product to flow into a second fluidized bed reaction section under the conditions that the reaction temperature is 520-650 DEG C, the bed density is 50-150 kg / m<3> and the gas-solid contact time is 0.5-6 seconds, and enabling the gas-phase product to be in contact with a catalyst of which the average carbon deposition mass percent is 0.01-0.5%, thus generating a product containing low-carbon olefine. Thus, the problem is well solved. The method can be used for industrial production of low-carbon olefine.

Description

technical field [0001] The invention relates to a method for producing light olefins from methanol. Background technique [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 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, natural gas, biomass and oth...

Claims

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Application Information

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IPC IPC(8): C07C11/04C07C11/06C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 齐国祯钟思青张惠明王华文
Owner CHINA PETROLEUM & CHEM CORP