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Method for producing low-carbon olefins by converting oxygen-containing compounds

A technology of low-carbon olefins and compounds, which is applied in the field of conversion of oxygen-containing compounds to low-carbon olefins, can solve the problems of uneven mixing of catalysts and low yield of low-carbon olefins, and achieve uniform distribution of catalyst carbon deposits, increase yield, and shrink effect of size

Active Publication Date: 2015-09-09
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 problem of uneven mixing of catalysts in the reaction zone and low yield of low-carbon olefins in the prior art, and a new method for converting oxygen-containing compounds to produce low-carbon olefins is provided

Method used

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  • Method for producing low-carbon olefins by converting oxygen-containing compounds

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Experimental program
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Effect test

Embodiment 1

[0016] in such as figure 1 In the reaction device shown, both the reactor and the regenerator adopt a fast fluidized bed, and the mixer adopts a bubbling bed. The reaction temperature is 450°C, the regeneration temperature is 650°C, the reaction and regeneration pressures are both 0.01MPa by gauge pressure, the raw material is methanol, the regeneration medium is air, the stripping medium and the fluidizing medium of the mixer are both water vapor. Control the amount of coke deposited on the raw catalyst to be about 5.9% (percentage by weight), and the amount of carbon deposited on the regenerated catalyst to be about 0.5% (percentage by weight). The analysis of the carbon content on the catalyst adopts an infrared carbon-sulfur high-speed analyzer. The raw catalyst in the reaction settler is controlled as the first part by mass flow ratio: the second part=20:1, and the regenerated catalyst in the regenerated settler is degassed and then controlled by the mass flow ratio as th...

Embodiment 2

[0018] in such as figure 1 In the reaction device shown, both the reactor and the regenerator adopt a fast fluidized bed, and the mixer adopts a bubbling bed. The reaction temperature is 450°C, the regeneration temperature is 650°C, the reaction and regeneration pressures are both 0.01MPa by gauge pressure, the raw material is methanol, the regeneration medium is air, the stripping medium and the fluidizing medium of the mixer are both water vapor. Control the amount of coke deposited on the raw catalyst to be about 5.9% (percentage by weight), and the amount of carbon deposited on the regenerated catalyst to be about 0.5% (percentage by weight). The analysis of the carbon content on the catalyst adopts an infrared carbon-sulfur high-speed analyzer. The raw catalyst in the reaction settler is controlled as the first part by mass flow ratio: the second part = 50: 1, and the regenerated catalyst in the regenerated settler is degassed and then controlled by the mass flow ratio as...

Embodiment 3

[0020] in such as figure 1In the reaction device shown, both the reactor and the regenerator adopt a fast fluidized bed, and the mixer adopts a bubbling bed. The reaction temperature is 450°C, the regeneration temperature is 650°C, the reaction and regeneration pressures are both 0.01MPa by gauge pressure, the raw material is methanol, the regeneration medium is air, the stripping medium and the fluidizing medium of the mixer are both water vapor. The carbon deposition mass fraction of the ungenerated catalyst is controlled to be about 5.9%, and the carbon deposition mass fraction of the regenerated catalyst is about 0.5%. The carbon content on the catalyst is analyzed by an infrared carbon-sulfur high-speed analyzer. The raw catalyst in the reaction settler is controlled as the first part by mass flow ratio: the second part = 0.1: 1, and the regenerated catalyst in the regenerated settler is controlled as the first part by mass flow ratio after degassing: the second part = 0....

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Abstract

The invention relates to a method for converting oxygenated chemicals to generate low-carbon olefins, and mainly solves problems of undermixing catalysts and low-yield low-carbon olefins in a reaction zone in the prior art. The method for converting the oxygenated chemicals to generate the low-carbon olefins includes that the oxygenated chemicals are contacted with molecular sieve catalysts in a fluidized bed reactor, generated gaseous products with low-carbon olefins flow out of the fluidized bed reactor, and to-be-generated catalysts which are already generated enter into a reaction settler; the to-be-generated catalysts in the reacting settler enter a blender and the reactor after steam stripping, and the catalysts in the blender are divided into two parts after being blended and then enter the reactor and a regenerator; and the catalysts in the regenerator are contacted with a regenerated medium to form regenerated catalysts, and the regenerated catalysts enter a regenerated settler, and the regenerated catalysts are divided into two parts and respectively enter the blender and the reactor after steam stripping. According to the technical scheme, the method solves the problem effectively and is adaptable to industrial manufacture for converting the oxygenated chemicals to generate the low-carbon olefins.

Description

technical field [0001] The invention relates to a method for converting oxygen-containing compounds to produce low-carbon olefins. Background technique [0002] Light olefins, defined here as ethylene and propylene, are two important basic chemical raw materials, and their demand is increasing. Ethylene and propylene are traditionally produced mainly 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 alternative energy conversion technologies, such as the process of converting oxygenates to olefins (OTO). Oxygenates include methanol, ethanol, dimethyl ether, methyl ethyl ether, and dimethyl carbonate. There are many technologies available to produce oxygenates from feedstocks such as coal, natural gas, biomass, etc. For example, methanol can be produced from coal or natural gas, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/04C07C11/06C07C1/20
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 王洪涛齐国祯李晓红金永明
Owner CHINA PETROLEUM & CHEM CORP
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