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Method for producing low carbon olefin with oxygen compound

A technology for low-carbon olefins and compounds, which is applied in the field of producing low-carbon olefins from oxygen-containing compounds, can solve the problems of uneven mixing of catalysts, low yield of low-carbon olefins, etc. Effect

Active Publication Date: 2015-01-07
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 producing low-carbon olefins from oxygen-containing compounds is provided

Method used

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  • Method for producing low carbon olefin with oxygen compound
  • Method for producing low carbon olefin with oxygen compound
  • Method for producing low carbon olefin with oxygen compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] in such as figure 1 In the shown reaction device, the reactor adopts a fast fluidized bed, the regenerator adopts a turbulent bed, and the mixer adopts a bubbling bed. The reaction temperature is 450°C, the regeneration temperature is 650°C, the reaction and regeneration pressure 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, and the heat is taken The medium and heat exchange medium is water. 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 catalyst in the mixer is controlled by the mass flow ratio meter as the first part: the second part = 10:1, which makes the system run stably and control conveniently. The c...

Embodiment 2～6

[0018] According to the conditions of Example 1, only the mass flow ratio of the two catalysts in the mixer was changed, and the experimental results are shown in Table 1.

[0019] Table 1

[0020]

Embodiment 7～9

[0022] According to the conditions described in Example 1, only the type of molecular sieve catalyst was changed, and the experimental results are shown in Table 2.

[0023] Table 2

[0024]

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Abstract

The invention relates to a method for producing low carbon olefin with an oxygen compound, which mainly solves the problems in the prior art that catalysts in a reaction area are not mixed uniformly and the yield of low carbon olefin is lower. According to the method, a raw material of oxygen compound is contacted with a molecular sieve based catalyst in a fluidized bed reactor so as to generate the olefin containing low carbon and the catalyst to be produced, after gas-solid separation, a gaseous product containing low carbon olefin flows out from the top of the reactor, the catalyst to be produced enters a reaction settler, after steam stripping, the catalyst to be produced enters a mixer so as to be mixed with a reproduced catalyst to be divided into two parts, the first part enters the fluidized bed reactor after heat transfer through a heat exchanger, the second part enters a reproducer, the catalyst is regenerated in the reproducer and then enters a stripper, after steam stripping, the reproduced catalyst enters the mixer. The method better solves the problems and can be used for industrial production of preparation of low carbon olefin through oxygen compound transformation.

Description

technical field [0001] The invention relates to a method for producing light olefins from oxygen-containing compounds. 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 the process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C11/04C07C11/06B01J29/90B01J29/85
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 王洪涛钟思青齐国祯王莉
Owner CHINA PETROLEUM & CHEM CORP
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