Method for preparing ethylene and propone with oxocompound

A compound and ethylene technology, which is applied in the direction of hydrocarbon production from oxygen-containing organic compounds, ethylene production, organic chemistry, etc., can solve the problem of low yield of ethylene and propylene, poor guarantee of the average carbon deposition level of the catalyst, and insufficient regeneration of the catalyst by carbon burning. Good control and other issues to achieve the effect of improving selectivity

Active Publication Date: 2008-10-08
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 that the yield of ethylene and propylene is low in the prior art, the regeneration degree of the catalyst in the regener

Method used

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  • Method for preparing ethylene and propone with oxocompound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0023] In a small circulating fluidized bed reactor, the flow form of the reverse system is the same as figure 1 same. The regenerator adopts a riser, the lifting gas is air, and the regeneration temperature is 600°C. The average carbon deposition amount of the regenerated catalyst is adjusted by changing the superficial velocity of the gas in the riser regenerator. The reactor adopts a fast fluidized bed, the gas superficial velocity is 1.2 m / s, the reaction temperature is 425°C, pure methanol is fed, and the methanol weight space velocity is 3 hours -1 , the reaction and regeneration pressures are both 0MPa in gauge pressure. The terminator is injected into the gas-solid rapid separation zone 17 from the pipeline 16, the terminator is water, the weight ratio of methanol to the terminator is 20:1, and the feed temperature of the terminator is 100°C. The sampling ports of the regenerated agent and the spent agent are respectively located on the pipeline 13 and the pipeline 8...

Embodiment 5～7

[0027] According to the conditions described in Example 2, only the temperature of the regenerator was changed, and the experimental results are shown in Table 2.

[0028] Table 2

[0029]

Embodiment 8～12

[0031] According to the conditions described in Example 3, only the reactor temperature was changed, and the experimental results are shown in Table 3.

[0032] table 3

[0033]

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Abstract

The invention relates to a method for producing ethylene and propylene by an oxygen compound, which mainly solves the problems of low ethylene and propylene yield, difficult control to the coke burning degree of a regenerator and hard guarantee of the average activity level of a catalyst in a reactor of the prior art. The invention properly solves the problems by adopting the technical proposals that: at least one of methanol and dimethyl enther is taken as a raw material, at least one of water, C2-C5 alcohol,C2-C5 ether, a C4 above hydrocarbon type or C6-C12 arene is selected as a terminator, and the method comprises the following steps that: a) the material firstly enters a reaction zone from the bottom part of a fluidized bed reactor and contacts with a catalyst to generate a stream 1 containing ethylene and propylene; b) the stream 1 contacts with the terminator at the bottom part of a gas-solid rapid separation zone at the upper part of the reaction zone of the fluidized bed reactor to generate an effluent 2 containing ethylene and propylene; c) a gas phase containing ethylene and propylene is discharged from the top part of the reactor after the effluent 2 passes the stream 2 undergoing the gas-solid rapid separation and then is separated by a cyclone separator, and the catalyst under regeneration enters a stripper and then enters the bottom part of a regenerator; and d) the catalyst under regeneration returns to the reaction zone at the lower part of the reactor after the regeneration by the regenerator and the steam stripping by the stripper; wherein the regenerator is a riser, and the method of preparation can be used for the industrial production of ethylene and propylene.

Description

technical field [0001] The invention relates to a method for producing ethylene and propylene from oxygen-containing compounds. Background technique [0002] 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, natural gas, biom...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C11/04C07C11/06
CPCY02P20/584Y02P30/20Y02P30/40
Inventor 齐国祯钟思青刘俊涛王华文
Owner CHINA PETROLEUM & CHEM CORP
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