Method for producing low-carbon olefins

A production method and technology for low-carbon olefins, which are applied in the production field of low-carbon olefins, can solve the problems of poor process economy, single raw material, long process route, etc., and achieve the effects of high olefin selectivity, short process route and good technical effect.

Active Publication Date: 2008-08-13
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 mainly solved by the present invention is the problem of single raw material, long process route and poor process economy existing in the prior art, and a new production method of low-carbon olefins is provided, which is used in the industrial production of low-carbon olefins , which has the advantages of short process route and good technical economy

Method used

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  • Method for producing low-carbon olefins
  • Method for producing low-carbon olefins
  • Method for producing low-carbon olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0019] Mix 2 grams of 20-40 mesh SAPO-34 molecular sieve catalyst with quartz sand of the same particle size, the mixing mass ratio of quartz sand and catalyst is 3:1, and then put it into a φ14 316 stainless steel fixed-bed reactor to ensure that the The particles are in the constant temperature zone of the reactor. The raw material is monochloromethane, which is operated at normal pressure. After passing through the mass flow meter, it is preheated and mixed with diluent (steam) to enter the reactor. The volume ratio of diluent to monochloromethane is 0.1:1, based on the weight of monochloromethane Hourly space velocity WHSV is 1 hour -1 . Products were analyzed by gas chromatography with thermal conductivity detector. The temperature of the constant temperature reaction zone in the reactor was adjusted, and the results of the reaction time of 1 hour were shown in Table 1.

[0020] Table 1

[0021]

Embodiment 6～8

[0023] According to the experimental conditions of Example 3, the reactor pressure was changed while ensuring that the linear velocity in the reactor was the same as in Example 3, and the results of the reaction time of 1 hour were shown in Table 2.

[0024] Table 2

[0025]

Embodiment 9～11

[0027] According to the experimental conditions of Example 3, the weight hourly space velocity WHSV based on monochloromethane was changed, and the reaction time was 1 hour. The results are shown in Table 3.

[0028] table 3

[0029]

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Abstract

The invention relates to a method for preparing lower olefins, which mainly solves problems of the prior art, such as signal material, long process time, high production cost, etc. The invention solves the problems by using halomethane as material, contacting the material with SAPO type molecular screen catalyst in a reactor under conditions that the reaction temperature is 350-600 DEG C, the material weight hourly space velocity is 0.1-100 hour<-1>, and the reaction pressure measured by a surface pressure meter is 0-1 MPa, reacting to generate an effluent containing ethylene and propylene, then separating and obtaining ethylene and propylene, thereby, the invention is useful in industrial production of lower olefins.

Description

technical field [0001] The invention relates to a method for producing low-carbon olefins. technical background [0002] The "low carbon olefins" mentioned in the present invention mainly refer to ethylene and propylene. Ethylene and propylene are two important basic chemical raw materials, and their demand is constantly 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 oxides (especially methanol) to olefins (MTO), that is, methanol is produced from coal or natural gas through synthesis gas, and then low-carbon materials such as ethylene and propylene are produced from methanol. carbon olefins. [0003] MTO technology originated from t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/26C07C11/02B01J29/85
CPCC07C1/26C07C2521/04C07C2529/85Y02P20/52C07C11/06C07C11/04
Inventor 齐国祯钟思青忻晓琦王华文
Owner CHINA PETROLEUM & CHEM CORP
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