Method for preparing low carbon olefins from oxygen-containing compound by conversion

A low-carbon olefin and production method technology, which is applied in the direction of hydrocarbon production from oxygen-containing organic compounds, ethylene production, hydrocarbon cracking, etc., can solve the problem of low yield of low-carbon olefins, many by-products of C4 and above hydrocarbons, etc. problems, achieve the effect of reducing separation cost, reducing the generation of by-products, and reducing energy supply

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the yield of low-carbon olefins in the prior art is not high, and there are many by-products of C4 and above hydrocarbons, and a new production method for converting oxygen-containing compounds to low-carbon olefins is provided

Method used

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  • Method for preparing low carbon olefins from oxygen-containing compound by conversion
  • Method for preparing low carbon olefins from oxygen-containing compound by conversion
  • Method for preparing low carbon olefins from oxygen-containing compound by conversion

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Experimental program
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Effect test

Embodiment 1

[0018] in such as figure 1 In the reaction device shown, the fluidized bed reactor adopts a fast fluidized bed, the catalyst adopts SAPO-34, the reaction temperature is 500°C, the reaction pressure is 0.1MPa in gauge pressure, and the gas linear velocity in the reactor is 1.5m / s; tube side of the prereactor is filled with γ-Al 2 o 3 / SiO 2 Catalyst, the raw material is methanol, the raw material inlet temperature is 120°C, the reaction pressure is 0.4MPa in gauge pressure, and the weight hourly space velocity is 4h -1 ; The tube side of the fixed bed reactor is filled with ZSM-5 catalyst, carbon four and above hydrocarbons (C4 + ) mixed feed (the stock material comes from the mixed hydrocarbon cycle of the MTO product gas separation system), the reactor inlet temperature is 600 ° C, the reaction pressure is 0.15 MPa in gauge pressure, C4 + The weight hourly space velocity is 4h -1 . The regenerator adopts a turbulent flow bed, the regeneration medium is air, the regener...

Embodiment 2～5

[0020] According to the conditions described in Example 1, only the reaction temperature of the fluidized bed reactor was changed, and the experimental results are shown in Table 1.

[0021] Table 1

[0022]

Embodiment 6～7

[0024] According to the conditions described in Example 1, only the reaction pressure of the fluidized bed reactor was changed, and the experimental results are shown in Table 2.

[0025] Table 2

[0026]

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Abstract

The present invention relates to a method for preparing low carbon olefins from an oxygen-containing compound, and mainly solves the problems that low carbon olefin yield is not high, art byproducts of hydrocarbons with four or more than four C atoms are more in the prior art. According to the method for preparing the low carbon olefins from one oxygen-containing compound, a product produced by contact of the oxygen-containing compound with a catalyst I in a prereactor enters into a fluidized bed reactor, and contacts with a molecular sieve based catalyst II to produce a product stream containing the low carbon olefins, after heat transfer with the prereactor, the product stream enters into a product separation system, a to-be-regenerated catalyst in a settler is divided into two parts to enter into a fluidized bed reactor and a regenerator, the regenerated catalyst is degassed by a stripper, then enters into a fluidized bed reactor, hydrocarbons with four or more than four C atoms are contacted with a catalyst III in a fixed bed reactor, the produced product stream containing the low carbon olefins enters into the settler, and by the technical schemes, the problem are well solved, and the method can be used for industrial production of preparing of the low carbon olefins from the oxygen-containing compound by conversion.

Description

technical field [0001] The invention relates to a production method for preparing low-carbon 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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C4/06C07C11/04C07C11/06
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 王洪涛齐国祯俞志楠王菊
Owner CHINA PETROLEUM & CHEM CORP
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