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Combined reaction apparatus for producing low-carbon olefin

A combined reaction, low-carbon olefin technology, applied in ethylene production, biological raw materials, hydrocarbon cracking to produce hydrocarbons, etc., can solve problems such as low yield of low-carbon olefins

Active Publication Date: 2013-12-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the low yield of low-carbon olefins in the prior art, and a new combined reaction device for producing low-carbon olefins is provided

Method used

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  • Combined reaction apparatus for producing low-carbon olefin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] in such as figure 1 In the shown small-scale reaction regeneration device, the main reaction zone is a fast fluidized bed, and the regenerator is equipped with two-stage regeneration, the first regeneration zone is located on the upper part of the second regeneration zone, and two risers are set in the auxiliary reaction zone, of which the first riser The upper part is located inside the auxiliary settling zone and the stripping section, the second riser is outside the auxiliary settling zone, the regeneration medium is air, and the stripping medium is water vapor. The average reaction temperature in the main reaction zone is 450°C, the reaction pressure is 0.1MPa in gauge pressure, and the gas linear velocity is 1.25 m / s; the average temperature of the first riser reactor is 558°C, and the reaction pressure is 0.1MPa in gauge pressure , the gas linear velocity is 5.0 m / s; the average temperature of the second riser reactor is 550° C., the reaction pressure is 0.1 MPa in ...

Embodiment 2

[0021] According to the conditions described in Example 1, the average reaction temperature in the main reaction zone is 400°C, the reaction pressure is 0.01MPa in gauge pressure, and the gas linear velocity is 2.0 m / s; the average temperature of the first riser reactor is 510°C, The reaction pressure is 0.01MPa in gauge pressure, the linear velocity of gas is 100m / s; the average temperature of the second riser reactor is 500°C, the reaction pressure is 0.01MPa in gauge pressure, and the linear velocity of gas is 10.0m / sec. The bottom feed of the main reaction zone is methanol with a purity of 99.5%, and the feed is 1.74 kg / hour. The catalyst is SAPO-34. The bottom feed of the first riser reactor is mixed carbon four, and the olefin content is 88% (by weight) , the feed rate is 0.24 kg / h, while the bottom feed of the riser reaction zone is added with water vapor as a diluent, the weight ratio of water vapor and mixed carbon four is 1:1, and the bottom feed of the second riser r...

Embodiment 3

[0023] According to the conditions described in Example 1, the average reaction temperature in the main reaction zone is 500°C, the reaction pressure is 0.3MPa in gauge pressure, and the gas linear velocity is 0.8 m / s; the average temperature of the first riser reactor is 650°C, The reaction pressure is 0.3 MPa in gauge pressure, the linear velocity of gas is 3.0 m / s; the average temperature of the second riser reactor is 630°C, the reaction pressure is 0.3 MPa in gauge pressure, and the linear velocity of gas is 3.0 m / s. The bottom feed of the main reaction zone is methanol with a purity of 99.5%, and the feed is 2.96 kg / hour. The catalyst is SAPO-34. The bottom feed of the first riser reactor is mixed carbon four, and the olefin content is 61% (by weight) , the feed rate is 0.67 kg / h, while the bottom feed of the riser reaction zone is added with water vapor as a diluent, the weight ratio of water vapor and mixed carbon four is 1:1, and the bottom feed of the second riser rea...

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Abstract

The invention relates to a combined reaction apparatus for producing low carbon olefin. The apparatus is mainly used for solving a problem in prior arts of low low-carbon olefin yield. According to the invention, a combined reaction apparatus for producing low carbon olefin is adopted. The apparatus mainly comprises a main reaction zone 2, a first riser 13, a second riser 23, a first reclaiming zone 18, a second reclaiming zone 30, an auxiliary sedimentation zone 25, gas-solid separating equipment and catalyst circulating pipes. With the technical schemes, the problem is well solved. Therefore, the apparatus can be applied in industrialized productions of low-carbon olefin.

Description

technical field [0001] The invention relates to a combined reaction device for producing light olefins. technical background [0002] Low-carbon olefins, namely ethylene and propylene, are important basic chemical raw materials, and their demand is 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 propylene from petroleum resources continues to increase. In recent years, people have begun to vigorously develop the technology of converting low-carbon olefins from alternative raw materials. 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, biomass and other energy sources...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/04C07C11/06C07C1/20C07C4/06
CPCY02P30/20Y02P30/40
Inventor 齐国祯钟思青王莉俞志楠
Owner CHINA PETROLEUM & CHEM CORP
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