Method for increasing production of propylene

A production method and propylene technology, which can be used in ethylene production, biological raw materials, hydrocarbon production from oxygen-containing organic compounds, etc., can solve the problem of low carbon-based yield of propylene and so on.

Active Publication Date: 2011-12-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problem that the yield of propylene c

Method used

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  • Method for increasing production of propylene
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Effect test

Embodiment 1

[0022] in such as figure 1 In the shown reaction device, the average temperature of the first fast bed reaction zone is 480°C, the reaction pressure is 0.1MPa in gauge pressure, and the gas linear velocity is 1.5 m / s; the average temperature of the riser reaction zone is 550°C, and the reaction pressure is The gauge pressure is 0.1MPa, the gas linear velocity is 5.0m / s; the average temperature of the second fast bed reaction zone is 470°C, the gauge pressure is 0.1MPa, and the gas linear velocity is 0.8m / s. The carbon deposition amount of the pre-carbon deposition catalyst is 0.5% by weight. The feed at the bottom of the first fast bed reaction zone is pure methanol, the feed is 2 kg / hour, the catalyzer is SAPO-34, and the second raw material is the hydrocarbons above carbon four generated in the product, wherein the mass content of carbon four olefins is 88%, The third raw material is methanol and ethylene, the weight ratio of methanol to ethylene is 0.3:1, and the ethylene ...

Embodiment 2

[0024] According to the conditions described in Example 1, the first fast bed reaction zone average temperature is 440°C, the reaction pressure is 0.2MPa in gauge pressure, and the gas linear velocity is 2.5 m / s; the riser reaction zone average temperature is 650°C, The reaction pressure is 0.2MPa in gauge pressure, the linear velocity of gas is 10.0m / s; the average temperature of the second fast bed reaction zone is 630°C, the reaction pressure is 0.2MPa in gauge pressure, and the linear velocity of gas is 2.0m / sec. The carbon deposition amount of the pre-carbon deposition catalyst is 1.8% by weight. The second raw material is hydrocarbons with carbon four or more, wherein the mass content of carbon four olefins is 91%, the third raw material is methanol and ethylene, and the weight ratio of methanol to ethylene is 0.5:1 to maintain the stability of catalyst flow control, and the reactor outlet product On-line gas chromatographic analysis shows that the carbon-based yield of ...

Embodiment 3

[0026] According to the conditions described in Example 1, the first fast bed reaction zone average temperature is 380°C, the reaction pressure is 0.01MPa in gauge pressure, and the gas linear velocity is 0.8 m / s; the riser reaction zone average temperature is 510°C, The reaction pressure is 0.01MPa in gauge pressure, the linear velocity of gas is 3.0m / s; the average temperature of the second fast bed reaction zone is 450°C, the reaction pressure is 0.01MPa in gauge pressure, and the linear velocity of gas is 1.0m / sec. The carbon deposition amount of the pre-carbon deposition catalyst is 1.2% by weight. The second raw material is hydrocarbons with carbon four or more, wherein the mass content of carbon four olefins is 61%, the third raw material is methanol and ethylene, and the weight ratio of methanol to ethylene is 0.3:1, so as to keep the stability of catalyst flow control, and the reactor outlet product On-line gas chromatographic analysis shows that the carbon-based yiel...

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Abstract

The invention relates to a method for increasing the yield of propylene, and mainly solves the problem that the yield of carbon groups of the propylene is low in the prior art. In the invention, the problem is better solved by the technical scheme that three reaction zones are set, the first fast bed reaction zone is used for preparing olefin through methanol transformation, and the riser reaction zone and the second fast bed reaction zone are connected in series and used for transforming ethylene, hydrocarbons above C4 and unreacted methanol or dimethyl ether; and the technical scheme can be used for the industrial production of low-carbon olefin.

Description

technical field [0001] The invention relates to a method for increasing the production of propylene. technical background [0002] Propylene is an important basic chemical raw material, and its demand is constantly increasing. Generally, propylene is 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 propylene from alternative raw materials. Among them, an important class of alternative raw materials for the production of light olefins are oxygenates, 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. Some oxygenated compounds can already be produced on a large scale, ...

Claims

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Application Information

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IPC IPC(8): C07C11/06C07C1/20C07C4/06
CPCY02P20/584Y02P30/20Y02P30/40
Inventor 齐国祯钟思青俞志楠王莉
Owner CHINA PETROLEUM & CHEM CORP
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