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

A technology for low-carbon olefins and production equipment, which is applied to the production of hydrocarbons from oxygen-containing organic compounds, ethylene production, and hydrocarbon cracking to produce hydrocarbons, etc. , the effect of increasing the selectivity and reducing the cost of separation

Active Publication Date: 2016-06-15
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 to be solved by the present invention is that there are many by-products and low yield of low-carbon olefins in the prior art, and a new production device for converting oxygen-containing compounds to low-carbon olefins is provided

Method used

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  • Device 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

[0019] in such as figure 1 In the production device shown, the diameter ratio of the fluidized bed reactor zone I and the fluidized bed reactor II zone is 2.0:1, and the height ratio is 1:1; the inlet of the catalyst circulation inclined pipe and the fluidized bed reactor The vertical distance at the bottom of Zone I is 0.1 of the height of Zone I of the entire fluidized bed reactor; the vertical distance between Zone II of the fluidized bed reactor and the inclined pipe connection port of the regenerated catalyst at the bottom of Zone II of the fluidized bed reactor is The height of zone II of the entire fluidized bed reactor is 0.1; the cyclone separators in the settler and regenerator are both two-stage.

[0020] Reaction conditions: the average temperature of fluidized bed reactor zone I is 500°C, the average temperature of fluidized bed reactor zone II is 550°C, the pressure at the top of fluidized bed reactor zone II is 0.10MPa in gauge pressure, fluidized Pure methanol...

Embodiment 2

[0022] According to the conditions described in Example 1, the ratio of the diameter of the fluidized bed reactor zone I to the fluidized bed reactor II zone is 4.0:1, and the ratio of the height is 2:1; The distance in the vertical direction from the bottom of Zone I of the reactor is 0.2 of the height of Zone I of the entire fluidized bed reactor; The distance is 0.4 of the height of zone II of the entire fluidized bed reactor; the cyclone separators in the settler and regenerator are both two stages. The stability of catalyst flow control is maintained, the outlet product of the reactor is analyzed by online gas chromatography, and the carbon-based yield of low-carbon olefins reaches 80.5% by weight.

Embodiment 3

[0024] According to the conditions described in Example 1, the ratio of the diameter of the fluidized bed reactor zone I to the fluidized bed reactor zone II is 3.0:1, and the ratio of the height is 0.5:1; The distance in the vertical direction from the bottom of Zone I of the reactor is 0.1 of the height of Zone I of the entire fluidized bed reactor; The distance is 0.2 of the height of zone II of the entire fluidized bed reactor; the cyclone separators in the settler and the regenerator are all three stages. The stability of catalyst flow control is maintained, and the outlet product of the reactor is analyzed by online gas chromatography, and the carbon-based yield of low-carbon olefins reaches 82.0% by weight.

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Abstract

The present invention relates to a device for preparing low carbon olefins from an oxygen-containing compound by conversion, and mainly solves the problems that byproducts are more and low carbon olefin yield is not high in the prior art. The device for preparing the low carbon olefins from the oxygen-containing compound by conversion includes a fluidized bed reactor I zone (1), a fluidized bed reactor II zone (2), a settling device (3), a regenerator (4), and a degassing heat remover (5); a fluidized bed reactor I zone (1) outlet and a fluidized bed reactor II zone (2) inlet are connected, the settling device (3) is at least provided with two catalyst outlets which are respectively connected with the fluidized bed reactor I zone (1) and the regenerator (4), the regenerator (4) is provided with a catalyst outlet which is connected with the degassing heat remover (5), the degassing heat remover (5) is at least provided with two catalyst outlets which are respectively connected with the fluidized bed reactor II zone (2) and the regenerator (4), and by the technical solution, the problems are well solved, and the method can be used for industrial production of low carbon olefins.

Description

technical field [0001] The invention relates to a production device for converting oxygen-containing compounds into low-carbon olefins. technical background [0002] Low-carbon olefins, namely ethylene and propylene, are two 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 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 fro...

Claims

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Application Information

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IPC IPC(8): C07C11/04C07C11/06C07C1/20C07C4/06
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 王洪涛齐国祯金永明王莉
Owner CHINA PETROLEUM & CHEM CORP
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