Method for preparing low carbon olefin through oxygenated chemicals

A compound and carbon olefin technology, which is applied in the field of producing low-carbon olefins from oxygen-containing compounds, can solve the problems of low yield of low-carbon olefins and the like, and achieve the effect of improving the yield

Inactive Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the low yield of low-carbon olefins existing in the prior art, and a new method for producing low-carbon olefins from oxygen-containing compounds is provided

Method used

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  • Method for preparing low carbon olefin through oxygenated chemicals

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] in such as figure 1In the shown reaction device, methanol with a purity of 99.5% enters the first fluidized bed reaction zone and contacts with the SAPO-34 catalyst. In the fluidized bed reaction zone, the gas phase stream is separated from the catalyst and enters the separation section. The catalyst in the second fluidized bed reaction zone is divided into two parts. In terms of mass fraction, 40% returns to the first fluidized bed reaction zone, and 60% enters the lifting The tube regeneration zone is then lifted to the dense-phase bed regeneration zone to form a regenerated catalyst. The regenerated catalyst is divided into two parts, 20% of which is returned to the first fluidized bed reaction zone, and 80% is returned to the riser regeneration zone after heat extraction. The first fluidized bed reaction zone is a fast bed, and the reaction conditions in the first fluidized bed reaction zone are: the reaction temperature is 400°C, the reaction pressure is 0.01MPa in...

Embodiment 2

[0023] According to the conditions and steps described in Example 1, methanol with a purity of 99.5% enters the first fluidized bed reaction zone, contacts with the SAPO-34 catalyst, and the gas phase flow and catalyst generated are distributed through the top of the first fluidized bed reaction zone The plate enters the second fluidized bed reaction zone, and the gaseous phase stream is separated from the catalyst and enters the separation section. The catalyst in the second fluidized bed reaction zone is divided into two parts. In terms of mass fraction, 80% returns to the first fluidized bed reaction zone. 20% enters the riser regeneration zone, and then is lifted to the dense bed regeneration zone to form a regenerated catalyst. The regenerated catalyst is divided into two parts, 60% returns to the first fluidized bed reaction zone, and 40% returns to the riser for regeneration after heat extraction Area. The reaction conditions in the first fluidized bed reaction zone are...

Embodiment 3

[0026] According to the conditions and steps described in Example 2, the catalyst in the second fluidized bed reaction zone is divided into two parts, in terms of mass fraction, 50% returns to the first fluidized bed reaction zone, and 50% enters the riser regeneration zone, and then It is lifted to the dense-phase bed regeneration zone to form a regenerated catalyst. The regenerated catalyst is divided into two parts, 50% returns to the first fluidized bed reaction zone, and 50% returns to the riser regeneration zone after heat extraction. The reaction conditions in the first fluidized bed reaction zone are: the reaction temperature is 470°C, the reaction pressure is 0.01MPa in gauge pressure, and the gas phase velocity is 1.5 m / s; the reaction conditions in the second fluidized bed reaction zone are: the reaction temperature is 500°C, the reaction pressure is 0.01MPa in terms of gauge pressure, the gas phase velocity is 0.8 m / s, the average carbon deposition mass fraction of ...

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Abstract

The invention relates to a method for preparing low carbon olefin through oxygenated chemicals, which mainly solves the problem that the low carbon olefin is low in yield in the prior art. The method disclosed by the invention comprises the steps that (a) oxygenated chemicals enter a first fluidized bed reaction area so as to be in contact with a catalyst, and a generated gaseous phase material flow and the catalyst enter a second fluidized bed reaction area; (b) the catalyst in the second fluidized bed reaction area is divided into at least two parts, wherein one part of the catalyst returns back to the first fluidized bed reaction area, and the other part of the catalyst enters a lift pipe regeneration area so as to form a regeneration catalyst; (c) the regeneration catalyst is divided into at least two parts, wherein one part of the regeneration catalyst returns back to the first fluidized bed reaction area, and the other part of the regeneration catalyst is cooled down and returns back to a lift pipe regenerator. The method for preparing low carbon olefin through oxygenated chemicals well solves the problem due to the adoption of the technical scheme and can be used in industrial production.

Description

technical field [0001] The invention relates to a method for preparing low-carbon olefins from oxygen-containing compounds. Background technique [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 from coal, natu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C11/06C07C1/20
CPCY02P20/584Y02P30/20Y02P30/40
Inventor 齐国祯张惠明杨远飞王华文
Owner CHINA PETROLEUM & CHEM CORP
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