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High-efficient regeneration method for preparing low carbon olefins catalyst from oxygen-containing compounds

A high-efficiency regeneration and low-carbon olefin technology, applied in the direction of hydrocarbon production from oxygen-containing organic compounds, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as temperature fluctuations in regenerators, achieve short residence time, and improve carbon-based utilization rate, the effect of low oxygen content

Active Publication Date: 2010-06-09
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 problem that the regenerator temperature fluctuates greatly in the prior art, and a new efficient regeneration method for preparing low-carbon olefin catalysts from oxygen-containing compounds is provided

Method used

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  • High-efficient regeneration method for preparing low carbon olefins catalyst from oxygen-containing compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] exist figure 1 In the small fast fluidized bed regenerator shown, the catalyst is SAPO-34 molecular sieve, the amount of coke deposited on the ungenerated catalyst belt is 4.5% by weight, the regeneration temperature is set at 700°C, the regeneration medium is air, and the degassing medium is nitrogen. The temperature of the regeneration medium is 300°C, the linear velocity of the gas phase in the regeneration zone is 1.3 m / s, the weight ratio of the first part of the catalyst to the second part of the catalyst is 2:1, the temperature of the dense phase of the regeneration and the flow rate of the fluidized medium of the external heat extractor of the regenerator Automatic cascade control is adopted, the fluidization medium of the heat extractor outside the regenerator is nitrogen, the heat exchange medium is water, and the diameter of the high-efficiency regeneration zone is 1 / 6 of the diameter of the regeneration zone. The continuous operation results for three hours s...

Embodiment 2

[0019] exist figure 1 In the small fast fluidized bed regenerator shown, the catalyst is SAPO-34 molecular sieve, the amount of coke deposited on the ungenerated catalyst belt is 1.5% by weight, the regeneration temperature is set at 600°C, the regeneration medium is air, and the degassing medium is nitrogen. The temperature of the regeneration medium is 100°C, the linear velocity of the gas phase in the regeneration zone is 0.8 m / s, the weight ratio of the first part of the catalyst to the second part of the catalyst is 2:1, the temperature of the dense phase of the regeneration and the flow rate of the fluidized medium of the external heat extractor of the regenerator Automatic cascade control is adopted, the fluidization medium of the heat extractor outside the regenerator is nitrogen, the heat exchange medium is water, and the diameter of the high-efficiency regeneration zone is 1 / 4 of the diameter of the regeneration zone. The continuous operation results for three hours s...

Embodiment 3

[0021] exist figure 1 In the small fast fluidized bed regenerator shown, the catalyst is SAPO-34 molecular sieve, the amount of coke deposited on the ungenerated catalyst belt is 0.5% by weight, the regeneration temperature is set at 600°C, the regeneration medium is air, and the degassing medium is nitrogen. The temperature of the regeneration medium is 100°C, the linear velocity of the gas phase in the regeneration zone is 0.8 m / s, the weight ratio of the first part of the catalyst to the second part of the catalyst is 0.8:1, the temperature of the dense phase of the regeneration and the flow rate of the fluidized medium of the heat extractor outside the regenerator Automatic cascade control is adopted, the fluidization medium of the heat extractor outside the regenerator is nitrogen, the heat exchange medium is water, and the diameter of the high-efficiency regeneration zone is 1 / 6 of the diameter of the regeneration zone. The continuous operation results for three hours sho...

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Abstract

The present invention relates to a high-efficiency regenerating method of catalyst for making light olefin from oxygenated chemicals. The method mainly solves the problem in the prior art that the difference between the temperature of a regenerator separating area and a regenerating area is large, and combustion improver which has influence on making the light olefin from the oxygenated chemicalsis required to be added. The method the present invention comprises the steps as follows: firstly, a fast fluidized bed regenerator is provided; secondly, regenerating medium in 100 DEG C to 300 DEG Centers into the regenerating area of the regenerator to be contacted with aluminosilicophosphate molecular sieve generating catalyst to take oxidation reaction to generate a gas phase substance flowand at the same time generate a great deal of heat to be removed out from the regenerating area by a heat remover; thirdly, the gas phase substance flow carries the catalyst and enters into a high-efficiency regenerating area; fourthly, regenerating catalyst which is separated by gas-solid separation is contacted with a degassing medium to be divided into two parts, a first part returns to the bottom of the regenerating area, and a second part returns to a reaction system. The method solves the problem well by a technical proposal with the steps and can be applied in the industrial productionof the light olefin.

Description

technical field [0001] The invention relates to a high-efficiency regeneration method for preparing low-carbon olefin catalysts 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 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 c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/06B01J29/85C07C1/20C07C11/04B01J29/90
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 齐国祯钟思青张惠明王洪涛
Owner CHINA PETROLEUM & CHEM CORP
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