A method for producing low-carbon olefins from oxygen-containing compounds and equipment used therefor

A technology of low-carbon olefins and compounds, which is applied in the field of producing low-carbon olefins from oxygen-containing compounds, can solve the problem of low selectivity of low-carbon olefins, and achieve the effects of narrow residence time distribution, improved uniformity, and low catalyst speed

Active Publication Date: 2017-06-16
中科催化新技术(大连)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is the problem that the selectivity of low-carbon olefins in the prior art is not high, and the purpose is to provide a new method for improving the selectivity of low-carbon olefins

Method used

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  • A method for producing low-carbon olefins from oxygen-containing compounds and equipment used therefor
  • A method for producing low-carbon olefins from oxygen-containing compounds and equipment used therefor
  • A method for producing low-carbon olefins from oxygen-containing compounds and equipment used therefor

Examples

Experimental program
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Embodiment 1

[0059] There are 4 secondary reaction zones in the dense-phase fluidized bed reactor, and 4 secondary regeneration zones in the dense-phase fluidized bed regenerator. The raw materials containing oxygenated compounds enter the dense-phase fluidized bed reactor, and the Catalyst contact of -34 molecular sieve, the gas phase product stream and the raw catalyst generated, the gas phase material and the entrained raw catalyst enter the cyclone separator, the gas phase product stream enters the subsequent separation section through the outlet of the cyclone separator, and the entrained raw catalyst passes through The dipleg of the cyclone separator enters the fourth secondary reaction zone. The regenerated catalyst enters the dense-phase fluidized bed reactor through the stripper and the riser, and passes through the first to fourth secondary reaction zones in sequence. After carbon deposition, the ungenerated catalyst is formed, and the ungenerated catalyst passes through the strip...

Embodiment 2

[0061] Three secondary reaction zones are set in the dense-phase fluidized bed reactor, and two secondary regeneration zones are set in the dense-phase fluidized bed regenerator. Catalyst contact of -34 molecular sieve, the gas phase product stream and the raw catalyst generated, the gas phase material and the entrained raw catalyst enter the cyclone separator, the gas phase product stream enters the subsequent separation section through the outlet of the cyclone separator, and the entrained raw catalyst passes through The dipleg of the cyclone separator enters the third secondary reaction zone. The regenerated catalyst enters the dense-phase fluidized bed reactor through the stripper and the riser, and passes through the first to third secondary reaction zones in sequence. After carbon deposition, the ungenerated catalyst is formed, and the ungenerated catalyst passes through the stripper , The riser enters the dense-phase fluidized bed regenerator, and passes through the fir...

Embodiment 3

[0063] There are 6 secondary reaction zones in the dense-phase fluidized bed reactor, and 5 secondary regeneration zones in the dense-phase fluidized bed regenerator. The raw materials containing oxygenated compounds enter the dense-phase fluidized bed reactor, and the Catalyst contact of -34 molecular sieve, the gas phase product stream and the raw catalyst generated, the gas phase material and the entrained raw catalyst enter the cyclone separator, the gas phase product stream enters the subsequent separation section through the outlet of the cyclone separator, and the entrained raw catalyst passes through The dipleg of the cyclone separator enters the sixth secondary reaction zone. The regenerated catalyst enters the dense-phase fluidized bed reactor through the stripper and the riser, and passes through the first to sixth secondary reaction zones in sequence. After carbon deposition, the ungenerated catalyst is formed, and the ungenerated catalyst passes through the strippe...

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Abstract

The invention relates to a method for preparing light olefins from oxygen-containing compounds and equipment used therefor. More specifically, the present invention provides a method for producing low-carbon olefins from oxygen-containing compounds, using methanol and / or dimethyl ether as the main raw materials, using multi-stage (n≥2) dense-phase fluidized bed reactors and multi-stage ( m≥2) The catalyst regenerator solves the problems in the prior art that it is difficult to control the carbon deposition amount and uniformity of carbon content of the catalyst and the low selectivity of low-carbon olefins.

Description

technical field [0001] The invention relates to a process for preparing low-carbon olefins from oxygen-containing compounds and equipment used therein. 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. The process of methanol conversion to olefins (MTO) has received more and more attention, and has achieved a production scale of one million tons. With the development of the world economy, the demand for low-carbon olefins, especially propylene, is increasing day by day. According to the analysis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C11/02C07C11/04C07C11/06C07C11/08B01J8/26
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 刘中民叶茂张涛何长青王贤高赵银峰
Owner 中科催化新技术(大连)股份有限公司
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