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Reaction device for preparing low-carbon olefin by employing methyl alcohol and/or dimethyl ether

A reaction device and a technology for low-carbon olefins, which are applied in the field of reaction devices, can solve the problem of low selectivity of low-carbon olefins, and achieve the effects of narrow residence time distribution, convenience for large-scale, and improved selectivity.

Active Publication Date: 2015-06-03
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 of low selectivity of low-carbon olefins in the prior art, and a new reaction device for improving the selectivity of low-carbon olefins is provided

Method used

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  • Reaction device for preparing low-carbon olefin by employing methyl alcohol and/or dimethyl ether
  • Reaction device for preparing low-carbon olefin by employing methyl alcohol and/or dimethyl ether
  • Reaction device for preparing low-carbon olefin by employing methyl alcohol and/or dimethyl ether

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The dense-phase fluidized bed reactor is equipped with 4 secondary reaction zones, and the dense-phase fluidized bed regenerator is equipped with 4 secondary regeneration zones. The raw materials of methanol and / or dimethyl ether enter the dense-phase fluidized bed for reaction. After contacting with the catalyst including SAPO-34 molecular sieve, the generated gas phase product stream and spent catalyst, gas phase materials and entrained spent catalyst enter the cyclone separator, and the gas phase product stream enters the subsequent separation section through the outlet of the cyclone separator, and is entrained The spent catalyst enters the fourth secondary reaction zone through the feed leg of the cyclone separator. The regenerated catalyst enters the dense-phase fluidized bed reactor through the stripper and riser, and passes through the first to fourth secondary reaction zones in sequence. After carbon deposits, the catalyst is formed, which then passes through the...

Embodiment 2

[0048] 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. The raw materials of methanol and / or dimethyl ether enter the dense-phase fluidized bed for reaction. After contacting with the catalyst including SAPO-34 molecular sieve, the generated gas phase product stream and spent catalyst, gas phase materials and entrained spent catalyst enter the cyclone separator, and the gas phase product stream enters the subsequent separation section through the outlet of the cyclone separator, and is entrained The spent catalyst enters the third secondary reaction zone through the feed leg of the cyclone separator. The regenerated catalyst enters the dense-phase fluidized bed reactor through the stripper and riser, and then passes through the first to third secondary reaction zones in sequence. After carbon deposits, the spent catalyst is formed. The spent catalyst passes ...

Embodiment 3

[0050] 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 of methanol and / or dimethyl ether enter the dense-phase fluidized bed for reaction. After contacting with the catalyst including SAPO-34 molecular sieve, the generated gas phase product stream and spent catalyst, gas phase materials and entrained spent catalyst enter the cyclone separator, and the gas phase product stream enters the subsequent separation section through the outlet of the cyclone separator, and is entrained The spent catalyst enters the sixth secondary reaction zone through the feed leg of the cyclone separator. The regenerated catalyst enters the dense-phase fluidized bed reactor through the stripper and riser, and sequentially passes through the 1st to 6th secondary reaction zones. After carbon deposits, the spent catalyst is formed. The spent catalyst passes through the stripper...

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Abstract

The invention relates to a reaction device for preparing low-carbon olefin by employing methyl alcohol and / or dimethyl ether, in particular to a reaction device for preparing low-carbon olefin by employing methyl alcohol and / or dimethyl ether. The reaction device mainly comprises a dense-phase fluidized bed reactor (2), a cyclone separator (3), a stripper (5), a lift pipe (7), a dense-phase fluidized bed regenerator (10), a cyclone separator (11), a stripper (13) and a lift pipe (15), wherein the dense-phase fluidized bed reactor (2) is partitioned into n (n is greater than or equal to 2) secondary reaction zones by material flow controllers (17); and the dense-phase fluidized bed regenerator (10) is partitioned into m (m is greater than or equal to 2) secondary regeneration zones by the material flow controllers (17). By virtue of the reaction device, the problems in the prior art that carbon deposit distribution of a catalyst is uneven and low-carbon olefin selectivity is relatively low are solved.

Description

Technical field [0001] The invention relates to a reaction device for preparing low-carbon olefins from methanol and / or dimethyl ether. Background technique [0002] Low-carbon olefins, namely ethylene and propylene, are two important basic chemical raw materials, and their demand is constantly increasing. Generally, ethylene and propylene are produced through petroleum routes. However, due to the limited supply of petroleum resources and higher prices, the cost of producing ethylene and propylene from petroleum resources is increasing. In recent years, people have begun to vigorously develop technologies for the conversion of alternative raw materials to ethylene and propylene. The process of converting methanol 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 analysis by CMAI, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C11/06C07C1/20B01J8/26
CPCY02P30/20Y02P30/40
Inventor 张涛叶茂刘中民
Owner 中科催化新技术(大连)股份有限公司
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