Jet flow fluidized bed reaction device and olefin polymerization method thereof

A fluidized bed reaction and fluidized bed technology, applied in the field of polymerized olefins, can solve the problems of increasing gas flow rate and increasing the production cost of polymerized olefins, so as to improve the space-time yield, strengthen the forced heat transfer ability, and precisely control product quality Effect

Active Publication Date: 2014-12-10
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0003] In a variety of different polyolefin production methods developed, the heat of polymerization generated in the gas-phase fluidized bed reactor is taken away by a large amount of circulating gas, which increases the gas flow required for fluidization and increases the production cost of polymerized olefins

Method used

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  • Jet flow fluidized bed reaction device and olefin polymerization method thereof
  • Jet flow fluidized bed reaction device and olefin polymerization method thereof
  • Jet flow fluidized bed reaction device and olefin polymerization method thereof

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Embodiment

[0041] use as figure 1 The shown jet fluidized bed polymerization reaction device of the present invention has been operated in a cold state and computer simulation in a laboratory, and has been operated in a hot state on a hot state device to investigate the polymerization effect of the jet fluidized bed.

[0042] 1) Laboratory cold operating data

[0043] Materials: polyethylene particles with wide particle size distribution, air / nitrogen (nitrogen was used in pressurized experiments).

[0044] The main parameters of the cold experimental device are listed in Table 1, Table 2, and Table 3.

[0045] Running data: adopt the present invention as figure 1 The main parameters of the jet fluidized bed reactor are shown in Table 1, Table 2, and Table 3. Using an ultra-high-speed image analyzer, particle dynamic imaging analysis system, fiber optic particle velocimeter, and differential pressure sensor, it was found that the reaction Particle movement in the side wall area of ​​t...

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Abstract

The invention discloses a jet flow fluidized bed reaction device which comprises two units, namely a polymerization reactor unit and a particle gas cycle conveying unit, wherein the polymerization reactor unit comprises a lower vertical cylinder (1), a middle variable-diameter enlargement section (2) and an upper enlargement section (3); and the particle gas cycle conveying unit comprises a primary cyclone separator (19) and a secondary cyclone separator (22). By utilizing the device disclosed by the invention, C1-C6 olefin feed gas is subjected to an olefin polymerization reaction by using a known addition polymerization catalyst. The jet flow fluidized bed reaction device has the advantages of simple structure, low cost and capability of performing large-scale polyolefin production.

Description

technical field [0001] The invention belongs to a method and device for polymerizing olefins, in particular to a jet fluidized bed reaction device and a method for polymerizing olefins. Background technique [0002] Gas phase polymerization is a known method for preparing polymers. The gas-phase fluidized bed polymerization process has attracted the attention of the polyolefin industry for its simple synthesis process. The production capacity of gas-phase polymerization reactors is generally indexed by space-time yield, which is a key parameter in reactor design. In addition to being related to the characteristics of the polymerization catalyst, it is mainly limited by the heat exchange capacity of the system. In the gas phase fluidized bed polymerization reactor, the heat transfer capacity of the system is mainly determined by the heat transfer capacity per unit volume of the fluidized bed, and the heat generated by the polymerization reaction needs a large amount of circu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24C08F10/00C08F2/01
CPCY02P20/10
Inventor 李俊国程中虎聂伟房倚天黄戒介郝振华
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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