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On-line control device and its method for gas-phase polymerization reaction of olefin

A gas-phase polymerization and control device technology, applied in non-electric variable control, control/regulation systems, and simultaneous control of multiple variables, etc., can solve problems such as prolonged transition time, product quality fluctuations, composition control oscillations, etc.

Active Publication Date: 2007-02-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using such non-real-time data to feed back and adjust the feed ratio may easily cause oscillations in the composition control process
eventually lead to fluctuations in product quality
During the start-up of industrial reactors and the switching of product grades, the detection lag of chromatography also prolongs the transition time of composition control and increases the amount of transition materials

Method used

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  • On-line control device and its method for gas-phase polymerization reaction of olefin
  • On-line control device and its method for gas-phase polymerization reaction of olefin
  • On-line control device and its method for gas-phase polymerization reaction of olefin

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Embodiment Construction

[0014] The term "alkene" used in this specification refers to one or more 2 =CHR, wherein R is hydrogen or an alkene represented by an alkyl, cycloalkyl or aryl group having 1 to 10 carbon atoms. "Polymerization" means "homopolymerization" or "copolymerization", unless the definition is specified otherwise.

[0015] In addition, the present invention also relates to a gas phase polymerization device, which adopts the above-mentioned method for on-line detection and control of gas phase composition.

[0016] Such as figure 1 As shown, in the olefin polymerization device using a gas phase polymerization reactor 1, a solid catalyst component is used, and a pressure measurement system 5, a temperature measurement system 6, and a tail gas line 7 are provided on the gas phase polymerization reactor 1, and on the tail gas line 7 A differential pressure flow controller 8, a thermal flow controller 9, and a thermal conductivity detector 10 are provided, and a feed line 4 is provided ...

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Abstract

An on-line control device and method for the gas-phase polymerizing reaction of olefin in the polymerizing apparatus with feeding line and tail gas line features that the differential flow controller, thermal flow controller and thermal conductivity detector are serially connected in said tail gas line for measuring the components and flow of tail gas, which are used to control the ratio of fresh H2 to fresh defin in the gas-phase polymerizing reactor.

Description

technical field [0001] The invention relates to an online control device and method for olefin gas phase polymerization reaction. More specifically, when olefins are polymerized in a gas phase reactor, it relates to a method for on-line detection and control of the composition of the gas phase in the reactor, and wherein the polymerization of olefins is a method of on-line detection and control of the composition of the gas phase gas phase polymerization method. Background technique [0002] Polyolefins include homopolymers and copolymers of olefins, which are produced by homopolymerization or copolymerization of olefins. The polymerization processes mainly include slurry method, solution method and gas phase method. The gas-phase method is popular in the industry because of its simple process, high operating flexibility, and low process energy consumption, and has become the mainstream of polymerization process development. [0003] In the gas phase polymerization process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F2/34G05D27/02
Inventor 李伯耿范宏胡激江卜志扬张军伟
Owner ZHEJIANG UNIV