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Olefin polymerization reaction apparatus and method

A technology of olefin polymerization and reaction equipment, which is applied in the field of petrochemical industry, can solve the problems of gas distributor blockage, reduce the number of shutdowns, prolong the production cycle, etc., and achieve the effects of avoiding temperature gradient, improving stability and prolonging the production cycle

Active Publication Date: 2012-10-31
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can solve the problems of particle entrainment, gas distributor blockage and local overheating in gas-solid fluidized bed technology, so as to achieve the purpose of prolonging the production cycle and reducing the number of shutdowns

Method used

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  • Olefin polymerization reaction apparatus and method

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Embodiment Construction

[0062] Below in conjunction with embodiment, further illustrate the present invention.

[0063] The components in the embodiment are as follows: the catalyst is titanium chloride supported on magnesium dichloride, the polymerizable monomer is ethylene, the comonomer is butene, and the chain transfer agent is hydrogen. Non-reactants include nitrogen, propane, n-butane, and isopentane.

[0064] The specific process of the embodiment is as follows:

[0065] Such as figure 1 As shown, the catalyst enters the reaction system from the first reactor 2, that is, the lower part of the bubbling fluidized bed, through a pipeline. Freshly added monomers and comonomers enter the main circulation gas pipeline 14 through pipelines respectively. The circulating gas flows into the compressor 5 and then flows to the circulating gas cooler 6 to be condensed into a gas-liquid mixture. After the gas-liquid mixture passes through the liquid collection tank 7, the separation of gas and liquid is ...

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Abstract

The invention provides an olefin polymerization reaction apparatus and method. The apparatus comprises a gas distributor, a first reactor, a second reactor, a cyclone separator, a liquid collecting tank, a gas stripping section and a material returning leg, wherein the first reactor is a bubbling fluidized bed, and the top is connected with the second reactor; and the second reactor is a fast fluidized bed, the bed diameter ratio of the first reactor to the second reactor is (1.2-3):1, and the height ratio is (0.2-2):1. The apparatus and method are suitable for the polymerization of ethylene, propylene or other gas olefins, can effectively reduce the particle entrainment, gas distributor blockage and local overheating problems during gas olefin polymerization, prolong the production period, reduce the stop frequency, save the production cost and improve economic benefits.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a device and method for olefin polymerization. Background technique [0002] The present invention relates to an olefin polymerization process, specifically inventing a method for continuously polymerizing olefin polymer particles in a fluidized bed reactor, by reducing the entrainment of fine particles by reaction gas, blockage of gas distributors and Partial overheating and other phenomena to achieve the purpose of extending the production cycle. [0003] The traditional gas-phase fluidized bed polymerization reaction device is a closed circulation loop composed of a fluidized bed reactor, a circulating gas compressor, and a circulating gas cooler, and is composed of reaction monomers ethylene, α-olefin, hydrogen and inert gas nitrogen. The circulating gas circulates in the loop to keep the polymer fluidized and the heat of polymerization removed. Catalysts used in the g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F10/02C08F2/01C08F2/34
Inventor 骆广海阳永荣魏舸裔吴文清韩国栋王树芳王靖岱
Owner CHINA PETROLEUM & CHEM CORP
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