A method for preparing olefin polymers using multi-temperature reaction zones

An olefin polymer and a technology for olefin polymerization, which are applied in the field of preparing olefin polymers by using multi-temperature reaction zones, can solve the problems of unsuitable reaction exothermic polyethylene, low heat transfer efficiency in the descending section, mutual interference of gases, etc. Heat removal ability, improved space-time yield, and the effect of not easy to stick or agglomerate
CN104628904BActive Publication Date: 2017-06-13ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN Ā· China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2017-06-13

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Abstract

The invention discloses a method for preparing olefin polymer by utilizing multiple temperature reaction areas. The method provided by the invention comprises the following step of forming a plurality of olefin polymer reaction areas with different temperatures in a fluidized bed reactor by utilizing a circulating medium, wherein the circulating medium comprises an olefin monomer and a condensing agent. By utilizing the method, preparation of high-performance olefin polymer product by utilizing a single reactor is realized. The method is high in heat transfer efficiency. The olefin polymer prepared by utilizing the method is low in density, wide in distribution, uniform in degree of crystallinity and the like and can be widely applied to various fields of thin-film materials and the like.
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Description

technical field

[0001] The invention relates to a method for preparing olefin polymers, in particular to a method for preparing olefin polymers using multi-temperature reaction zones. Background technique

[0002] As we all know, olefin polymers are widely used in various fields, and its rigidity, toughness and lightness are irreplaceable by many materials. To improve and enhance the performance of olefin polymers is the goal that researchers are constantly pursuing.

[0003] In the traditional olefin polymerization process, the typical method is to use reactors in series to polymerize to produce polyolefin with double / broad peak molecular weight distribution. This method can make the product have excellent performance and processing performance, so as to achieve high product yield Performance. For example, patent WO2009 / 076733A1 discloses "a process for producing ultra-high molecular weight polyethylene by slurry method", olefins form lower molecular weight polymers at hi...

Claims

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