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Alpha-olefin-styrene super molecular weight drag-reduction polymers and process for preparing the same

An ultra-high molecular weight, styrene technology, used in mechanical equipment, gas/liquid distribution and storage, pipeline systems, etc., can solve the problems of cumbersome operation process, cumbersome processing procedure, high cost, and achieve reaction control temperature increase, polymerization conditions The effect of improving and improving drag reduction efficiency

Inactive Publication Date: 2006-07-05
PIPECHINA SOUTH CHINA CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method greatly improves the monomer conversion rate of the polymerization product and the molecular weight of the polymer, because the reaction heat generated by the bulk polymerization is extremely high, it must be placed in a low-temperature environment to react during the polymerization, and the operation process is very difficult. It is cumbersome; and the obtained polymer product is a viscoelastic solid substance, which must go through a post-treatment process to make it into a fluid state before use. The subsequent treatment process is cumbersome, complicated, and costly; at the same time, the polymer product is dispersed After the solid content is low, the drag reduction efficiency is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Weigh 500kg of α-olefin with C number of 10, 460kg of α-olefin with C number of 12, 40kg of styrene, and mix well; 3 506g, organometallic catalyst Al(Et) 3 97g, mix well.

[0011] The tumbler of the cooling reaction device was cooled to -10°C and protected by nitrogen gas. Then the above two kinds of mixtures are uniformly dispersed on the surface of the drum through feeders of different sizes to form a thin film, and a bulk polymerization reaction takes place. During the reaction process, the linear velocity of the drum was controlled to be 0.02 m / min, and the polymerization reaction time was kept to be 1 hour, and the polymer was scraped off by a scraper installed at the rear of the feeder.

[0012] The above-mentioned polymer is treated with an α-olefin-styrene ultra-high molecular weight copolymer suspension dispersion process to form a dispersion system with a solid content of 40% of the above-mentioned polymer, which can be used as a drag reducer for long-distan...

Embodiment 2

[0015] Weigh 600kg of α-olefin with C number of 8, 380kg of α-olefin with C number of 16, 20kg of styrene, and mix well; 3 438g, organometallic catalyst Al(Et) 2 Cl 121g, mix well.

[0016] The tumbler of the cooling reaction device was cooled to 0°C, and nitrogen protection was introduced. Then the above two kinds of mixtures are uniformly dispersed on the surface of the drum through feeders of different sizes to form a thin film, and a bulk polymerization reaction takes place. During the reaction process, the linear velocity of the drum was controlled to be 0.012 m / min, and the polymerization reaction time was kept to be 1 hour, and the polymer was scraped off by a scraper installed at the rear of the feeder.

[0017] The above-mentioned polymer is treated by α-olefin-styrene ultra-high molecular weight copolymer suspension dispersion process to form a dispersion system with a solid content of 45% of the above-mentioned polymer, which can be used as a drag reducer for lon...

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Abstract

The invention discloses an alpha-olefin-styrene super molecular weight drag-reduction polymers for petroleum pipelines and process for preparing the same, wherein alpha-olefin 80-99.9% of the total raw material weight and 0.1-20 wt% of phenylethene are sufficiently mixed, so thin film is formed in the reaction device isolated from air, then 0.002-0.11 wt% of Ziegler-Natta catalyst is distributed uniformly onto the thin film, the reaction temperature is controlled to trigger bulk polymerization reaction.

Description

[0001] Involved areas: [0002] The invention relates to a preparation method of α-olefin-styrene ultra-high molecular weight copolymer for oil pipeline drag reduction, and relates to the fields of organic polymer compounds and pipeline systems. Background technique: [0003] At present, the drag reducers used in oil pipelines are mainly α-olefin ultra-high molecular weight polymers. Its advanced preparation method is the bulk polymerization method developed in the mid-1990s. Although this method greatly improves the monomer conversion rate of the polymerization product and the molecular weight of the polymer, because the reaction heat generated by the bulk polymerization is extremely high, it must be placed in a low-temperature environment to react when the polymerization is carried out, and the operation process is very difficult. It is cumbersome; and the obtained polymer product is a viscoelastic solid substance, which must go through a post-treatment process to make it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/00F17D1/08
Inventor 李国平张秀杰刘兵张金岭艾慕阳鲍旭晨
Owner PIPECHINA SOUTH CHINA CO
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