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Low-crystallinity high-molecular-weight polyolefin, synthesis and application thereof

A high molecular weight, polyolefin technology, used in gas/liquid distribution and storage, mechanical equipment, piping systems, etc., can solve the problems of long onset time, poor solubility, low drag reduction rate, etc. The effect of reducing influence and improving solubility

Pending Publication Date: 2020-06-02
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies of existing drag reducers, especially the problems of poor solubility, long onset time and low drag reduction rate caused by crystallization of drag reducers, the first aspect of the present invention proposes a low Crystalline High Molecular Weight Polyolefin

Method used

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  • Low-crystallinity high-molecular-weight polyolefin, synthesis and application thereof
  • Low-crystallinity high-molecular-weight polyolefin, synthesis and application thereof
  • Low-crystallinity high-molecular-weight polyolefin, synthesis and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment proposes a synthetic method of low crystallinity and high molecular weight polyolefin, and the weight percentage of each component in the raw material is as follows:

[0041] C 5 ~C 20 Alpha olefins: 20

[0042] Solvent: 75

[0043] Main Catalyst: 1

[0044] Cocatalyst: 4

[0045] Reaction temperature: 5°C

[0046] Response time: 72 hours

[0047] Acid alcohol volume ratio: 1:10

[0048] Wherein the monomers are 1-decene and 1-hexene, the molar ratio is 100:1, and the volume is 50 milliliters; the main catalyst is MgCl 2 Carrier TiCl 4 , the quality is 20 mg; the cocatalyst is triisobutylaluminum, and the volume is 1 milliliter; the solvent is cyclohexane, and the volume is 80 milliliters; for 500ml.

[0049] The preparation steps are as follows:

[0050] (1) Refining the monomer and solvent, removing water and oxygen, and the water content is less than 50 ppm.

[0051] (2) Baking the reaction vessel and purging with inert gas to remove wate...

Embodiment 2

[0065] This embodiment proposes a synthetic method of low crystallinity and high molecular weight polyolefin, and the weight percentage of each component in the raw material is as follows:

[0066] C 5 ~C 20 Alpha olefins: 30

[0067] Solvent: 65

[0068] Main Catalyst: 1

[0069] Cocatalyst: 4

[0070] Reaction temperature: -5°C

[0071] Response time: 84 hours

[0072] Acid alcohol volume ratio: 1:10

[0073] Wherein the monomers are 1-octene and 1-pentene, the molar ratio is 80:1, and the volume is 50 milliliters; the main catalyst is MgCl 2 Carrier TiCl 4 , the quality is 20 mg; the cocatalyst is triisobutylaluminum, and the volume is 1 milliliter; the solvent is cyclohexane, and the volume is 60 milliliters; for 500ml.

[0074] The preparation steps are as follows:

[0075] (1) Refining the monomer and solvent, removing water and oxygen, and the water content is less than 50 ppm.

[0076] (2) Baking the reaction vessel and purging with inert gas to remove wat...

Embodiment 3

[0085] This embodiment proposes a synthetic method of low crystallinity and high molecular weight polyolefin, and the weight percentage of each component in the raw material is as follows:

[0086] C 5 ~C 20 Alpha olefins: 40

[0087] Solvent: 55

[0088] Primary Catalyst: 2

[0089] Cocatalyst: 3

[0090] Reaction temperature: 20°C

[0091] Response time: 96 hours

[0092] Acid alcohol volume ratio: 2:8

[0093] Wherein the monomers are 1-decene and 1-octene, the molar ratio is 60:1, and the volume is 50 milliliters; the main catalyst is zirconocene dichloride, and the quality is 40 mg; the cocatalyst is methylaluminoxane MAO, The volume is 3 ml; the solvent is n-hexane, the volume is 80 ml; the acid alcohol is a mixture of concentrated hydrochloric acid and methanol, the volume ratio of acid alcohol is 2:8, and the volume is 500 ml.

[0094] Proceed as follows:

[0095] (1) Refining the monomer and solvent, removing water and oxygen, and the water content is less t...

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Abstract

The invention discloses low-crystallinity high-molecular polyolefin, preparation and application thereof. The raw materials of the polyolefin comprise the following components: an alpha olefin monomer, a solvent, a main catalyst and a cocatalyst, wherein the alpha olefin monomer comprises high-carbon olefin and low-carbon olefin at the same time, the high-carbon olefin is at least one selected from olefins with the carbon number of 8-20, and the low-carbon olefin is at least one selected from olefins with the carbon number of 5-8. According to the invention, the molecular weight of the polyolefin product is more than 10<6>; through copolymerization of high-carbon olefin and low-carbon olefin, the low-carbon olefin is inserted into a chain segment structure to destroy the side chain crystallization of the high-carbon olefin, so that the crystallinity in finished product oil is reduced; and the solubility of the polyolefin in finished oil is improved, the onset time is shortened, and thegood drag reduction effect is achieved.

Description

technical field [0001] The invention relates to the synthesis of a polyolefin with low crystallinity and high molecular weight, which can be used as a pipeline for conveying refined oil, and has the effect of reducing resistance and increasing transportation. Background technique [0002] With the development of the petroleum industry, the pipeline transportation volume of crude oil and refined oil is increasing day by day. Adding drag reducing agent to the transportation pipeline can not only increase the transportation volume, but also save energy and money, so it is widely used, and the research on drag reducing agent is increasingly received Pay attention to. When the fluid contains certain substances, its frictional resistance in turbulent flow will be greatly reduced. This phenomenon is called drag reduction, and the additives that can achieve drag reduction are called drag reducing agents (DRA). Drag reducers can be divided into water-soluble drag reducers and oil-so...

Claims

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Application Information

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IPC IPC(8): C08F210/14C08F6/10C08F6/08C08F6/12F17D1/17
CPCC08F210/14C08F6/10C08F6/02C08F6/12F17D1/17
Inventor 宾月珍李隆伟赵巍李东城唐萍李世瀚王晓霖王刚
Owner CHINA PETROLEUM & CHEM CORP
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