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Comb-shaped polymer and preparation method and application thereof

A comb-shaped polymer and product technology, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of rare viscosity reducers for heavy oil and single chemical structure.

Inactive Publication Date: 2010-12-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the commercially available polymer viscosity reducers have a single chemical structure, and there are not many viscosity reducers specifically for heavy oil

Method used

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  • Comb-shaped polymer and preparation method and application thereof
  • Comb-shaped polymer and preparation method and application thereof
  • Comb-shaped polymer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 50ml o-xylene, 5.96g maleic anhydride, 21.56g octadecene and 0.52g benzoyl peroxide were charged into a 250ml three-necked flask. Pump nitrogen for 3 to 5 times, and after fully dissolving, react at 110 to 120°C for 1 to 2 hours, and then add 0.2 g of hydroquinone. Then 18g PEG200 and 0.22g p-benzenesulfonic acid are added at a temperature of 100-120°C, and the reaction can be completed within 2 hours, and finally a comb polymer is obtained.

Embodiment 2

[0035] 50ml o-xylene, 7.85g maleic anhydride, 35.4g octadecene and 0.78g benzoyl peroxide were charged into a 250ml three-necked flask. Pump nitrogen for 3 to 5 times, and after fully dissolving, react at 120°C for 1 to 2 hours, and then add 0.25 g of hydroquinone. After cooling to 110°C, 28g PEG400 and 0.22g p-benzenesulfonic acid were added, and the reaction was completed within 2 hours, and finally a comb polymer was obtained.

Embodiment 3

[0037] 50ml o-xylene (or p-xylene), 5.96g maleic anhydride, 15.15g octadecene and 0.52g benzoyl peroxide were charged into a 250ml three-necked flask. Pump nitrogen for 3 to 5 times, and after fully dissolving, react at 110°C for 1 to 4 hours, and then add 0.2 g of hydroquinone. After cooling to 110°C, 40g PEG600 and 0.22g p-benzenesulfonic acid are added, and the esterification reaction can be completed after 2 hours of reaction, and finally a comb polymer is obtained.

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Abstract

The invention relates to a comb-shaped polymer and a preparation method and application thereof. The comb-shaped polymer is prepared by the chemical modification method, wherein different kinds and lengths of polar functional groups are introduced in maleic anhydride and the side chains of alpha-olefine copolymer. The compound for modifying side chains is polyethylene glycol (PEG), polypropylene glycol (PPG) or polybutylene glycol (PBG). Experimental results show that the comb-shaped polymer can be used in the viscosity reducer of high-viscosity crude oil to separately reduce the apparent viscosities of a Liaoho thick oil sample 1 and sample 2 to 99% and 94% of the initial viscosities of the samples at 20 DEG C, and lead to the obvious shear thinning phenomenon. Therefore, the comb-shaped polymer of the invention can be used in the pipeline transportation of thick oil, thus increasing the recovery ratio of thick oil.

Description

Technical field [0001] The invention relates to a method for preparing a comb polymer and its application. Specifically, a comb polymer is prepared by a method of free radical solution polymerization and chemical modification, and applied to the pipeline transportation and improvement of heavy oil. The recovery factor of heavy oil. Background technique [0002] There are many types of crude oil, usually the viscosity is 30mPa.S or 35mm 2 Crude oil with a viscosity of / s and higher is defined as heavy oil. Heavy oil is an important part of global petroleum resources, and it is generally estimated that heavy oil resources are about 10 times more than conventional oil. Heavy oil (including ultra-heavy oil) is a product of biodegradation and oxidation of organic matter after thermally evolving into hydrocarbons, and belongs to naphthenic crude oil composed of high molecular weight hydrocarbons and heteroatoms. [0003] In recent years, as the world's oil prices remain high and the re...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08G65/48C08F222/06C08F210/14C08F8/14C09K8/588
Inventor 郭旭虹邢士理许军李莉房鼎业
Owner EAST CHINA UNIV OF SCI & TECH
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