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Comb-shaped polymer and preparation method and application thereof

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

Inactive Publication Date: 2012-10-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Embodiment 2

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

Embodiment 3

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

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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-shapedpolymer 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 preparation method and application of a comb-shaped polymer, in particular, a comb-shaped polymer is prepared by free radical solution polymerization and chemical modification, and is applied to pipeline transportation and raising of heavy oil heavy oil recovery. Background technique [0002] There are many kinds of crude oil, usually the viscosity is 30mPa.S or 35mm 2 / s and higher viscosity crude oil is defined as heavy oil. Heavy oil is an important part of global oil resources, and it is usually estimated that heavy oil resources are more than 10 times that of conventional oil. Heavy oil (including super heavy oil) is the product of biodegradation and oxidation after thermal evolution of organic matter into hydrocarbons, and belongs to naphthenic crude oil composed of high molecular weight hydrocarbons and heteroatoms. [0003] In recent years, with the world's high oil price and the sharp reduction of conventional oil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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