Fluorine-containing double-tail hydrophobically associating polymer and preparation thereof

A hydrophobic association and polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of weakened synergy of oil-displacing agents and poor oil-displacing effect, and achieve low surface tension, enhanced The effect of stickiness

Inactive Publication Date: 2016-04-06
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recovery of binary and ASP flooding is more obvious than that of polymer flooding, but there are also some defects. Studies have shown that during polymer binary flooding and ASP flooding, due to the migration speed of different components Therefore, the chromatographic separation phenomenon will occur, resulting in the weakening of the synergy between different oil displacement agents, and the oil displacement effect will become poor

Method used

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  • Fluorine-containing double-tail hydrophobically associating polymer and preparation thereof
  • Fluorine-containing double-tail hydrophobically associating polymer and preparation thereof
  • Fluorine-containing double-tail hydrophobically associating polymer and preparation thereof

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preparation example Construction

[0022] Preferably, the preparation method of the fluorine-containing double tail hydrophobic association polymer comprises the following steps:

[0023] Step S1, after mixing 1-2 mole fractions of long-chain alkylamine with 1-2 mole fractions of triethylamine and an organic solvent, add 1 mole fraction of perfluorooctanesulfonyl Fluorine, then raise the temperature to 30-60°C, continue the reaction for 4-10h, the reaction mixture is washed, dried, and distilled under reduced pressure to obtain the product N-alkyl perfluorooctane sulfonamide.

[0024] Further preferably, the organic solvent in step S1 is one or more of toluene, isopropanol, isopropyl ether, acetone or xylene.

[0025] Further preferably, the long-chain alkylamine in step S1 is one of n-hexylamine, n-octylamine, dodecylamine, tetradecylamine, cetylamine, and octadecylamine.

[0026] Further preferably, the reaction mixture in step S1 is washed successively with water, 0.5% hydrochloric acid aqueous solution, sa...

Embodiment 1

[0035] The first step: Synthesis of fluorine-containing double tail polymerizable macromonomer AMPD

[0036] S1, Synthesis of N-dodecyl perfluorooctane sulfonamide

[0037] Add 0.15 mol of dodecylamine, 0.2 mol of triethylamine and 100 mL of isopropyl ether into a 250 mL three-necked flask, mix well and slowly add 0.12 mol of perfluorooctanesulfonyl fluoride dropwise under stirring conditions. Then the temperature was raised to 50°C, and the reaction was continued for 5h. The reaction mixture was washed successively with water, 0.5% hydrochloric acid aqueous solution, and saturated brine, then dried over anhydrous magnesium sulfate, and distilled under reduced pressure to obtain the product N-alkylperfluorooctanesulfonamide.

[0038] S2, Synthesis of Macromonomer AMPD

[0039] Add 0.1 mol N-dodecyl perfluorooctane sulfonamide to the three-neck flask, and add dichloromethane to form a 40% solution. Stir vigorously and blow nitrogen gas, control the temperature at 3°C, slowly...

Embodiment 2

[0048] The first step: Synthesis of fluorine-containing double tail polymerizable macromonomer AMPD

[0049] S1, Synthesis of N-dodecyl perfluorooctane sulfonamide

[0050] Add 0.15 mol of dodecylamine, 0.18 mol of triethylamine and 120 mL of acetone into a 250 mL three-necked flask, mix well and slowly add 0.12 mol of perfluorooctanesulfonyl fluoride dropwise under stirring conditions. Then the temperature was raised to 45°C, and the reaction was continued for 5h. The reaction mixture was washed successively with water, 0.5% hydrochloric acid aqueous solution, and saturated brine, then dried over anhydrous magnesium sulfate, and distilled under reduced pressure to obtain the product N-dodecylperfluorooctanesulfonamide.

[0051] S2, Synthesis of Macromonomer AMPD

[0052] Add 0.15mol N-dodecyl perfluorooctane sulfonamide to the three-necked flask, and add dichloromethane to form a 40% solution. Stir vigorously and blow nitrogen gas, control the temperature at 4°C, slowly ad...

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Abstract

The invention discloses a fluorine-containing double-tail hydrophobically associating polymer and a preparation thereof. According to the polymer, a hydrophobic monomer with fluorine-containing double tails and salt-resistant sulfonic acid groups are introduced into macromolecules. Experimental results indicate that the hydrophobically associating surface active polymer can lower surface tension of water to 23-30 mN/m and can further improve oil recovery by 14.12-16.25%. The hydrophobically associating polymer is good in viscosity increasing performance and heat resistance and salt tolerance and low in surface tension and has good application prospect in the aspects of tertiary recovery, drilling fluid and coating.

Description

technical field [0001] The invention relates to a polymer oil displacement agent, in particular to a fluorine-containing double-tailed hydrophobic association polymer and a preparation method thereof. Background technique [0002] Tertiary oil recovery is the main measure to enhance oil recovery, among which relying on polymer flooding plays an important role. At present, the polymer used in tertiary oil recovery is mainly HPAM, but conventional PAM has poor heat resistance, salt resistance and shear resistance, which leads to unsatisfactory oil recovery. In order to increase the recovery factor more, many scholars have proposed the use of compound flooding, that is, binary and three-element compound flooding. For example: Chinese patent "Binary compound flooding composition and its preparation method" CN102220120A; Its preparation method" CN102277146A; Chinese patent "oil displacement composition for tertiary oil recovery and its preparation method" CN102220124A, etc. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C09K8/584
CPCC08F220/56C09K8/584C08F220/585
Inventor 李凡罗跃苏高申胡攀王文杰张黄鹤罗霄王修武
Owner YANGTZE UNIVERSITY
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