Fluorine-containing hydrophobic-associating surface-active polyacrylamide and preparation method thereof

A polyacrylamide and hydrophobic association technology, which is applied in the field of water-soluble polymers, can solve the problems of poor water solubility, low polyacrylamide fluorine content, and weakened synergistic effect of oil-displacing agents, achieving low cost and strong temperature resistance Effect

Active Publication Date: 2016-04-20
FUSHUN DRAGON CHEM PLANT
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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. Laboratory studies have shown that during polymer binary flooding and ASP flooding, due to the migration of different components The speed is poor, so the chromatographic separation phenomenon will occur, resulting in the weakening of the synergy between different oil displacement agents and the deterioration of the oil displacement effect
However, there are many shortcomings in the preparation process. First, during the micellar polymerization process, due to the poor water solubility of fluorine-containing hydrophobic monomers, even if surfactants are added to form micelles, the synthesized polyacrylamide contains very little fluorine. ;Secondly, after the synthesis, it is necessary to remove the surfactant through a complex post-treatment process

Method used

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  • Fluorine-containing hydrophobic-associating surface-active polyacrylamide and preparation method thereof
  • Fluorine-containing hydrophobic-associating surface-active polyacrylamide and preparation method thereof
  • Fluorine-containing hydrophobic-associating surface-active polyacrylamide and preparation method thereof

Examples

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Effect test

example 1

[0041] Step 1: Synthesis of Surface Active Fluorinated Polymerizable Macromonomer HAPS

[0042] ①. Synthesis of N-dimethylperfluoroalkylsulfonamide

[0043] Add 0.1mol dimethylamine, 0.08mol triethylamine and 100mL isopropanol into a three-necked flask equipped with a spherical reflux condenser, a thermometer and a stirrer, stir and mix evenly, and slowly pour into the reaction system through a constant pressure dropping funnel. 0.05mol perfluorooctanesulfonyl fluoride was added dropwise, then the temperature was raised to 40°C, and the reaction was continued for 6h. The reaction mixture was washed successively with water, 0.5% hydrochloric acid aqueous solution, and saturated brine, then dried over anhydrous sodium sulfate, and distilled under reduced pressure to obtain the product N-dimethylperfluorooctanesulfonamide.

[0044] ②, Synthesis of hydroxypropyl chloroacrylate

[0045] Add 0.1mol of hydroxypropyl acrylate and 100mL of dichloromethane into a three-necked flask eq...

example 2

[0054] Step 1: Synthesis of Surface Active Fluorinated Polymerizable Macromonomer HAPS

[0055] ①. Synthesis of N-diethylperfluorobutanesulfonamide

[0056] Add 0.2 mol of diethylamine, 0.2 mol of triethylamine and 100 ml of isopropyl ether into a three-necked flask equipped with a spherical reflux condenser, a thermometer and a stirrer, stir and mix evenly, and slowly pour into the reaction system through a constant pressure dropping funnel. 0.1mol perfluorooctanesulfonyl fluoride was added dropwise, then the temperature was raised to 60°C, and the reaction was continued for 10h. The reaction mixture was washed successively with water, 0.5% hydrochloric acid aqueous solution, and saturated brine, then dried over anhydrous sodium sulfate, and distilled under reduced pressure to obtain the product N-diethylperfluorobutanesulfonamide.

[0057] ②, Synthesis of hydroxypropyl chloroacrylate

[0058] Add 0.5mol of hydroxypropyl acrylate and 150ml of acetone into a three-necked fla...

example 3

[0065] Step 1: Synthesis of Surface Active Fluorinated Polymerizable Macromonomer HAPS

[0066] ①, N-methyl, ethyl perfluorohexylsulfonamide synthesis

[0067] Add 0.6mol of N-methylethylamine, 0.75mol of triethylamine and 150ml of acetone into a three-necked flask equipped with a spherical reflux condenser, a thermometer and a stirrer, stir and mix evenly, and pour into the reaction via a constant pressure dropping funnel. 0.4 mol of perfluorohexylsulfonyl fluoride was slowly added dropwise into the system; then the temperature was raised to 35° C., and the reaction was continued for 5 hours. The reaction mixture was washed successively with water, 0.5% hydrochloric acid aqueous solution, and saturated brine, then dried over anhydrous sodium sulfate, and distilled under reduced pressure to obtain the product N-methyl, ethyl perfluorohexylsulfonamide.

[0068] ②, Synthesis of hydroxypropyl chloroacrylate

[0069] Add 0.5mol of hydroxypropyl acrylate and 130ml of tetrahydrofu...

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Abstract

The invention discloses fluorine-containing hydrophobic-associating surface-active polyacrylamide which has the following molecular structure (please see the structure in the description), wherein x=100, y=10-20, z=0.05-1.5, n=4 or 6 or 8, and R and R' represent alkyl. The prepared polyacrylamide has the advantages that the excellent tackifying property, heat resistance and salt tolerance are achieved, the surface tension of water can be reduced to 24-32 mN/m, and the good application prospect on tertiary oil recovery, drilling fluid and paint is achieved.

Description

technical field [0001] The invention relates to the technical field of water-soluble polymers, in particular to a fluorine-containing hydrophobic association surface-active polyacrylamide 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 PAM, 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" CN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F220/38
CPCC08F220/56C08F220/387C08F220/585
Inventor 罗跃李凡杨欢苏高申詹泽丞罗霄胡攀王修武
Owner FUSHUN DRAGON CHEM PLANT
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