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Preparation method for graft-modified hydrophobic associated polymer

A technology of hydrophobic association and graft modification, which is applied in the field of preparation of graft-modified hydrophobic association polymers, which can solve problems such as loss of use value, stability problems, and easy degradation, and achieve safe use and convenient storage , the effect of high conversion rate

Inactive Publication Date: 2018-09-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oil displacement polymer AP-P4 is acrylamide, acrylic acid, alkyl dimethyl allyl ammonium chloride copolymer, molecular weight 1.7×10 6 , the degree of hydrolysis is 18.2%, and the content of hydrophobic groups is less than 1%. , resulting in viscosity loss
At high temperature, the viscosity of the polymer solution will decrease due to oxidation, thermal damage, etc., thus losing its use value

Method used

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  • Preparation method for graft-modified hydrophobic associated polymer
  • Preparation method for graft-modified hydrophobic associated polymer
  • Preparation method for graft-modified hydrophobic associated polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 1.25g of hydroxypropyl methylcellulose (HPMC) and add it into a four-necked bottle equipped with agitator, condenser, nitrogen pipe and thermometer, and measure 60mL distilled water into the four-necked bottle, seal it, and stir it mechanically Let it dissolve completely. Weigh 13.69g of acrylamide (AM) and 4.56g of acrylic acid (AA) into a beaker, measure 10mL of distilled water to dissolve, adjust the pH to 7.0 with NaOH solution, add to the above mixture, stir to dissolve. Weigh 0.5 g of stearyl methacrylate (SMA) and 5.76 g of sodium dodecyl sulfate (SDS) into a beaker, measure 20 mL of distilled water and stir to dissolve into an emulsion. Weigh 0.318g potassium persulfate (K 2 S 2 o 8 ) and 0.08g sodium bisulfite (NaHSO3 ) into the above mixture, stirred to dissolve, put the four-neck flask in a 25°C constant temperature water bath, stirred nitrogen and deoxygenated for 30 minutes, raised the temperature of the water bath to 60°C and reacted for 8 hours t...

Embodiment 2

[0041] Weigh 1.25g of hydroxypropyl methylcellulose (HPMC) and add it into a four-necked bottle equipped with agitator, condenser, nitrogen pipe and thermometer, and measure 60mL distilled water into the four-necked bottle, seal it, and stir it mechanically Let it dissolve completely. Weigh 13.31g of acrylamide (AM) and 4.44g of acrylic acid (AA) into a beaker, measure 10mL of distilled water to dissolve, adjust the pH to 7.0 with NaOH solution, add to the above mixture, stir to dissolve. Weigh 1.0 g of stearyl methacrylate (SMA) and 5.76 g of sodium dodecyl sulfate (SDS) into a beaker, measure 20 mL of distilled water and stir to dissolve into an emulsion. Weigh 0.318g potassium persulfate (K 2 S 2 o 8 ) and 0.08g sodium bisulfite (NaHSO 3 ) into the above mixture, stirred to dissolve, put the four-neck flask in a 25°C constant temperature water bath, stirred nitrogen and deoxygenated for 30 minutes, raised the temperature of the water bath to 60°C and reacted for 8 hours...

Embodiment 3

[0043] Weigh 1.25g of hydroxypropyl methylcellulose (HPMC) and add it into a four-necked bottle equipped with agitator, condenser, nitrogen pipe and thermometer, and measure 60mL distilled water into the four-necked bottle, seal it, and stir it mechanically Let it dissolve completely. Weigh 12.56g of acrylamide (AM) and 4.19g of acrylic acid (AA) into a beaker, measure 10mL of distilled water to dissolve, adjust the pH to 7.0 with NaOH solution, add to the above mixture, stir to dissolve. Weigh 2.0 g of stearyl methacrylate (SMA) and 5.76 g of sodium dodecyl sulfate (SDS) into a beaker, measure 20 mL of distilled water and stir to dissolve into an emulsion. Weigh 0.318g potassium persulfate (K 2 S 2 o 8 ) and 0.08g sodium bisulfite (NaHSO 3 ) into the above mixture, stirred to dissolve, put the four-neck flask in a 25°C constant temperature water bath, stirred nitrogen and deoxygenated for 30 minutes, raised the temperature of the water bath to 60°C and reacted for 8 hours...

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Abstract

The invention discloses a preparation method for a graft-modified hydrophobic associated polymer, especially a method for preparing a hydrophobic associated water-soluble polymer through hydrophobic modification of a natural product, and belongs to the field of water-soluble polymer synthesis technologies. The preparation method comprises the following steps: copolymerizing hydroxypropyl methyl cellulose (HPMC), hydrophilic monomer acrylic acid (AA), hydrophilic monomer acrylic amide (AM), and hydrophobic monomer stearyl methyl acrylate (SMA) in a single solvent, and using potassium persulfate / sodium hydrogen sulfite (K2S2O8 / NaHSO3) as an initiator, to obtain the graft-modified hydrophobic associated polymer. The polymer is good in water solubility, and has the remarkable thickening property, shearing resistance and heat resistance. A powder product can be obtained by repeatedly precipitating through absolute ethyl alcohol, drying and smashing, and has the extensive application prospect in the fields of high-temperature oilfield development, paint, flocculation, sewage treatment and the like.

Description

technical field [0001] The invention relates to the technical field of water-soluble polymer synthesis, in particular to a preparation method of a graft-modified hydrophobic association polymer. Background technique [0002] Hydrophobically associated water-soluble polymers are a class of water-soluble polymers that contain a small amount of hydrophobic groups (<2%, mole fraction) introduced into the polymer macromolecular chain. The molecular chain of this type of hydrophobic association polymer has both a hydrophilic main chain and a hydrophobic side group. Because the content of the hydrophobic group is very low, the polymer can be dissolved in water. Therefore, it has broad application prospects in many scientific fields such as tertiary oil recovery, drilling, coatings and drug controlled release. The basic principle of polymer flooding to enhance oil recovery is to increase oil displacement efficiency, which is mainly realized through adsorption and viscosity effec...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F220/06C08F220/56C08F220/18
CPCC08F251/02C08F220/1818
Inventor 车玉菊刘宇龙孟凡君马庆林
Owner SHANDONG UNIV
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