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Hydrophobic associating polymer containing capsaicine and sulfonic group and preparation method thereof

A technology of hydrophobic association and sulfonic acid group, which is applied in the direction of drilling compositions, chemical instruments and methods, and can solve problems such as loss of viscosity and decrease in salt resistance

Inactive Publication Date: 2009-03-25
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the commonly used polymers are subjected to large tensile and shear stresses, they are prone to degradation and loss of viscosity, and their salt resistance also drops sharply, thus limiting their applications.

Method used

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  • Hydrophobic associating polymer containing capsaicine and sulfonic group and preparation method thereof
  • Hydrophobic associating polymer containing capsaicine and sulfonic group and preparation method thereof
  • Hydrophobic associating polymer containing capsaicine and sulfonic group and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0015] In a 500ml three-neck flask, add 1.3×10 -3 10 mL of ethanol solution of compound N-(4-hydroxy-3-methoxy-phenylmethyl)acrylamide (HMBA) containing capsaicin functional group, 100 mL of aqueous solution containing 0.1 mol of acrylamide, 0.03 mol of sodium hydroxide Neutralized (neutralization degree 100%) 2-acrylamido-2-methylpropanesulfonic acid (AMPS) aqueous solution 30mL and 1.0×10 -3 mol of (meth)acrylic acid long-chain fatty alcohol ester octadecyl acrylate, stirred at 70°C to make it evenly mixed, then added 0.039g redox initiator K 2 S 2 o 8 and NaHSO 3 , the mass ratio of the two is 2:1, after stirring until the viscosity of the solution increases significantly, the airtight constant temperature is reacted at 70°C for 10 hours, and the hydrophobic olefin containing HMBA-acrylamide-AMPS-acrylic acid tetramembered monomer of the present invention is obtained. Polymer, its number average molecular weight is 50000, dispersion coefficient d is 1.8.

Embodiment 2

[0017] In a three-neck flask, add 1×10 -3 mol of compound N-(4-hydroxy-3-methylthio-benzyl)-acrylamide containing capsaicin functional group in ethanol solution 10mL, aqueous solution containing 0.1mol acrylamide in 100mL, containing 0.03mol is neutralized by sodium hydroxide (Neutralization degree 100%) 2-acrylamido-2-methylpropanesulfonic acid (AMPS) aqueous solution 30mL and 1.1×10 -3 mol of (meth)acrylic acid long-chain fatty alcohol ester octadecyl acrylate, stirred at 100°C to make it evenly mixed, then added 0.039g redox initiator K 2 S 2 o 8 and NaHSO 3 , the mass ratio of the two is 3:1. After stirring until the viscosity of the solution increases significantly, the airtight constant temperature is reacted at 50°C for 8 hours to obtain N-(4-hydroxy-3-methylthio-benzyl)-acrylamide-AMPS- The hydrophobic association copolymer of tetradecyl acrylate monomers has a number average molecular weight of 45000 and a dispersion coefficient d of 1.7.

[0018] The compound co...

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Abstract

The invention discloses a hydrophobic association polymer containing capsaicine and sulfonyl, and a preparation method thereof. During the preparation, compounds containing capsaicine functional groups, acrylamide, 2-acrylamide-2-methylpropanesulfonic acid and (methyl) acrylic acid long-chain fatty alcohol ester are polymerized under the initiation of a a redox initiator; the mole percentage ratio of the compounds containing the capsaicine functional groups, the acrylamide, the 2-acrylamide-2-methylpropanesulfonic acid and the (methyl) acrylic acid long-chain fatty alcohol ester is 0.5-5 to 65-92.5 to 6.5-20 to 0.5-10; the reaction temperature is 30 DEG C to 120 DEG C; and the reaction time is 1h to 20h. The preparation method simultaneously introduces sulfonyl that is insensitive to salt and capsaicine functional group units with rigidity into the large molecules of the hydrophobic association polymer, thereby obtaining the water soluble hydrophobic association polymer which has high tackification and the properties of anti-salt and high temperature resistance, and can be applied to the tertiary oil recovery in oil fields as a novel oil-displacing agent.

Description

technical field [0001] The invention relates to a hydrophobic association polymer, in particular to a hydrophobic association polymer containing capsaicin and sulfonic acid groups and a preparation method thereof. Background technique [0002] Oil extraction generally goes through three stages: primary oil recovery, secondary oil recovery and tertiary oil recovery. Tertiary oil recovery, also known as enhanced oil recovery, is aimed at residual oil and remaining oil that has not been recovered in secondary oil recovery. At present, there are four methods of tertiary oil recovery in the world: chemical flooding, gas flooding, thermal flooding and microbial flooding. Among them, chemical flooding refers to adding chemical substances to the injected water to change the properties of the injected water, so as to achieve the purpose of enhancing oil recovery, and it is also the most important method for improving oil recovery in tertiary oil recovery. [0003] The use of polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F220/54C09K8/588
Inventor 于良民闫雪峰包木太李昌诚姜晓辉闫菊董磊
Owner OCEAN UNIV OF CHINA
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