Partially hydrolyzed acrylamide water-soluble polymer with utlralong hydrophobic long chain, preparation method therefor and application thereof

A technology for hydrolyzing acrylamide and water-soluble polymers, which is applied in the field of water-soluble polymer synthesis, can solve the problems of poor underground environment in oilfields and limited application of HPAM, and achieves the effects of safe use, wide potential use value and strong stability.

Inactive Publication Date: 2016-01-13
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The carboxylic acid groups in HPAM will increase the hydrodynamic volume through Coulomb repulsion, but with the increase of small molecular weight e

Method used

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  • Partially hydrolyzed acrylamide water-soluble polymer with utlralong hydrophobic long chain, preparation method therefor and application thereof
  • Partially hydrolyzed acrylamide water-soluble polymer with utlralong hydrophobic long chain, preparation method therefor and application thereof
  • Partially hydrolyzed acrylamide water-soluble polymer with utlralong hydrophobic long chain, preparation method therefor and application thereof

Examples

Experimental program
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Example Embodiment

[0048] Example 1. Preparation of partially hydrolyzed acrylamide water-soluble polymer containing ultra-long hydrophobic long chain

[0049] (1) Weigh 3.192 (0.045 mol) of acrylamide and 0.150 g (0.05 mmol) of hydrophobic monomer behenyl polyoxyethylene ether methacrylate and dissolve in water.

[0050] (2) Weigh 0.36g (0.005mol) of acrylic acid and dissolve it in water, and adjust the pH of the solution to 6-7 with NaOH. Mix the solution obtained in step (1) with the neutralized acrylic acid solution, add it to a 100 mL three-neck flask equipped with a nitrogen tube, a condenser tube and a stirring magnet, and stir with nitrogen at room temperature until it is completely dissolved;

[0051] (3) Add the initiator potassium persulfate (KPS) to the system obtained in step (2), stir it and place it in a constant temperature water bath at 25°C, and deoxidize with nitrogen for 0.5h; relative to the volume of the polymerization system, potassium persulfate The addition amount is 0.11mmol·...

Example Embodiment

[0057] Example 2. Preparation of partially hydrolyzed acrylamide water-soluble polymer containing ultra-long hydrophobic long chain

[0058] The preparation method is the same as that in Example 1, but the difference is: the feeding amount of acrylamide in step (1) is 3.184g (0.0449mol), and the feeding amount of the hydrophobic monomer behenyl polyoxyethylene ether methacrylate The amount is 0.45g (0.15mmol); the feeding amount of acrylic acid in step (2) is 3.36g (0.005mol).

[0059] 3.724 g of powdered modified acrylamide water-soluble polymer containing ultra-long hydrophobic long chains as shown in formula II was obtained, and the yield was ≥93%.

[0060] In formula II, m / (m+n+a)=89.92%, n / (m+n+a)=0.80%, a / (m+n+a)=0.28%, weight average molecular weight M w =2.746×10 6 g·mol -1 .

Example Embodiment

[0061] Example 3. Preparation of partially hydrolyzed acrylamide water-soluble polymer containing ultra-long hydrophobic long chain

[0062] The preparation method is the same as in Example 1, but the difference is: the feeding amount of acrylamide in step (1) is 3.177g (0.04735mol), and the feeding amount of the hydrophobic monomer behenyl polyoxyethylene ether methacrylate The amount is 0.75 g (0.25 mmol), and the feeding amount of acrylic acid in step (2) is 0.36 g (0.005 mol).

[0063] 3.946g of powdered modified acrylamide water-soluble polymer containing ultra-long hydrophobic long chains shown in formula II was obtained, and the yield was ≥92%.

[0064] In formula II, m / (m+n+a)=89.79%, n / (m+n+a)=9.75%, a / (m+n+a)=0.46%, weight average molecular weight M w = 3.188×10 6 g·mol -1 .

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Abstract

The invention discloses a partially hydrolyzed acrylamide water-soluble polymer with an utlralong hydrophobic long chain, a preparation method therefor and an application thereof. A structural formula of the partially hydrolyzed acrylamide water-soluble polymer is as shown in formula II. The preparation method for the polymer as shown in formula II provided by the invention comprises the following steps: (1) under an inert atmosphere, dissolving acrylamide and docosyl polyoxyethylene ether methacrylate into water to obtain a solution I; (2) under the inert atmosphere, dissolving acrylic acid into water to obtain a solution II, and adding NaOH into the solution II to regulate the pH value of the system to 6-7; and (3) mixing solutions I and II obtained in the steps (1) and (2), and adding an initiator into the mixed solution to carry out a polymerization reaction, thereby obtaining the polymer. According to the preparation method provided by the invention, raw materials are easily available, preparation is simple, yield is relatively high, use is safe and storage is convenient. The partially hydrolyzed acrylamide water-soluble polymer with the utlralong hydrophobic long chain can be directly used, and has an extensive potential utilization value in the fields of oil exploitation, paint, medicines, daily use chemicals and the like.

Description

technical field [0001] The invention relates to a partially hydrolyzed acrylamide water-soluble polymer and its preparation method and application, in particular to a partially hydrolyzed acrylamide water-soluble polymer containing ultra-long hydrophobic long chains and its preparation method and application, belonging to high water solubility Molecular synthesis technology field. Background technique [0002] Partially hydrolyzed polyacrylamide (HPAM) is widely used in tertiary oil recovery due to its good water solubility. The carboxylic acid groups in HPAM will increase the hydrodynamic volume through Coulomb repulsion, but with the increase of small molecular weight electrolytes, the underground environment of oil fields is getting worse and worse, and the further application of HPAM is limited. In order to improve the salt resistance of HPAM, researchers have made two efforts: one is to synthesize polyacrylamide or partially hydrolyzed polyacrylamide with ultra-high mo...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/28C08F220/06
Inventor 朱玥珺王晓藜陈文娟唐恩高张健王秀军翟磊梁守成王姗姗王大威谭业邦
Owner CHINA NAT OFFSHORE OIL CORP
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