Thermo-thickening polymer based on graft modification of polyether and preparation method thereof

A graft modification and polymer technology, applied in the field of water-soluble polymers, can solve the problems of difficulty in meeting the actual application requirements of industrialization, increased application costs, harsh preparation conditions, etc. Simple operation effect

Active Publication Date: 2016-11-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently reported thermal tackifying polymers mainly include N-alkyl acrylamide polymers, such as poly-N-isopropylacrylamide, but the preparation conditions are harsh and the cost is extremely high, making it difficult to put into practical application.
Polyether (PEO-PPO-PEO) based thermal tackifying polymers also exhibit thermal gelling properties, but existing polyether based thermal tackifying polymers exhibit this behavior only at higher polymer concentrations (>15%) Thermal viscosity-increasing performance (Polymer Bulletin, 2013, 9, 014.), which makes its application cost greatly increased, and it is difficult to meet the requirements of industrial practical application

Method used

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  • Thermo-thickening polymer based on graft modification of polyether and preparation method thereof
  • Thermo-thickening polymer based on graft modification of polyether and preparation method thereof
  • Thermo-thickening polymer based on graft modification of polyether and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) 4g hexadecyl polyvinylpyrrolidone is dissolved with 100g n-dodecane to form the first solution; 16g of acrylic acid is dissolved in 30% sodium hydroxide solution and adjusted to be neutral, then add 20g of F127, Form the second solution, the amount of lye can be adjusted to a neutral hydrophilic monomer solution with the acidic hydrophilic monomer and the polyether can be completely dissolved; the first solution and the second solution are added to a 500mL four-necked flask and mixed. Form a mixed reaction system of aqueous phase and organic phase;

[0034] (2) Continuously feed N into the flask 2 After removing the oxygen, add the initiator 0.001g 2,2'-azobis(2,4-dimethylvaleronitrile) (V52) and 0.003g lauroyl peroxide (LPO) into the water phase and mix with the organic phase under stirring The reaction system was then reacted at 70°C for 4 hours under nitrogen protection and stirring. After the reaction was completed, it was naturally cooled to room temperature t...

Embodiment 2

[0036](1) 4g hexadecyl polyvinylpyrrolidone is dissolved in 100g n-dodecane to form the first solution, 12g of acrylic acid is dissolved in 30% sodium hydroxide solution and adjusted to be neutral, then add 20g of F127, 4g of acrylamide to form the second solution. The amount of lye can be adjusted to a neutral hydrophilic monomer solution and the polyether can be completely dissolved. Add the first solution and the second solution to 500mL four ports Mix in the flask to form a mixed reaction system of water phase and organic phase;

[0037] (2) Continuously feed N into the flask 2 After removing the oxygen, add the initiator 0.001g V52 and 0.003g LPO into the mixed reaction system of the water phase and the organic phase under stirring, then react at 70°C for 4 hours under the protection of nitrogen and stirring, and naturally cool to the room after the reaction to obtain the reaction liquid. The resulting reaction solution was filtered, the white solid product was collected...

Embodiment 3

[0039] (1) 4g hexadecyl polyvinylpyrrolidone is dissolved in 100g n-dodecane to form the first solution, 8g of acrylic acid is dissolved in 30% sodium hydroxide solution and adjusted to neutrality, then add 20g of F127, 8g of acrylamide to form the second solution. The amount of lye can be adjusted to a neutral hydrophilic monomer solution and the polyether can be completely dissolved. Add the first solution and the second solution to 500mL four ports Mix in the flask to form a mixed reaction system of water phase and organic phase;

[0040] (2) Continuously feed N into the flask 2 After removing the oxygen, add the initiator 0.001g V52 and 0.003g LPO into the mixed reaction system of the water phase and the organic phase under stirring, then react at 70°C for 4 hours under the protection of nitrogen and stirring, and naturally cool to the room after the reaction to obtain the reaction liquid. The obtained reaction solution was filtered, and the white solid product was collec...

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Abstract

The invention provides a preparation method for a thermo-thickening polymer based on graft modification of polyether. The preparation method comprises the following steps: (1) dissolving a dispersant in an organic solvent to form a first solution, dissolving polyether and neutral or / and alkaline hydrophilic monomer in deionized water to form a second solution and mixing the first solution and the second solution in a reactor so as to obtain a water phase-organic phase mixed reaction system, wherein the usage amount of deionized water is adequate for complete dissolving of polyether and the neutral or / and alkaline hydrophilic monomer; and (2) introducing nitrogen or inert gas to remove oxygen in the reactor, adding an initiator into the water phase-organic phase mixed reaction system under stirring and then carrying out a reaction with stirring at 65 to 80 DEG C for 2 to 8 h under the protection of nitrogen or inert gas. The invention also provides the prepared thermo-thickening polymer based on graft modification of polyether. The method provided by the invention can decrease the thermoassociating concentration of the thermo-thickening polymer and reduce usage cost.

Description

technical field [0001] The invention belongs to the field of water-soluble high molecular polymers, and in particular relates to thermal viscosity-increasing polymers based on polyether graft modification and a preparation method thereof. Background technique [0002] Chemical flooding tertiary oil recovery relying on water-soluble polymers and other chemical agents is one of the main ways to increase crude oil production in mature oilfields in eastern my country. It mainly improves the recovery factor by increasing the viscosity of the displacement fluid to expand the sweep efficiency. Partially hydrolyzed polyacrylamide (HPAM) and its derivatives have become the most widely used water-soluble polymer chemical oil displacement agents in the oil and gas industry due to the availability of raw materials, low cost and good hydrophilicity. In mild oil reservoirs, HPAM has achieved ideal results in enhancing oil recovery. However, under high-temperature and high-salt reservoir ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/56C08F220/58C09K8/588
CPCC08F283/06C09K8/588C09K8/882C08F220/585
Inventor 冯玉军谢璐瑶
Owner SICHUAN UNIV
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