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Preparation method of fluorine-containing hyperbranched multi-arm polyacrylamide polymer

A polyacrylamide and hyperbranched polymer technology, applied in chemical instruments and methods, ether preparation, drilling compositions, etc., can solve the problems of affecting the effect of polymer flooding, structural instability, viscosity drop, etc., and achieve good salt resistance. The performance, the preparation method is simple, and the effect of mild conditions

Active Publication Date: 2016-08-31
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since most of the modified products still have a straight-chain structure of polyacrylamide, under high-shear conditions, the structure is unstable and easily destroyed, resulting in a sharp drop in viscosity, which ultimately affects the effect of polymer flooding.

Method used

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  • Preparation method of fluorine-containing hyperbranched multi-arm polyacrylamide polymer
  • Preparation method of fluorine-containing hyperbranched multi-arm polyacrylamide polymer
  • Preparation method of fluorine-containing hyperbranched multi-arm polyacrylamide polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1, prepare the polyglycidyl ether HPG of terminal group rich in hydroxyl

[0048] Add 1,1,1-trimethylolpropane (TMP) (0.187g, 1.39mmol) into the three-necked flask, then dropwise add 0.11mL of 20wt% methanol solution of potassium methoxide (containing 22mg potassium methoxide), react for 20min, Methanol was removed in vacuo, and 20 mL of anhydrous dioxane was added. The temperature was raised to 95°C and 25mL (31.6g) of glycidol was added very slowly (approximately 10h completion). After the addition is complete, continue to react for 5 hours, add a large amount of methanol, pass through the cation column, and remove K+ , with a large amount of acetone precipitation methanol solution to obtain white solid HPG, suction filtration, freeze-drying to obtain product HPG (m=8~10), molecular formula is (C 3 h 8 o 3 ) m , where m is 9 and the branching ratio is 0.6.

Embodiment 2

[0049] Embodiment 2, preparation fluorine-containing hyperbranched multi-arm polyacrylamide polymer

[0050] 30mg HPG, 85mL H 2 O was placed in a three-necked flask, stirred and dissolved, and nitrogen gas was introduced to deoxygenate for 45 minutes, then an aqueous solution of ammonium cerium nitrate (50 mg of ammonium cerium nitrate dissolved in 10 mL) was added under the protection of nitrogen, and the reaction was stirred at 40°C for 30 minutes. Add acrylamide aqueous solution (9.0g acrylamide dissolved in 20mL water), sodium acrylate aqueous solution (2.1g sodium acrylate dissolved in 8mL water), hexafluorobutyl methacrylate monomer emulsion (450mg hexafluorobutyl methacrylate mono The body emulsion was dissolved in 5 mL of water, the emulsifier was sodium lauryl sulfate (450 mg), an aqueous solution of acryloyl phosphorylcholine monomer (360 mg of acryloyl phosphorylcholine monomer was dissolved in 4 mL of water), and then heated to 55 ° C for 6 hours. The obtained rea...

Embodiment 3

[0052] Example 3, preparation of fluorine-containing hyperbranched multi-arm polyacrylamide polymer

[0053] 35mg HPG, 85mL H 2 O was placed in a three-necked flask, stirred and dissolved, and nitrogen gas was introduced to remove oxygen for 45 minutes, and then an aqueous solution of ammonium cerium nitrate (50 mg of ammonium cerium nitrate dissolved in 10 mL of water) was added under the protection of nitrogen, and the reaction was stirred at 40 ° C for 30 minutes. Slowly add acrylamide aqueous solution (10.5g acrylamide dissolved in 23.4mL water), sodium acrylate aqueous solution (2.45g sodium acrylate dissolved in 9.4mL water), hexafluorobutyl methacrylate monomer emulsion (525mg hexafluoromethacrylate Butyl ester monomer is emulsified in 5.8mL water, emulsifier is sodium lauryl sulfate 525mg), acryloyl carboxylate choline monomer aqueous solution (420mg acryloyl carboxylate choline monomer is dissolved in 4.6mL water), then heats up Reaction at 55°C for 6h. The obtained...

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Abstract

The invention discloses a preparation method of a fluorine-containing hyperbranched multi-arm polyacrylamide polymer. The method includes the following steps that 1, hyperbranched polyglycerol with terminal groups containing hydroxyl reacts with a redox initiator under an inert atmosphere, and reaction liquor 1 is obtained; 2, acrylamide monomers, sodium acrylate monomers, fluorine-containing hydrophobic monomers and zwitter-ion choline functional monomers are sequentially and slowly added into the reaction liquor 1 for a graft copolymerization reaction, and the polymer is obtained. The structural formula of the fluorine-containing hyperbranched multi-arm polyacrylamide polymer is shown as the formula I. The shear resistance of the fluorine-containing hyperbranched multi-arm polyacrylamide polymer can be improved due to the three-dimensional spherical hyperbranched multi-arm structure and the fluorine-containing hydrophobic chain segment of the polymer, and the polymer has good salt resistance due to the zwitter-ion choline functional chain segment. The preparation method is simple, aqueous-phase synthesis is adopted, conditions are mild, safety is guaranteed without toxicity, and a series of products can be prepared.

Description

technical field [0001] The invention relates to a preparation method of a fluorine-containing hyperbranched multi-arm polyacrylamide polymer, belonging to the field of polymer materials. Background technique [0002] Polymer flooding enhanced oil recovery technology is one of the important measures for oilfield sustainable development. The CAPtain Oilfield in the North Sea, the Sanand Oilfield in India, and Venezuela, Russia, and the United States have all successfully carried out polymer flooding. Domestic Daqing, Shengli, Henan, and Bohai Oilfields have also carried out large-scale applications, and have achieved significant water control growth. oil effect. Polymer flooding system is the core and basis of polymer flooding technology, and the most widely used one is partially hydrolyzed polyacrylamide polymer. With the deepening of oil field development, the reservoir environment of polymer flooding technology is also gradually changing from the first-class reservoir wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/22C08F230/02C08F4/40C07C41/03C07C43/13C09K8/588
CPCC07C41/03C08F4/40C08F220/56C08F2500/24C08F2800/20C09K8/588C08F220/06C08F220/22C08F230/02C07C43/135
Inventor 陈文娟张健朱玥珺唐恩高薛新生
Owner CHINA NAT OFFSHORE OIL CORP
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