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Hydrophobically associated anionic polyacrylamide water-in-oil emulsion and preparation method thereof

A technology of polyacrylamide and water-in-oil emulsion, which is applied in the field of preparation of water emulsion and hydrophobically associated anionic polyacrylamide water-in-oil emulsion, which can solve the problems of high energy consumption, slow dissolution rate, and low association of hydrophobic groups and other problems, to achieve the effect of improving shear resistance and salt resistance, high production efficiency, and increasing HLB value

Active Publication Date: 2019-12-13
JIANGSU FEYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention solves the technical problems of high energy consumption, slow dissolution rate and low association between hydrophobic groups in the prior art by providing a hydrophobically associated anionic polyacrylamide water-in-oil emulsion and a preparation method thereof, and further Improve the shear resistance and salt resistance of polyacrylamide polymers, with rapid dissolution and high production efficiency

Method used

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  • Hydrophobically associated anionic polyacrylamide water-in-oil emulsion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Dissolve 6g of emulsifier T81 (emulsifier A, accounting for 15% of the total amount of emulsifier) ​​in 100g of deionized water, stir evenly, and then add 17.5g of styrene (hydrophobic monomer, accounting for 5% of the total amount of monomer) dropwise , then stirred at high speed for 30min, then added 122.5g of solid acrylamide, 420g of anionic monomer ammonium acrylate aqueous solution (the mass concentration of anionic monomer is 50%, accounting for 60% of the total amount of monomers), 10g of EDTA with a mass concentration of 5%. -2Na aqueous solution (complexing agent), 0.5g mass concentration of 1% tert-butyl hydroperoxide aqueous solution (water-soluble oxidizing agent) and 15g urea (dissolution accelerator), stirring and dissolving, adjusting pH to 7.2, replenishing water to 700g, Then stir at high speed for 30 minutes to make an aqueous phase solution;

[0050] 10g emulsifier S80 (emulsifier B) and 24g emulsifier T81 were dissolved in 262g D80 solvent oil to ma...

Embodiment 2

[0055] Dissolve 5g of emulsifier Atlas G-1096 (emulsifier A) in 100g of deionized water, stir well, then add 17.5g of hexadecyl (meth)acrylate (hydrophobic monomer) dropwise, and stir at high speed for 30min , then successively add 122.5g solid acrylamide, 420g anionic monomer sodium acrylate aqueous solution (the mass concentration of anionic monomer is 50%), 10g mass concentration is 5% EDTA-2Na aqueous solution (complexing agent), 1g mass concentration is 1% potassium bromate aqueous solution (water-soluble oxidant) and 15g urea (dissolution accelerator), stirring and dissolving, adjusting the pH to 7.5, replenishing water to 700g, and then stirring at high speed for 30min to make an aqueous phase solution;

[0056] Dissolve 13g emulsifier HYPERMER-1038SF (emulsifier B) and 22g emulsifier Atlas G-1096 in a mixed solvent oil of 262g D80 and 5# oil to make an oil phase solution;

[0057] Add the prepared water-phase solution dropwise to the oil-phase solution, and stir at hig...

Embodiment 3

[0061] Dissolve 6g of emulsifier Atlas G-2116 (emulsifier A) in 100g of deionized water, stir evenly, then add 17.5g of dodecafluoroheptyl (meth)acrylate (hydrophobic monomer) dropwise, and stir at high speed for 30min , then successively add 122.5g solid acrylamide, 420g anionic monomer ammonium methacrylate aqueous solution (the mass concentration of anionic monomer is 50%), 10g mass concentration is 5% EDTA-2Na aqueous solution (complexing agent), 1g mass concentration Concentration is 1% potassium bromate aqueous solution (water-soluble oxidant) and 15g urea (dissolution accelerator), stirring and dissolving, adjusting pH to 7, replenishing water to 700g, and then stirring at high speed for 30min to make an aqueous phase solution;

[0062] Dissolve 14g emulsifier HYPERMER-B210 (emulsifier B) and 20g emulsifier Atlas G-2116 in 262g Isopar M white oil to make an oil phase solution;

[0063] Add the prepared aqueous phase solution dropwise to the oil phase solution, and stir ...

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Abstract

The invention relates to a hydrophobically associated anionic polyacrylamide water-in-oil emulsion and a preparation method thereof. The method comprises the following steps: preparing an aqueous phase solution containing an emulsifier, deionized water, acrylamide, an anionic monomer, a water-soluble oxidant and a complexing agent; adding an emulsifier into a solvent oil to prepare an oil phase solution; dropwise adding the aqueous phase solution into the oil phase solution to obtain a water-in-oil pre-emulsion; introducing nitrogen into the water-in-oil pre-emulsion to remove oxygen, adding areducing agent, and carrying out oxidation-reduction reaction; and after the oxidation-reduction reaction is finished, adding a phase inverter to obtain the hydrophobically associated anionic polyacrylamide water-in-oil emulsion. The hydrophobically associated anionic polyacrylamide water-in-oil emulsion prepared by the method has high salt resistance and shearing resistance, is high in molecular weight, has the capability of being quickly dissolved in water, can achieve the effect of instant dissolution after use, and can be widely applied to the fields of oil and gas exploitation, sewage treatment, papermaking, mining and mineral separation and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of water-soluble polymer emulsions, in particular to a preparation method of a hydrophobically associated anionic polyacrylamide water-in-oil emulsion and an aqueous emulsion obtained by the preparation method. Background technique [0002] After the 1980s, in order to improve the efficiency of oil extraction and improve the shear resistance and salt resistance of oil recovery additives, people began to study acrylamide-based hydrophobic association polymers. Hydrophobically modified polyacrylamide The synthesis, structure, and properties of polymers have been extensively studied. [0003] Due to the extreme incompatibility between hydrophobic groups and water, hydrophobic groups aggregate to form hydrophobic microdomains, which is called hydrophobic association. In pure aqueous solution, the aggregation of hydrophobic groups causes association between polymer chains, greatly increases the vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F212/08C08F220/18C08F2/32C08F2/40C08F220/24
CPCC08F220/06C08F2/32C08F2/40C08F220/56C08F212/08C08F220/24
Inventor 何国锋戴明明王勤耿丽霞
Owner JIANGSU FEYMER TECH
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