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Preparation method of water-in-water cationic polyacylamide emulsion

A technology of acrylamide and anion, which is applied in the field of preparation of "water-in-water" anionic polyacrylamide emulsion, which can solve the problems of low salt content and poor fluidity of polymer emulsion

Active Publication Date: 2010-02-17
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1479762A patent has poor fluidity of prepared polymer emulsion because of no polyol and low salt content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a beaker, add 82.1240g deionized water, 55.4108g ammonium sulfate, 25.6506g acrylamide, 3.6362g 2-acrylamide-2-methylpropanesulfonic acid, 2.4783g ethyl methacrylate, 8.8696g polyethylene glycol 200 monoacrylate, 6.5015g of stabilizer, 0.0296g of EDTA, adjust the pH to 7.0 with 40% NaOH, and emulsify evenly with an emulsifier; slowly pour the solution from the beaker into a container equipped with a stirring rod, a nitrogen pipe and a precision thermometer In a four-neck flask, keep the temperature at 30°C, start stirring at a stirring speed of 450 rpm, and blow nitrogen to drive out oxygen; after 15 minutes, add 1.2mL of 0.3wt% ammonium persulfate / triethanolamine, and keep warm at 30°C for 7h of polymerization. The polymerization system changed from translucent to milky white, and the viscosity first increased and then decreased, and finally stabilized. After the polymerization reaction was carried out for 6 hours, 0.4 mL of 0.3 wt % ammonium persulfate / triethanolam...

Embodiment 2

[0024] In a beaker, add 96.8902g deionized water, 36.1652g ammonium sulfate, 25.0325g acrylamide, 3.6362g 2-acrylamide-2-methylpropanesulfonic acid, 4.4609g ethyl methacrylate, 6.6522g polyethylene glycol 200 monoacrylate, 7.9563g stabilizer, 0.0289g EDTA, adjust the pH to 7.0 with 40% NaOH, and emulsify evenly with an emulsifier; slowly pour the solution from the beaker into a four-wheeled tank equipped with a stirring rod, a nitrogen pipe and a precision thermometer In a flask with a constant temperature of 18°C, the stirring was started at a stirring speed of 450 rpm, and the oxygen was driven by passing through nitrogen; after 15 minutes, 1.8mL of 0.3wt% ammonium persulfate / triethanolamine was added respectively, and the polymerization was carried out at 18°C. The polymerization system consisted of The translucent state becomes milky white, the viscosity first increases and then decreases, and finally tends to be stable. After the polymerization reaction was carried out fo...

Embodiment 3

[0026]In a beaker, add 89.6753g deionized water, 46.1460g ammonium sulfate, 25.0325g acrylamide, 5.4543g 2-acrylamide-2-methylpropanesulfonic acid, 3.4696g methyl methacrylate, 6.6522g polyethylene glycol 200 monoacrylate, 8.1217g stabilizer, 0.0295g EDTA, adjust the pH to 7.0 with 40% NaOH, and emulsify evenly with an emulsifier; slowly pour the solution from the beaker into a four-wheeled tank equipped with a stirring rod, a nitrogen pipe and a precision thermometer In a flask with a constant temperature of 35°C, start stirring at a stirring speed of 450 r / min, and blow nitrogen to expel oxygen; after 15 minutes, add 1.8mL of 0.3wt% ammonium persulfate / triethanolamine respectively, and keep warm at 35°C for polymerization reaction. The polymerization system consists of The translucent state becomes milky white, the viscosity first increases and then decreases, and finally tends to be stable. After the polymerization reaction was carried out for 5 hours, 0.6 mL of 0.3 wt % am...

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PUM

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Abstract

The invention relates to a synthetic method of water-in-water cationic polyacylamide emulsion. The synthetic method is characterized by mixing inorganic salt, non-ionic hydrophilic monomers, anionic monomers, hydrophobic monomers, functional monomers having surface activity, a stabilizing agent, a chelating agent and deionized water, adjusting the pH value to be between 6.5 and 7.5, uniformly emulsifying the mixture by an emulsifying machine, introducing nitrogen for protection, adding an evocating agent at twice at the temperature of 18 to 50 DEG C, carrying out second polymerization reactionfor 1 to 3 hours after 4 to 7 hours of the time of first polymerization reaction and making the emulsion product.

Description

technical field [0001] The invention belongs to the technical field of water-soluble polymer synthesis, and relates to a preparation method of a "water-in-water" anionic polyacrylamide emulsion. Background technique [0002] Polyacrylamide water-soluble polymer materials are widely used in thickening, drag reduction, bonding and other fields because of their good water solubility and excellent viscosity-increasing properties. Among them, anionic polyacrylamide water-soluble polymer materials are widely used in tertiary oil recovery because their molecular weight can reach tens of millions. [0003] The traditional polyacrylamide synthesis methods have disadvantages, which are greatly restricted in industrial applications. The aqueous solution polymerization method has the disadvantages of high viscosity, difficult stirring and slow heat dissipation in the later stage of the reaction. It needs to consume a lot of heat and use special equipment to dry and make powder. However...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C08F220/18C08F220/28C08F2/30
Inventor 郑书忠滕厚开陈军王素芳邢凡彬林蓓宋承鹏
Owner CHINA NAT OFFSHORE OIL CORP
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