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A kind of water-in-oil type anionic polyacrylamide emulsion and method thereof

A polyacrylamide, water-in-oil technology, applied in the field of polymer emulsions, can solve problems such as viscosity drop, and achieve the effects of moderate reaction time, good salt resistance and high production efficiency

Active Publication Date: 2021-04-30
东营市诺尔化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another object of the present invention is to provide a method that can be dissolved within tens of seconds (of course, the dissolved solution has an effective use viscosity) and can improve the viscosity of the anionic polyacrylamide emulsion in a high salinity use environment. Preparation process of anionic polyacrylamide emulsion for this problem

Method used

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Examples

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Effect test

preparation example Construction

[0046] The present invention provides a kind of preparation method of water-in-oil type anionic polyacrylamide emulsion, and described preparation method comprises the following steps:

[0047] (1) Preparation of monomer solution for polymerization

[0048] The monomer is dissolved in water, and the pH of the solution is adjusted to neutral by adding a strong base to obtain a monomer solution for polymerization.

[0049] In this step, the monomers preferably use acrylamide, acrylic acid and salt-resistant monomers, wherein the salt-resistant monomers can be selected from allylsulfonic acid, N-vinylpyrrolidone, vinylbenzenesulfonic acid, 2-propene Any one or more of amido-2-methylpropanesulfonic acid and N-vinylamide. The addition of the anti-salt monomer can improve the problem that the viscosity of the emulsion drops significantly in high salinity brine.

[0050] The usage amount of each type of monomer has a preferred range. For acrylamide, the mass of acrylamide accounts f...

Embodiment 1

[0064] Preparation components include:

[0065] Pure water, acrylamide, acrylic acid, salt-resistant monomer (2-acrylamido-2-methylpropanesulfonic acid), strong base (40% sodium hydroxide), hydrocarbon solvent oil (white oil), compound emulsifier (span80, tween81, sodium lauryl sulfate, nonylphenol polyoxyethylene ether), oxidizing agent (tert-butyl hydroperoxide), reducing agent (sodium metabisulfite), azo initiator (azobisisobutyronitrile ), chain transfer agent (sodium formate), complexing agent (substitute base).

[0066] The preparation method comprises the following steps:

[0067] Fully dissolve acrylamide, acrylic acid, and salt-resistant monomers with pure water, add a strong base to neutralize in the reaction kettle, use a 2000mL beaker to fill the cooling water under the reaction kettle during the neutralization process, and adjust the temperature of the reaction kettle submerged in the cooling water Height, control the temperature in the kettle not to be higher t...

Embodiment 2

[0082] The preparation components are basically the same as those in Example 1, except that among the complex emulsifiers, the instant emulsifier is alkylamidopropyl dimethylamine.

[0083] The preparation method is the same as in Example 1.

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Abstract

The invention relates to a water-in-oil type anionic polyacrylamide emulsion and a preparation method thereof. The method comprises the following steps: preparing a monomer solution for polymerization; mixing the monomer solution for polymerization, hydrocarbon solvent oil, a composite emulsifier, an initiator, a chain transfer agent and a complexing agent, and homogeneously emulsifying the obtained mixed solution , and then polymerized to obtain the water-in-oil type anionic polyacrylamide emulsion; the composite emulsifier is a mixture of Span emulsifiers, Tween emulsifiers, ether emulsifiers and instant emulsifiers; The instant emulsifier is selected from any one or more of alkyl amidopropyl dimethylamine, sodium lauryl sulfate, N-hexadecyl-N-ethylmorpholino ethyl sulfate. The fastest dissolution rate of the final emulsion in pure water can reach 10 seconds, and the viscosity loss rate of the simulated formation brine solution (compared with the pure aqueous solution of the same concentration) with a dissolution concentration of 1% and a total salinity of 20,000 mg / L is 40% ~58%.

Description

technical field [0001] The invention relates to the technical field of polymer emulsions, in particular to a water-in-oil anionic polyacrylamide emulsion and a method thereof. Background technique [0002] Polyacrylamide (PAM) is a general term for acrylamide and its derived homopolymers and copolymers, which can be divided into four types: anionic, cationic, nonionic and zwitterionic. Among them, anionic polyacrylamide (APAM) has the properties of flocculation, thickening, water absorption, and drag reduction at the same time, and has a wide range of applications in the fields of oil recovery, papermaking, and water treatment. [0003] Polyacrylamide can also be divided into polyacrylamide emulsion and polyacrylamide powder. [0004] When anionic polyacrylamide is used as a drag reducer for drilling, its dissolution time is an important factor to measure its effect, especially for the construction environment that pursues high efficiency. The dissolution time of powdered ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F2/32C09K8/584
CPCC08F2/32C08F220/56C09K8/584C08F220/06C08F220/585
Inventor 荣敏杰赵海港赵立国
Owner 东营市诺尔化工有限责任公司
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