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High molecular weight anionic polymer fluid dispersion, preparation and application thereof

An anionic polymer, high molecular weight technology, used in drilling compositions, chemical instruments and methods, flocculation/sedimentation water/sewage treatment, etc. Difficulty maintaining, etc.

Active Publication Date: 2008-10-08
HAISO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] U.S. Patent No. 5,605,970 introduces the hydrophobic monomer 2-ethylhexyl acrylate into the anionic polymer of endenoic acid, but because of its short hydrophobic alkyl group, the increase in apparent viscosity is not very large, and the ester group is easily hydrolyzed. , the increased viscosity is difficult to maintain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of Stabilizer A

[0040]In a 500ml four-neck flask equipped with a stirring device, a nitrogen device, a heating device, and a temperature control device, add 60 g of 2-acrylamido-2-methylpropanesulfonic acid, 230 g of deionized water, and 1N ethylenediaminetetraacetic acid Disodium salt solution 6g, 2% sodium formate solution 1.8g, 10% ammonium persulfate solution 10g, stirred and dissolved, and the solution was passed through N 2 (1L / min) for half an hour, then N 2 React at 50°C for 4 hours under protection, and continue to react at 70°C for 3 hours to obtain a viscous liquid with an intrinsic viscosity of 3.1dl / g. For stabilizer A.

Embodiment 2

[0042] Preparation of Stabilizer B

[0043] Add 45g of 2-acrylamido-2-methylpropanesulfonic acid, 5g of acrylic acid, 240g of deionized water, and 1N ethylenediamine into a 500ml four-neck flask equipped with a stirring device, a nitrogen device, a heating device, and a temperature control device. 6g of disodium tetraacetate solution, 1.8g of 2% sodium formate solution, 10g of 10% ammonium persulfate solution, stirred and dissolved, and the solution was passed through N 2 (1L / min) for half an hour, then N 2 React at 50°C for 2 hours under protection, and continue to react at 70°C for 5 hours to obtain a viscous liquid with an intrinsic viscosity of 4.3dl / g. Stabilizer B.

Embodiment 3

[0045] Preparation of Stabilizer C

[0046] Add 33g of 2-acrylamido-2-methylpropanesulfonic acid, 9g of acrylic acid, 248g of deionized water, and 1N ethylenediamine into a 500ml four-necked flask equipped with a stirring device, nitrogen device, heating device, and temperature control device. 6g of disodium tetraacetate solution, 1.8g of 2% sodium formate solution, 10g of 10% ammonium persulfate solution, stirred and dissolved, and the solution was passed through N 2 (1L / min) for half an hour, then N 2 React at 50°C for 5h under protection, and continue to react at 70°C for 2h to obtain a viscous liquid with an intrinsic viscosity of 4.5dl / g. For stabilizer C.

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Abstract

The invention provides the high molecular weight anionic polymer dispersion liquid and the preparation and application of the dispersion liquid. The anionic polymer dispersion liquid is milky white liquid with intrinsic viscosity greater than 13.2dl / g; the polymer is evenly dispersed in saline solution in the form of small particles, and the particle size is lower than 100nm; the main ingredients of the dispersion liquid are acrylamide, anionic vinyl monomers, as well as the copolymers of hydrophobic monomers. The dispersion liquid takes the inorganic salt solution with 10%-25% of mass concentration as the dispersion medium, and is prepared through the radical polymerization under the effect of stabilizer. The product can be used as flocculants, sludge dewatering agents and oil displacement agents for oilfield tertiary oil recovery, so the product can be widely applied to urban sewage treatment plants, as well as petroleum, chemical, paper and other industries.

Description

Technical field: [0001] The invention relates to a high-molecular-weight anionic polymer in the form of water dispersion and its synthesis and application method. This polymer dispersion can be used as a flocculant, sludge dewatering agent, and oil displacement agent for sewage and sludge treatment in industries such as urban sewage, petroleum, chemical industry, and papermaking, and oil displacement for tertiary oil recovery in oil fields. Background technique: [0002] At present, polymer flocculants or anionic polymers of tertiary oil recovery oil displacement agents face two technical problems of slow dissolution rate and poor salt tolerance of products. As the organic polymer of flocculant and oil displacement agent, increasing the molecular weight can improve its use effect and reduce the dosage, but with the increase of molecular weight, the dissolution of the product will slow down. The greater the molecular weight of the anionic polymer polymerized in an aqueous so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F2/20C08J3/07C08L33/02C08L33/26C02F1/56C02F11/14C09K8/588
Inventor 夏峥嵘李绵贵张江陵杨灿蒋拥华
Owner HAISO TECH