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Tertiary aliphatic amine group-contained macromolecule as well as preparation method and application thereof

A technology of aliphatic tertiary amines and macromolecules, which is applied in the field of preparation of long-chain branched structure, high molecular weight, temperature-resistant and salt-resistant polyacrylamide, which can solve the problems of poor temperature-resistant and salt-resistant performance, and difficulty in increasing the molecular weight of polyacrylamide. , to achieve good temperature resistance

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the disadvantages of poor heat and salt resistance of traditional polyacrylamide, and the difficulty of increasing the molecular weight of polyacrylamide synthesized by copolymerization of temperature and salt resistant monomers, the present invention provides a macromolecule containing fatty tertiary amine groups and its preparation The method is to form an oxidation-reduction initiation system with persulfate, and initiate the polymerization of acrylamide and temperature-resistant and salt-resistant monomers in aqueous solution to obtain long-chain branched high-molecular-weight, temperature-resistant and salt-resistant polyacrylamide. Salt performance has been greatly improved compared with existing products

Method used

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  • Tertiary aliphatic amine group-contained macromolecule as well as preparation method and application thereof
  • Tertiary aliphatic amine group-contained macromolecule as well as preparation method and application thereof
  • Tertiary aliphatic amine group-contained macromolecule as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Preparation of macromolecule A containing fatty tertiary amine groups: poly N-(3-dimethylaminoethyl) acrylamide-co-poly 2-acrylamido-2-methyl propane sulfonate sodium, structure such as (3 )Mode:

[0068]

[0069] Dissolve 37.30 grams of 2-acrylamido-2-methylpropanesulfonic acid in 80.0 grams of water, add 7.2 grams of sodium hydroxide under stirring, and add 2.84 grams of N-(3-dimethylaminoethyl base) acrylamide, through high-purity nitrogen deoxygenation for 20 to 30 minutes, add 1.16 grams of mercaptoethylammonium hydrochloride and 166 mg of 2,2-azobis(2-amidinopropane) dihydrochloride, at 60 React at ~70°C for 6 hours, remove the solvent water under reduced pressure to obtain a white solid, soak the white solid in ethanol for 3 times, pour off the supernatant, and dry the lower layer at 40°C in vacuum to obtain the product. The molecular weight of the product is Mn=14500, and the repeating unit ratio of the two monomers is m:n=1:9.5.

Embodiment 2

[0071] Preparation of macromolecule B containing fatty tertiary amine groups: poly N-(3-dimethylaminoethyl) acrylamide-co-poly 2-acrylamido-2-methylpropanesulfonate sodium, structure such as (3 )Mode;

[0072] Dissolve 41.02 grams of 2-acrylamido-2-methylpropanesulfonic acid in 80.0 grams of water, add 7.92 grams of sodium hydroxide under stirring, and add 284 mg of N-(3-dimethylaminoethyl base) acrylamide, deoxygenated by high-purity nitrogen for 20 to 30 minutes, added 166 mg of 2,2-azobis(2-amidinopropane) dihydrochloride, and reacted for 6 hours at 60 to 70°C, and reduced The solvent water was removed under pressure to obtain a white solid; after the white solid was soaked in ethanol for 3 times, the supernatant was poured off, and the lower layer was vacuum-dried at 40°C to obtain the product. The molecular weight of the product is Mn=185000, and the repeating unit ratio of the two monomers is m:n=1:105.

Embodiment 3

[0074] Preparation of macromolecule C containing fatty tertiary amine groups: poly N-(3-dimethylaminopropyl) acrylamide-co-poly 2-acrylamido-2-methyl propane sulfonate sodium, structure such as (4 )Mode:

[0075]

[0076] Dissolve 37.30 grams of 2-acrylamido-2-methylpropanesulfonic acid in 80.0 grams of water, add 7.2 grams of sodium hydroxide under stirring, and add 3.12 grams of N-(3-dimethylaminopropyl base) acrylamide, through high-purity nitrogen deoxygenation for 20 to 30 minutes, add 1.16 grams of mercaptoethylammonium hydrochloride and 166 mg of 2,2-azobis(2-amidinopropane) dihydrochloride, at 60 React at ~70°C for 6 hours, remove the solvent water under reduced pressure to obtain a white solid, soak the white solid in ethanol for 3 times, pour off the supernatant, and dry the lower layer at 40°C in vacuum to obtain the product. The molecular weight of the product is Mn=12800, and the repeating unit ratio of the two monomers is m:n=1:9.8. Hydrogen spectra such as ...

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Abstract

The invention provides a tertiary aliphatic amine group-contained macromolecule as well as a preparation method and application thereof to an oil-displacing agent and relates to the preparation of high-molecular-weight temperature-resistant salt-resistant polyacrylamide with a long branched-chain structure. The tertiary aliphatic amine group-contained macromolecule synthesized by the invention and persulfate form an oxidation-reduction initiating system to initiate the polymerization of acrylamide and a temperature-resistant salt-resistant monomer in an aqueous solution to obtain the high-molecular-weight temperature-resistant salt-resistant polyacrylamide with the long branched-chain structure, and the temperature-resistant salt-resistant performance of a product is greatly improved thanthat of a traditional product. The invention is used for the field of tertiary oil recovery.

Description

technical field [0001] The invention relates to the field of tertiary oil recovery, in particular to the synthesis of macromolecules containing fatty tertiary amine groups and its application in the preparation of high molecular weight, temperature-resistant and salt-resistant polyacrylamide with long-chain branched structure. Background technique [0002] Polyacrylamide is a kind of multipurpose water-soluble polymer, which is widely used in paper industry, textile industry, metallurgy, mineral processing and sewage treatment. In recent years, with the increasing difficulty of oilfield exploitation, polymer oil displacement agents represented by polyacrylamide solution have excellent performance in tertiary oil recovery, and have played an important role in stabilizing and increasing oilfield production. Industrial applications have also driven the upsurge of polyacrylamide research and development. Taking tertiary oil recovery as an example, based on economic benefits and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F220/60C08F220/56C08F4/40C09K8/588
Inventor 伊卓李勇林蔚然计文希魏小林祝纶宇杜凯赵方园刘晓光
Owner CHINA PETROLEUM & CHEM CORP