Salt-thickened water-soluble branched polymer as well as preparation method and application thereof

A branched polymer, water-soluble technology, used in chemical instruments and methods, drilling compositions, etc., can solve problems such as limited improvement ability, and achieve the effect of stable product performance and high shear resistance.

Active Publication Date: 2014-07-16
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, on the basis of linear polyacrylamide, copolymerization of functional

Method used

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  • Salt-thickened water-soluble branched polymer as well as preparation method and application thereof
  • Salt-thickened water-soluble branched polymer as well as preparation method and application thereof
  • Salt-thickened water-soluble branched polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0065] Example 1. Preparation of salt-thickened water-soluble branched polymer

[0066] (1) Preparation of zwitterionic monomers: 12g of 4-vinylpyridine and 10g of 13-propane sultone are prepared by ring-opening polymerization under the action of 2g of hydrochloric acid at a reaction temperature of 80°C and a reaction time of 8 hours (Formula I);

[0067] (2) Dissolve 71gAM and 12gVPPS in 400g H 2 O, mechanical stirring, pass condensate water, pass in N 2 ; Raise temperature to 45℃, inject CeCl 3 30mg, react for 1.5 hours;

[0068] (2) Inject 5.4mg HPG and add 30mg CeCl 3 , React for 1.5 hours, and keep at 45℃;

[0069] (3) Add 2g AM and 1g VPPS, add 2g fluorocarbon amphiphilic surfactant, and react for 1.5 hours;

[0070] (4) Place the reactor in an oven at 80°C for 4 hours.

[0071] (5) Take out the reactor and add 16.0g NaOH to it, pass the condensed water, mechanically stir, and hydrolyze at 140℃ for 2 hours.

[0072] The hydrogen NMR spectrum of the salt-thickened water-soluble branc...

Example Embodiment

[0075] Example 2. Preparation of salt-thickened water-soluble branched polymer

[0076] (1) Preparation of zwitterionic monomers: 14g vinyl pyridine and 14g 1,3-propane sultone are prepared by ring-opening polymerization under the action of 4g hydrochloric acid, reaction temperature 90℃, reaction time 6 hours;

[0077] (2) Dissolve 68gAM and 16gVPPS in 390g H 2 O, mechanical stirring, pass condensate water, pass in N 2 ; Heat up to 50℃, inject CeCl 3 40mg, react for 2 hours;

[0078] (3) Inject 5.0mg HPG and add 40mg CeCl 3 , React for 2 hours and keep at 50℃;

[0079] (4) Add 3g AM and 1.5g VPPS, add 3g fluorocarbon amphiphilic surfactant, and react for 2 hours;

[0080] (5) Place the reactor in an oven at 90°C for 6 hours.

[0081] (6) Take out the reactor and add 16.8g NaOH into it, pass the condensed water, mechanically stir, and hydrolyze at 120°C for 4 hours.

[0082] The hydrogen nuclear magnetic resonance spectrum of the water-soluble branched polymer prepared in this example and ...

Example Embodiment

[0085] Example 3. Preparation of salt-thickened water-soluble branched polymer

[0086] (1) Preparation of zwitterionic monomers: 16g vinyl pyridine and 14g 1,3-propane sultone are prepared by ring-opening polymerization under the action of 4g hydrochloric acid, reaction temperature 90℃, reaction time 7 hours;

[0087] (2) Dissolve 72gAM and 14g VPPS in 400g H 2 O, mechanical stirring, pass condensate water, pass in N 2 ; Raise the temperature to 48℃ and inject CeCl 3 35mg, react for 2 hours;

[0088] (3) Inject 6.0mg HPG and supplement 35mg CeCl 3 , React for 1.5 hours, and keep at 48℃;

[0089] (4) Add 2.5gAM1.25gVPPS, add 2.5g fluorocarbon amphiphilic surfactant, and react for 1.5 hours;

[0090] (5) Place the reactor in an oven at 85°C for 5 hours.

[0091] (6) Take out the reactor and add 17g NaOH to it, pass the condensed water, mechanically stir, and hydrolyze at 130°C for 3 hours.

[0092] The hydrogen nuclear magnetic resonance spectrum of the water-soluble branched polymer prepa...

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Abstract

The invention discloses a salt-thickened water-soluble branched polymer and a preparation method thereof. The preparation method comprises the following steps: (1) in the presence of hydrochloric acid, carrying out ring-opening reaction on 4-vinyl pyridine and 1,3-propane suhone to obtain a monomer containing zwitter-ion; (2) dissolving acrylamide and the monomer containing zwitter-ion in water and adding cerate for reaction; (3) adding hydroxyl terminated polyether ester polyalcohol and cerate in the reaction system in the step (2) and reacting; (4) adding acrylamide and fluorine-and-carbon-amphiphilic surfactant in the reaction system in the step (3) and reacting; and (5) putting the reaction system of the step (4) in a drying oven, then adding sodium hydroxide for hydrolysis reaction to generate the salt-thickened water-soluble branched polymer. According to the preparation method of the salt-thickened water-soluble branched polymer, 4-vinyl pyridine and 1,3-propane suhone are subjected to a ring-opening reaction in the presence of hydrochloric acid to obtain the monomer containing zwitter-ion; in addition, due to adoption of a postcuring and post-hydrolysis process, the prepared product has stable properties.

Description

technical field [0001] The invention relates to a salt-thickened water-soluble branched polymer, a preparation method and application thereof. Background technique [0002] Partially hydrolyzed polyacrylamide is a linear polymer and one of the most widely used varieties of water-soluble polymers. HPAM is a linear high molecular polymer. The industrial application of polymer flooding in oil fields has increased the demand for this product. At present, the most widely used is linear partially hydrolyzed polyacrylamide. With the increasingly harsh conditions of polymer flooding oilfields, the performance requirements of linear partially hydrolyzed polyacrylamide are getting higher and higher, especially the salt resistance and shear resistance. At present, on the basis of linear polyacrylamide, copolymerization of functional monomers is used to provide its performance, but the ability to improve is limited. Contents of the invention [0003] The object of the present inven...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F226/06C08F4/40C09K8/588
Inventor 吕鑫张健周永丰梁守成李强靖波唐恩高
Owner CHINA NAT OFFSHORE OIL CORP
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