CN103923254B - A kind of salt thickening type water-soluble branched polymer and preparation method thereof and application - Google Patents
A kind of salt thickening type water-soluble branched polymer and preparation method thereof and application Download PDFInfo
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Abstract
The invention discloses a kind of salt thickening type water-soluble branched polymer and preparation method thereof.Described preparation method comprises the steps: that (1) is under the effect of hydrochloric acid, 4-vinylpridine and PS, through ring-opening reaction, obtain containing zwitterionic monomer, (2) by acrylamide and soluble in water containing zwitterionic monomer, and add cerium salt and react; (3) in the reaction system of step (2), add end hydroxy polyether ester polyol and cerium salt, proceed reaction; (4) continue to add acrylamide and fluorine carbon amphiphilic surfactant in the reaction system of step (3), proceed reaction; (5) reaction system of step (4) is placed in baking oven; Then sodium hydroxide is added, through hydrolysis reaction and get final product.The present invention utilizes vinyl pyridine and PS to prepare containing zwitterionic monomer by ring-opening polymerization under hydrochloric acid effect; The preparation method of salt viscous water soluble branched polymer of the present invention, adopts after fixing, rear hydrolysis process, and product performance are stablized.
Description
Technical field
The present invention relates to a kind of salt thickening type water-soluble branched polymer and preparation method thereof and application.
Background technology
Partially hydrolyzed polyacrylamide is a kind of linear macromolecule polymkeric substance, is one of kind be most widely used in water-soluble high-molecular compound.HPAM is a kind of linear macromolecule polymkeric substance, and polymer flooding, in the industrial applications in oil field, increases the demand to this product.What current application was more is line style partially hydrolyzed polyacrylamide.Along with polymer flooding oil field condition is harsher, more and more higher to line style partially hydrolyzed polyacrylamide performance requriements, especially anti-salt property and anti-shear performance.On line style polyacrylamide base plinth, adopt the mode of copolymerizing functional monomers to provide its performance at present, but raising is limited in one's ability.
Summary of the invention
The object of this invention is to provide a kind of salt thickening type water-soluble branched polymer and preparation method thereof and application, while the present invention utilizes dissaving structure to replace traditional linear structure, introduce containing after zwitterionic monomer, obtain the water-soluble branched polymer with salt thickening characteristic; While improving polymkeric substance anti-shear ability, polymkeric substance is made to possess salt thickening characteristic.
The preparation method of a kind of salt thickening type water-soluble branched polymer provided by the present invention, comprises the steps:
(1) under the effect of hydrochloric acid, 4-vinylpridine and PS, through ring-opening reaction, obtain containing zwitterionic monomer, its structural formula such as formula shown in I,
Formula I
(2) by soluble in water containing zwitterionic monomer shown in acrylamide and formula I, and add cerium salt and react;
(3) in the reaction system of step (2), add end hydroxy polyether ester polyol and described cerium salt, proceed reaction;
(4) continue to add acrylamide and fluorine carbon amphiphilic surfactant in the reaction system of step (3), proceed reaction;
Described fluorine carbon amphiphilic surfactant is prepared by the following method:
1) full-fluorine octyl sulfuryl fluoride is dissolved in ethyl acetate, mixes with polyethylene polyamine, after heating, add sodium hydroxide or potassium hydroxide again, obtain two perfluorinated octyl sulfuryl amine after completion of the reaction;
2) described pair of perfluorinated octyl sulfuryl amine is mixed in organic solvent with ethylene chlorhydrin, then add sodium hydroxide or potassium hydroxide reacts, obtain N, the two perfluorinated octyl sulfuryl amine of N-ethanol;
3) two for described N, N-ethanol perfluorinated octyl sulfuryl amine is mixed with hydrogen peroxide, then add sodium hydroxide or potassium hydroxide reacts, obtain described fluorine carbon amphiphilic surfactant;
(5) reaction system of step (4) is placed in baking oven; Then add sodium hydroxide, namely obtain described salt thickening type water-soluble branched polymer through hydrolysis reaction.
In above-mentioned preparation method, in step (1), described cerium salt is CeCl
3, Ce(NO
3)
3and Ce
2(SO
4)
3middle at least one;
In step (2), the structural formula of described end hydroxy polyether ester polyol is such as formula shown in II:
Formula II.
In above-mentioned preparation method, in step (1), the mass ratio of described 4-vinylpridine, described PS and described hydrochloric acid can be 12 ~ 16:10 ~ 14:2 ~ 4, specifically can be 12:10:2,14:14:4,15:12:3 or 16:14:4;
The temperature of described reaction can be 80 ~ 90 DEG C, specifically can be 85 DEG C ~ 85 DEG C, 80 DEG C, 85 DEG C or 90 DEG C;
The time of described reaction can be 6 ~ 8 hours, specifically can be 6 hours, 7 hours or 8 hours.
In above-mentioned preparation method, in step (2), the mass ratio of the described vinyl pyridine added in the add-on of described acrylamide, described water and described cerium salt and step (1) can be 68 ~ 72:390 ~ 420:0.03 ~ 0.04:12 ~ 16, specifically can be 68:390:0.04:14,69:400:0.03:15,71:400:0.03:12 or 72:400:0.035:16;
The temperature of described reaction can be 45 DEG C ~ 50 DEG C, specifically can be 45 DEG C ~ 48 DEG C, 45 DEG C, 48 DEG C or 50 DEG C;
The time of described reaction can be 1.5 hours ~ 2.0 hours, specifically can be 1.5 hours or 2.0 hours.
In above-mentioned preparation method, in step (3), the mass ratio of the described vinyl pyridine added in the add-on of described end hydroxy polyether ester polyol and described cerium salt and step (1) can be 0.005 ~ 0.006:0.03 ~ 0.04:12 ~ 16, specifically can be 0.005:0.04:14,0.005:0.04:15,0.0054:0.03:12 or 0.006:0.035:72;
The temperature of described reaction can be 45 DEG C ~ 50 DEG C, specifically can be 45 DEG C ~ 48 DEG C, 45 DEG C, 48 DEG C or 50 DEG C;
The time of described reaction can be 1.5 hours ~ 2.0 hours, specifically can be 1.5 hours or 2.0 hours.
In above-mentioned preparation method, in step (4), can be 2 ~ 3:2 ~ 3:2 ~ 3:12 ~ 16 containing the mass ratio of the described vinyl pyridine added in the add-on of zwitterionic monomer and described fluorine carbon amphiphilic surfactant and step (1) shown in described acrylamide, formula I, specifically can be 2:1:2:12,3:1.5:3:14,2.5:1.25:2.5:16 or 2:1.4:2.75:15;
The temperature of described reaction can be 45 DEG C ~ 50 DEG C, specifically can be 45 DEG C ~ 48 DEG C, 45 DEG C, 48 DEG C or 50 DEG C;
The time of described reaction can be 1.5 hours ~ 2.0 hours, specifically can be 1.5 hours or 2.0 hours.
Preparing described fluorine carbon amphiphilic surfactant method can see the record in Chinese invention patent 200910077705.2, and actual conditions is as follows:
In step 1), the mol ratio of sodium hydroxide or potassium hydroxide and described full-fluorine octyl sulfuryl fluoride can be 0.05 ~ 0.1:0.8 ~ 2.0;
The finishing temperature of heating steps is 70 DEG C ~ 80 DEG C, and the reaction times is 6 ~ 8 hours;
Described polyethylene polyamine specifically can be at least one in 1,3-propylene diamine, quadrol, Putriscine and triethylene tetramine;
Step 2) in, the mol ratio of sodium hydroxide or potassium hydroxide and ethylene chlorhydrin can be 0.05 ~ 0.1:0.8 ~ 2.0;
The temperature of described reaction is 70 DEG C ~ 80 DEG C, and the reaction times is 6 ~ 8 hours;
In step 3), the mol ratio of sodium hydroxide or potassium hydroxide and hydrogen peroxide can be 0.05 ~ 0.1:0.8 ~ 2.0;
The temperature of described reaction is 70 DEG C ~ 80 DEG C, and the reaction times is 2 ~ 4 hours;
Step 1) is in step 3), and the mol ratio of full-fluorine octyl sulfuryl fluoride, polyethylene polyamine, ethylene chlorhydrin and hydrogen peroxide can be 2 ~ 2.5:0.8 ~ 1.0:2 ~ 2.5:2 ~ 2.5.
In above-mentioned preparation method, in step (5), the temperature of described baking oven can be 80 DEG C ~ 90 DEG C, and the time being placed in described baking oven is 4 hours ~ 6 hours;
The mass ratio of the described vinyl pyridine added in the add-on of described sodium hydroxide and step (1) can be 16 ~ 18:12 ~ 16, specifically can be 16:15,16.8:14,17:16 or 16:12;
The temperature of described hydrolysis reaction can be 120 DEG C ~ 140 DEG C, specifically can be 120 DEG C, 130 DEG C or 140 DEG C;
The time of described hydrolysis reaction can be 2 hours ~ 4 hours, specifically can be 2 hours, 3 hours or 4 hours.
Invention further provides the salt thickening type water-soluble branched polymer prepared by aforesaid method.
Salt thickening type water-soluble branched polymer prepared by the present invention can be used for preparing oil-displacing agent.
Present invention also offers a kind of oil-displacing agent, it comprises described salt thickening type water-soluble branched polymer.
Salt thickening type water-soluble branched polymer provided by the invention and preparation method thereof, has following characteristics:
1) the present invention utilizes vinyl pyridine and PS to prepare containing zwitterionic monomer (VPPS) by ring-opening polymerization under hydrochloric acid effect;
2) the present invention utilizes cerium salt and terminal hydroxy group formation redox initiation system to prepare water-soluble ultrabranching polymkeric substance, then directly carry out radical copolymerization that is acrylamide triggered and VPPS, obtain salt thickening type water-soluble ultrabranching multi-arm multipolymer and possess dissaving structure.
3) preparation method of salt viscous water soluble branched polymer provided by the invention, adopts after fixing, rear hydrolysis process, and product performance are stablized.
4) salt thickening type water-soluble branched polymer provided by the invention has higher anti-shear performance than the common hydro-polyacrylamide of line style, possesses salt thickening characteristic simultaneously.
Accompanying drawing explanation
Fig. 1 is the infrared absorption spectra of salt thickening type water-soluble branched polymer prepared by the embodiment of the present invention 1.
Fig. 2 is the dense curve of salt of salt thickening type water-soluble branched polymer shearing front and back prepared by the embodiment of the present invention 1.
Fig. 3 is the dense curve of salt of salt thickening type water-soluble branched polymer shearing front and back prepared by the embodiment of the present invention 2.
Fig. 4 is the dense curve of salt of salt thickening type water-soluble branched polymer shearing front and back prepared by the embodiment of the present invention 3.
Fig. 5 is the dense curve of salt of salt thickening type water-soluble branched polymer shearing front and back prepared by the embodiment of the present invention 4.
Embodiment
The experimental technique used in following embodiment if no special instructions, is ordinary method.
Material used in following embodiment, reagent etc., if no special instructions, all can obtain from commercial channels.
The fluorine carbon amphiphilic surfactant used in following embodiment is that the method recorded according to Chinese invention patent (patent No.: ZL200910077705.2) is prepared, and concrete preparation process is as follows:
1) by 100.4g(0.2mol) full-fluorine octyl sulfuryl fluoride is dissolved in ethyl acetate, and and 5.92g(0.08mol) 1,3-propylene diamine mixes, be heated to 70 DEG C, then add 1.12g(0.02mol) potassium hydroxide carries out reaction 8 hours under agitation; After drying, the aqueous sodium hydroxide solution being 1.0% by desciccate and mass percent concentration mixes, extraction organism, obtains brown solid for two perfluorinated octyl sulfuryl amine after dewatering.
2) by 103.8g(0.1mol) two perfluorinated octyl sulfuryl amine and 16.1g(0.2mol) ethylene chlorhydrin mixes in ethanolic soln, add 0.56g(0.01mol again) potassium hydroxide, under 80 DEG C of agitation conditions, carry out reaction 8 hours, obtain the two perfluorinated octyl sulfuryl amine of N-N-ethanol;
3) by 112.6g(0.1mol) the two perfluorinated octyl sulfuryl amine of N, N-ethanol and 6.8g(0.2mol) hydrogen peroxide mix, then adds 0.56g(0.01mol) potassium hydroxide, lower 70 DEG C of agitation condition reacts 2 hours, obtains fluorine carbon amphiphilic surfactant.
End hydroxy polyether ester polyol (HPG) shown in the formula II used in following embodiment is that the method recorded according to Chinese patent application (96101119.X) is prepared.
Embodiment 1, prepare salt thickening type water-soluble branched polymer
(1) prepare containing zwitterionic monomer: 12g4-vinyl pyridine and 10g13-propane sultone are under the hydrochloric acid effect of 2g, and temperature of reaction 80 DEG C, 8 hours reaction times prepared VPPS(formula I by ring-opening polymerization);
(2) 71gAM and 12gVPPS is dissolved in 400gH
2o, mechanical stirring, logical water of condensation, passes into N
2; Be warming up to 45 DEG C, inject CeCl
330mg, reacts 1.5 hours;
(2) inject 5.4mgHPG, add 30mgCeCl
3, react 1.5 hours, and be incubated 45 DEG C;
(3) add 2gAM and 1gVPPS, add the fluorine carbon amphiphilic surfactant of 2g, react 1.5 hours;
(4) reactor is placed in 80 DEG C of baking ovens to place 4 hours.
(5) take out reactor and add 16.0gNaOH wherein, logical water of condensation, mechanical stirring, is hydrolyzed 2 hours at 140 DEG C.
Salt thickening type water-soluble branched polymer hydrogen nuclear magnetic resonance spectrogram prepared by the present embodiment as shown in Figure 1, as can be seen from this figure, position hydrogen between on peak c (δ=7.8) corresponding pyridine groups; Ortho-hydrogens on peak d (δ=8.6) corresponding pyridine groups; Hydrogen on peak e and h (δ=4.6) methylene radical that corresponding pyridine nitrogen is adjacent respectively and the hydrogen on acid amides amino, nuclear-magnetism result proves successfully to introduce VPPS unit in the polymer, has prepared HPG-star-P (AM-co-VPPS).In addition contrast the nuclear magnetic spectrogram of this polymkeric substance and monomer VPPS, discovery chemical shift disappears substantially in the proton peak of about 6.0, shows that the double bond of VPPS take part in polyaddition reaction substantially, thus achieves grafting.
The cutting performance evaluation of salt thickening type water-soluble branched polymer prepared by the present embodiment, carries out with reference to " displacement of reservoir oil Partially Hydrolyzed Polyacrylamide Solution method for testing performance " (Q/SY119-2005).
Fig. 1 is the dense curve of salt of salt thickening type water-soluble branched polymer shearing front and back prepared by the present embodiment, can be learnt by this figure, the viscosity retention ratio of this salt thickening type water-soluble branched polymer before and after shearing reaches 90 ~ 94%, salt thickening scope is at saltiness 3000 ~ 15000mg/L, and viscosity brings up to 68.2mPa.s from 29.5mPa.s.
Embodiment 2, prepare salt thickening type water-soluble branched polymer
(1) prepare containing zwitterionic monomer: 14g vinyl pyridine and 14g1,3-propane sultone under the hydrochloric acid effect of 4g, temperature of reaction 90 DEG C, 6 hours reaction times prepared VPPS by ring-opening polymerization;
(2) 68gAM and 16gVPPS is dissolved in 390gH
2o, mechanical stirring, logical water of condensation, passes into N
2; Be warming up to 50 DEG C, inject CeCl
340mg, reacts 2 hours;
(3) inject 5.0mgHPG, add 40mgCeCl
3, react 2 hours, and be incubated 50 DEG C;
(4) add 3gAM and 1.5gVPPS, add the fluorine carbon amphiphilic surfactant of 3g, react 2 hours;
(5) reactor is placed in 90 DEG C of baking ovens to place 6 hours.
(6) take out reactor and add 16.8gNaOH wherein, logical water of condensation, mechanical stirring, is hydrolyzed 4 hours at 120 DEG C.
Water-soluble branched polymer hydrogen nuclear magnetic resonance spectrogram prepared by the present embodiment is similar to Fig. 1.
The cutting performance evaluation of salt thickening type water-soluble branched polymer prepared by the present embodiment, carries out with reference to " displacement of reservoir oil Partially Hydrolyzed Polyacrylamide Solution method for testing performance " (Q/SY119-2005).
Fig. 2 is the dense curve of salt of salt thickening type water-soluble branched polymer shearing front and back prepared by the present embodiment, can be learnt by this figure, the viscosity retention ratio of this salt thickening type water-soluble branched polymer before and after shearing reaches 90 ~ 96%, salt thickening scope is at saltiness 3000 ~ 15000mg/L, and viscosity brings up to 66.8mPa.s from 28.6mPa.s.
Embodiment 3, prepare salt thickening type water-soluble branched polymer
(1) prepare containing zwitterionic monomer: 16g vinyl pyridine and 14g1,3-propane sultone under the hydrochloric acid effect of 4g, temperature of reaction 90 DEG C, 7 hours reaction times prepared VPPS by ring-opening polymerization;
(2) 72gAM and 14gVPPS is dissolved in 400gH
2o, mechanical stirring, logical water of condensation, passes into N
2; Be warming up to 48 DEG C, inject CeCl
335mg, reacts 2 hours;
(3) inject 6.0mgHPG, add 35mgCeCl
3, react 1.5 hours, and be incubated 48 DEG C;
(4) add 2.5gAM1.25gVPPS, add the fluorine carbon amphiphilic surfactant of 2.5g, react 1.5 hours;
(5) reactor is placed in 85 DEG C of baking ovens to place 5 hours.
(6) take out reactor and add 17gNaOH wherein, logical water of condensation, mechanical stirring, is hydrolyzed 3 hours at 130 DEG C.
Water-soluble branched polymer hydrogen nuclear magnetic resonance spectrogram prepared by the present embodiment is similar to Fig. 1.
The cutting performance evaluation of salt thickening type water-soluble branched polymer prepared by the present embodiment, carries out with reference to " displacement of reservoir oil Partially Hydrolyzed Polyacrylamide Solution method for testing performance " (Q/SY119-2005).
Fig. 3 is the dense curve of salt of salt thickening type water-soluble branched polymer shearing front and back prepared by the present embodiment, can be learnt by this figure, the viscosity retention ratio of this salt thickening type water-soluble branched polymer before and after shearing reaches 90 ~ 97%, salt thickening scope is at saltiness 3000 ~ 15000mg/L, and viscosity brings up to 69.6mPa.s from 33.6mPa.s.
Embodiment 4, prepare water-soluble branched polymer
(1) prepare containing zwitterionic monomer: 15g vinyl pyridine and 12g1,3-propane sultone under the hydrochloric acid effect of 3g, temperature of reaction 85 DEG C, 7 hours reaction times prepared VPPS by ring-opening polymerization;
(2) 69gAM and 3gVPPS is dissolved in 400gH
2o, mechanical stirring, logical water of condensation, passes into N
2; Be warming up to 45 DEG C, inject CeCl
330mg, reacts 1.5 hours;
(3) inject 5.0mgHPG, add 40mgCeCl
3, react 2 hours, and be incubated 45 DEG C;
(4) add 2gAM and 1.4gVPPS, add the fluorine carbon amphiphilic surfactant of 2.75g, react 2 hours;
(5) reactor is placed in 80 DEG C of baking ovens to place 6 hours.
(6) take out reactor and add 16gNaOH wherein, logical water of condensation, mechanical stirring, is hydrolyzed 3 hours at 140 DEG C.
Water-soluble branched polymer hydrogen nuclear magnetic resonance spectrogram prepared by the present embodiment is similar to Fig. 1.
The cutting performance evaluation of salt thickening type water-soluble branched polymer prepared by the present embodiment, carries out with reference to " displacement of reservoir oil Partially Hydrolyzed Polyacrylamide Solution method for testing performance " (Q/SY119-2005).
Fig. 4 is the dense curve of salt of salt thickening type water-soluble branched polymer shearing front and back prepared by the present embodiment, can be learnt by this figure, the viscosity retention ratio of this salt thickening type water-soluble branched polymer before and after shearing reaches 91 ~ 96%, salt thickening scope is at saltiness 3000 ~ 15000mg/L, and viscosity brings up to 67.2mPa.s from 32.6mPa.s.
Claims (9)
1. a preparation method for salt thickening type water-soluble branched polymer, comprises the steps:
(1) under the effect of hydrochloric acid, 4-vinylpridine and PS, through ring-opening reaction, obtain containing zwitterionic monomer, its structural formula such as formula shown in I,
(2) by acrylamide and described soluble in water containing zwitterionic monomer, and add cerium salt and react;
Described cerium salt is CeCl
3, Ce (NO
3)
3and Ce
2(SO
4)
3middle at least one;
(3) in the reaction system of step (2), add end hydroxy polyether ester polyol and described cerium salt, proceed reaction;
The structural formula of described end hydroxy polyether ester polyol is such as formula shown in II:
(4) continue to add acrylamide and fluorine carbon amphiphilic surfactant in the reaction system of step (3), proceed reaction;
Described fluorine carbon amphiphilic surfactant is prepared by the following method:
1) full-fluorine octyl sulfuryl fluoride is dissolved in ethyl acetate, mixes with polyethylene polyamine, after heating, add sodium hydroxide or potassium hydroxide again, obtain two perfluorinated octyl sulfuryl amine after completion of the reaction;
2) described pair of perfluorinated octyl sulfuryl amine is mixed in organic solvent with ethylene chlorhydrin, then add sodium hydroxide or potassium hydroxide reacts, obtain N, the two perfluorinated octyl sulfuryl amine of N-ethanol;
3) two for described N, N-ethanol perfluorinated octyl sulfuryl amine is mixed with hydrogen peroxide, then add sodium hydroxide or potassium hydroxide reacts, obtain described fluorine carbon amphiphilic surfactant;
(5) reaction system of step (4) is placed in baking oven; Then add sodium hydroxide, namely obtain described salt thickening type water-soluble branched polymer through hydrolysis reaction.
2. preparation method according to claim 1, is characterized in that: in step (1), and the mass ratio of described vinyl pyridine, described PS and described hydrochloric acid is 12 ~ 16:10 ~ 14:2 ~ 4;
The temperature of described reaction is 80 ~ 90 DEG C;
The time of described reaction is 6 ~ 8 hours.
3. preparation method according to claim 1 and 2, it is characterized in that: in step (2), the mass ratio of the described vinyl pyridine added in the add-on of described acrylamide, described water and described cerium salt and step (1) is 68 ~ 72:390 ~ 420:0.03 ~ 0.04:12 ~ 16;
The temperature of described reaction is 45 DEG C ~ 50 DEG C;
The time of described reaction is 1.5 hours ~ 2.0 hours.
4. preparation method according to claim 1 and 2, it is characterized in that: in step (3), the mass ratio of the described vinyl pyridine added in the add-on of described end hydroxy polyether ester polyol and described cerium salt and step (1) is 0.005 ~ 0.006:0.03 ~ 0.04:12 ~ 16;
The temperature of described reaction is 45 DEG C ~ 50 DEG C;
The time of described reaction is 1.5 hours ~ 2.0 hours.
5. preparation method according to claim 1 and 2, it is characterized in that: in step (4), the mass ratio of the described vinyl pyridine added in the add-on of described acrylamide and described fluorine carbon amphiphilic surfactant and step (1) is 2 ~ 3:2 ~ 3:12 ~ 16;
The temperature of described reaction is 45 DEG C ~ 50 DEG C;
The time of described reaction is 1.5 hours ~ 2.0 hours.
6. preparation method according to claim 1 and 2, is characterized in that: in step (5), and the temperature of described baking oven is 80 DEG C ~ 90 DEG C, and the time being placed in described baking oven is 4 hours ~ 6 hours;
The mass ratio of the described vinyl pyridine added in the add-on of described sodium hydroxide and step (1) is 16 ~ 18:12 ~ 16;
The temperature of described hydrolysis reaction is 120 DEG C ~ 140 DEG C;
The time of described hydrolysis reaction is 2 hours ~ 4 hours.
7. the salt thickening type water-soluble branched polymer prepared of method according to any one of claim 1-6.
8. salt thickening type water-soluble branched polymer described in claim 7 is as the application in oil-displacing agent.
9. an oil-displacing agent, it comprises salt thickening type water-soluble branched polymer described in claim 7.
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| CN104877079B (en) * | 2015-05-18 | 2017-08-25 | 中国海洋石油总公司 | A kind of water-soluble ultrabranching multi-arm polyacrylamide polymer and preparation method thereof |
| CN106608945B (en) | 2015-10-21 | 2019-03-19 | 中国石油化工股份有限公司 | A kind of copolymerization associated matter and its preparation method and application and drilling fluid |
| CN106146748B (en) * | 2016-07-14 | 2018-05-18 | 中国海洋石油集团有限公司 | A kind of water-soluble fluorine-containing dissaving polymer thinner and preparation method thereof |
| CN107686534B (en) * | 2016-08-04 | 2020-04-07 | 中国石油化工股份有限公司 | Polymer with selective water plugging function and preparation method and application thereof |
| CN106632848B (en) * | 2016-12-23 | 2018-12-21 | 山东大学 | A kind of self-reparing capability is strong and the preparation method of the high hydrogel of conductivity |
| CN107033274B (en) * | 2017-03-31 | 2020-02-28 | 华东理工大学 | Zwitterionic copolymer film material and preparation method thereof |
| CN108219154A (en) * | 2018-01-03 | 2018-06-29 | 中国海洋石油集团有限公司 | A kind of hyperbranched pour point depressant for crude oil with internal salt structure and preparation method and application |
| CN108753268B (en) * | 2018-06-05 | 2020-09-22 | 中国石油集团长城钻探工程有限公司 | High-temperature-resistant intercalation adsorption inhibitor |
| CN111393570B (en) * | 2020-04-30 | 2022-05-24 | 中海石油(中国)有限公司 | Hyperbranched polyvinylpyrrolidone natural gas hydrate inhibitor with inner salt structure and preparation method and application thereof |
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