CN102093504A - High molecular weight salt-resistance and temperature-resistance biopolymer oil displacement agent and preparation method thereof - Google Patents
High molecular weight salt-resistance and temperature-resistance biopolymer oil displacement agent and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a preparation method of a high molecular weight salt-resistance and temperature-resistance biopolymer oil displacement agent. In the method, acrylamide and a functional monomer are used as polymerizing monomers, mixed liquid of ethanol and water is used as a reaction solvent, polymerization is performed by dispersion polymerization in the presence of an initiator and a dispersing agent, and the finished product is obtained by centrifugal and drying. The preparation method disclosed by the invention is simple, and the prepared oil displacement agent has high salt resistance and temperature resistance and has the advantages of high molecular weight, fewer impurities, instant dissolution and the like.
Description
One, technical field
The present invention relates to a kind of preparation method of macromolecule oil-displacing agent, specifically a kind of preparation method of macromolecule anti-salt temperature-resistant binary polymer oil-displacing agent.
Two, background technology
Aqueous solution polymerization be polyacrylamide oil-displacing agent suitability for industrialized production main also be the method that early adopts.This kind method is solvent with water, and system is pure, and polymerization technique is simple, grasps easily.Because above-mentioned plurality of advantages, aqueous solution polymerization technology is still extensively adopted by people so far, is the main polymerization process of acrylamide monomer.But along with polyacrylamide (PAM) is used constantly popularization, the PAM weak point of aqueous solution polymerization preparation also day by day comes out, and mainly has following shortcoming:
1, process cost height, one-time investment is big in the production process;
2, product easily produces water-insoluble in the drying process;
3, easily produce dust in the shattering process, to the healthy generation harm of operator;
4, product exists dissolving slowly in industrial use, length consuming time.And molecular chain can be degraded under high mechanical stirring shearing action.Particularly dissolving is slower under high salinity and low temperature environment, therefore the special dry powder dissolver of essential in advance outfit.
Three, summary of the invention
The present invention is for fear of above-mentioned the deficiencies in the prior art part, provides that a kind of molecular weight is big, impurity is few, the preparation method of the instant and simple macromolecule anti-salt temperature-resistant of preparation method binary polymer oil-displacing agent.
The present invention adopts dispersion copolymerization method to prepare acrylamide-sodium p styrene sulfonate multipolymer (P (AM-SSS)) and acrylamide-styrol copolymer (P (AM-St)).
Dispersion polymerization is a kind of novel polymeric method that is at first put forward in early 1970s by Britain ICI company, the feature of this kind polymerization methods is to be homogeneous system before the reaction beginning, monomer, dispersion agent and initiator all are dissolved in the medium, then the polymkeric substance of Sheng Chenging but is insoluble to reaction medium, the polymer particle that the back is generated by means of the sterically hindered effect of dispersion agent, little crosslinked action or coulombic interaction stably is scattered in the medium, this polymerization process just is defined as dispersion polymerization, and the precipitation polymerization that is called specific type is also arranged.
Solution polymerization and letex polymerization two specific characters are had both in dispersion polymerization, and technology is simple and can prepare the polymer microballoon of small particle size, macromolecule, so product has instantly-soluble.Simultaneously diffuse-aggregate product is to separate by high speed centrifugation, and repeatedly elution of solvent is arranged therebetween, product with respect to solution polymerization dry purer, faster.
Technical solution problem of the present invention adopts following technical scheme:
The preparation method's of a kind of macromolecule anti-salt temperature-resistant of the present invention binary polymer oil-displacing agent characteristics are: with acrylamide and function monomer is polymerization single polymerization monomer, with the alcohol-water mixture is reaction solvent, in the presence of initiator and dispersion agent, by diffuse-aggregate mode polymerization, obtain finished product after centrifugal, the drying.
The preparation method's of a kind of macromolecule anti-salt temperature-resistant of the present invention binary polymer oil-displacing agent characteristics also are to operate according to the following steps:
Join acrylamide, function monomer and dispersion agent in the alcohol-water mixture and stir, in nitrogen atmosphere, add initiator, in 70-75 ℃ of stirring reaction 6-7 hour, then centrifugation remove desolvate insolubles, with dehydrated alcohol elution insolubles, in 50 ℃ of vacuum-dryings 4 hours, the powder that final powder is broken to particle diameter 2-5nm got product again.
The add-on of described acrylamide is the 10-25% of described alcohol-water mixture quality, and the add-on of described function monomer is the 10-15% of described acrylamide quality.
The preparation method's of a kind of macromolecule anti-salt temperature-resistant of the present invention binary polymer oil-displacing agent characteristics also are: described function monomer is sulfonic group water-soluble monomer or hydrophobic monomer.
The preparation method's of a kind of macromolecule anti-salt temperature-resistant of the present invention binary polymer oil-displacing agent characteristics also are: described function monomer is sodium p styrene sulfonate or vinylbenzene.
The preparation method's of a kind of macromolecule anti-salt temperature-resistant of the present invention binary polymer oil-displacing agent characteristics also are: described alcohol-water mixture is the trimethyl carbinol aqueous solution of concentration expressed in percentage by volume 70-75% or the aqueous ethanolic solution of concentration expressed in percentage by volume 70-75%.
The preparation method's of a kind of macromolecule anti-salt temperature-resistant of the present invention binary polymer oil-displacing agent characteristics also are: described dispersion agent is polyvinylpyrrolidone or polyvinyl alcohol, and add-on is the 4-6% of polymerization single polymerization monomer quality.
The preparation method's of a kind of macromolecule anti-salt temperature-resistant of the present invention binary polymer oil-displacing agent characteristics also are: described initiator is water-soluble peroxide initiator or azo-initiator, and add-on is the 0.25-0.30% of polymerization single polymerization monomer quality.
The preparation method's of a kind of macromolecule anti-salt temperature-resistant of the present invention binary polymer oil-displacing agent characteristics also are: described initiator is Potassium Persulphate or 2, two (the 2-amidine azoles quinoline propane) hydrochlorides of 2-azo.
Acrylamide among the present invention (AM) is as follows with the polyreaction equation of sodium p styrene sulfonate (SSS):
Acrylamide among the present invention (AM) is as follows with the polyreaction equation of vinylbenzene (St):
Detection method:
1, molecular weight determination
Press the GB12005.3-1989 regulation, in 30 ℃ of 1mol/LNaCl solvents, measure P (AM-SSS) limiting viscosity with one point method, the formula that provides with GB/T12005.10-1992 calculates viscosity-average molecular weight
The molecular weight of general polymerization oil displacement agent is all more than ten million, and the polyacrylamide oil-displacing agent molecular weight of the present invention's preparation is at 2.5-3 10,000,000.
2, apparent viscosity is measured
Use LV-DV II+ type rotational viscosimeter to measure copolymer salt solution apparent viscosity down at 30 ℃ and 90 ℃
3, dissolution time is pressed GB2005.8-89 mensuration.
Compared with the prior art beneficial effect of the present invention is embodied in:
1, the present invention adopts diffuse-aggregate method, and the high polymer particle diameter for preparing is at 1-2nm, and the finished product powder particle diameter is more than 2nm, so can saboteur's chain in the shattering process, and molecular weight product is unaffected.
2, product post-processing stages of the present invention is centrifugal by supercentrifuge, and dehydrated alcohol repeatedly elution is made, so foreign matter content is few for the polyacrylamide of solution polymerization process production.
3, in the post-processing stages high speed centrifugation process of the present invention, moisture and polymkeric substance break away from substantially, and with respect to the polyacrylamide amine product that solution polymerization process is produced, this product need not high temperature dries for a long time, has reduced the probability of product thermal metamorphism.
4, the product of the present invention's preparation is to be formed by the particulate buildup of particle diameter at 1-2nm, and for other products, this product has instant characteristic, and is instant molten, need not to be equipped with special dry powder dissolver.
Four, Figure of description
Fig. 1 is the infrared spectrum of acrylamide-sodium p styrene sulfonate multipolymer (P (AM-SSS)) of preparing of the present invention.
Fig. 2 is the infrared spectrum of acrylamide-styrol copolymer (P (AM-St)) of preparing of the present invention.
Five, embodiment
Embodiment 1:
In enamel reaction still, add the 30L deionized water (electricity is led less than 2.00 μ s/cm) and the 70L trimethyl carbinol, stir and add the 1.1kg polyvinylpyrrolidone down, stir and slowly add 25kg acrylamide and 2.5kg sodium p styrene sulfonate after 20 minutes successively, stir 1-2 hour until treating the solution homogeneous transparent.
Feed high-purity nitrogen from the reactor bottom and carry out deoxygenation, logical nitrogen adds Potassium Persulphate 68.8g after 30 minutes, continues logical nitrogen, stops nitrogen after 15 minutes.Material is warming up to 75 ℃ in the still, and post polymerization finished in 6 hours.Afterwards through centrifugal remove desolvate insolubles, with dehydrated alcohol elution insolubles, after the repeated centrifugation, elution 3 times the white solid shaped polymer, in 50 ℃ of vacuum-dryings 4 hours, the powder that final powder is broken to particle diameter 2-5nm got product with polymkeric substance.
The molecular weight product of present embodiment preparation is 2.53 thousand ten thousand, and dissolution time is 45 minutes.With salinity is salts solution (distilled water, NaCl, the CaCl of 16000mg/L
2, MgCl
2The preparation total mineralization is the normal saline solution solution of 16000mg/L, wherein Ca
2+Be 2000mg/L, Mg
2+Be 1000mg/L, all the other are Na
+, Cl
-) and the oil-displacing agent for preparing of present embodiment be configured to the polymers soln that mass concentration is 1500mg/L, in 30,90 ℃ of polymer oil-displacing agent-hydrolysis-type POLYACRYLAMIDE FLOODING agent (HPAM) of surveying its solution apparent concentration down and contrasting the preparation of ortho-water solution polymerization process, every data are as shown in table 1:
Table 1P (AM-SSS), the apparent viscosity of 2 kinds of polymers solns of HPAM and the relation of temperature
Polymer concentration: 1500mg/L; Salts solution salinity: 16000mg/L η
a: apparent viscosity
Embodiment 2:
In enamel reaction still, add 30L deionized water (electricity is led less than 2.00 μ s/cm), add 75L ethanol again.Stirring adds the 1.41kg polyvinyl alcohol, stirs slowly to add 20kg acrylamide and 3.5kg vinylbenzene after 10 minutes successively, stirs 1-2 hour until treating the solution homogeneous transparent.
Feed high-purity nitrogen from the reactor bottom and carry out deoxygenation.Logical nitrogen added 70.5g 2 after 30 minutes, two (the 2-amidine azoles quinoline propane) hydrochlorides of 2-azo continue logical nitrogen, stop nitrogen after 15 minutes.Material is warming up to 70 ℃ in the still, and post polymerization finished in 7 hours.Afterwards through centrifugal remove desolvate insolubles, with dehydrated alcohol elution insolubles, after the repeated centrifugation, elution 2 times the white solid shaped polymer, in 50 ℃ of vacuum-dryings 4 hours, the powder that final powder is broken to particle diameter 2-5nm got product with polymkeric substance.
Detect product dissolution time 56 minutes, molecular weight is 2.87 thousand ten thousand, apparent viscosity is 26.4mpa.s.
The molecular weight product of present embodiment preparation is 2.87 thousand ten thousand, and dissolution time is 56 minutes.With salinity is salts solution (distilled water, NaCl, the CaCl of 16000mg/L
2, MgCl
2The preparation total mineralization is the normal saline solution solution of 16000mg/L, wherein Ca
2+Be 2000mg/L, Mg
2+Be 1000mg/L, all the other are Na
+, Cl
-) and the oil-displacing agent for preparing of present embodiment be configured to the polymers soln that mass concentration is 1500mg/L, in 30,90 ℃ of polymer oil-displacing agent-hydrolysis-type POLYACRYLAMIDE FLOODING agent (HPAM) of surveying its solution apparent concentration down and contrasting the preparation of ortho-water solution polymerization process, every data are as shown in table 2:
Table 2P (AM-St), the apparent viscosity of 2 kinds of polymers solns of HPAM and the relation of temperature
Polymer concentration: 1500mg/L; Salts solution salinity: 16000mg/L η
a: apparent viscosity
Embodiment 3:
In enamel reaction still, add 25L deionized water (electricity is led less than 2.00 μ s/cm), add the 75L trimethyl carbinol again.Stirring adds the 0.69kg polyvinylpyrrolidone, stirs slowly to add 10kg acrylamide and 1.5kg sodium p styrene sulfonate after 20 minutes successively, stirs 1-2 hour until treating the solution homogeneous transparent.
Feed high-purity nitrogen from the reactor bottom and carry out deoxygenation.Logical nitrogen added 2 after 30 minutes, and two (2-amidine azoles quinoline propane) the hydrochloride 34.5g of 2-azo continue logical nitrogen, stop nitrogen after 15 minutes.Material is warming up to 70 ℃ in the still, and post polymerization finished in 7 hours.Afterwards through centrifugal remove desolvate insolubles, with dehydrated alcohol elution insolubles, after the repeated centrifugation, elution 3 times the white solid shaped polymer, in 50 ℃ of vacuum-dryings 4 hours, the powder that final powder is broken to particle diameter 2-5nm got product with polymkeric substance.
The molecular weight product of present embodiment preparation is 2.63 thousand ten thousand, and dissolution time is 50 minutes, and is salts solution (distilled water, NaCl, the CaCl of 16000mg/L with salinity
2, MgCl
2The preparation total mineralization is the normal saline solution solution of 16000mg/L, wherein Ca
2+Be 2000mg/L, Mg
2+Be 1000mg/L, all the other are Na
+, Cl
-) and the oil-displacing agent for preparing of present embodiment be configured to the polymers soln that mass concentration is 1 500mg/L, survey its solution apparent concentration down in 30,90 ℃, and the polymer oil-displacing agent-hydrolysis-type POLYACRYLAMIDE FLOODING agent (HPAM) of contrast ortho-water solution polymerization process preparation, every data are as shown in table 3:
Table 3P (AM-SSS), the apparent viscosity of 2 kinds of polymers solns of HPAM and the relation of temperature
Polymer concentration: 1 500mg/L; Salts solution salinity: 16 000mg/L η
a: apparent viscosity
Under the same salinity, the apparent viscosity of self-control product solution is higher than the apparent viscosity of general polymer oil-displacing agent HPAM solution, and the raising of viscosity has shown that the self-control product is being better than HPAM aspect the anti-salt; Under the same temperature, the apparent viscosity of self-control product solution also is higher than the apparent viscosity of general polymer oil-displacing agent HPAM solution, has shown that equally self-control P (AM-St) is better than HPAM aspect heatproof.
With the FTIR spectrogram of the MAGNA-IR750 of Nicolet company type Fourier transform infrared spectrometer mensuration product P (AM-SSS) and P (AM-St), see Fig. 1, Fig. 2.As can be seen from Figure 1,3370cm
-1The absorption peak at place belongs to NH
2The stretching vibration of N-H key in the group; 2885cm
-1The absorption peak at place belongs to the stretching vibration of saturated c h bond; 1668cm
-1The absorption peak at place belongs to the stretching vibration of C=O key in the amide group; 1499cm
-1The absorption peak at place belongs to the flexural vibration of c h bond in the methylene radical; 1160,1036cm
-1The absorption peak at place belongs to SO in the arylsulphonate
2The stretching vibration of-O key; At 828cm
-1The place has occurred in the phenyl ring 1, the dibasic charateristic avsorption band of 4-; 697cm
-1The absorption peak at place belongs to the rocking vibration of a plurality of methylene radical.The characterization result of FTIR shows that the synthetic product is P (AM-SSS).
As can be seen from Figure 2,3321cm
-1Place's absorption peak belongs to NH
2The stretching vibration 2927cm of N-H key in the group
-1Place's absorption peak belongs to the stretching vibration of saturated c h bond; 1689cm
-1Absorption peak belongs to the stretching vibration of C=O key in the amide group; 1600cm
-1Absorption peak belongs to the phenyl ring stretching vibration; 1453cm
-1Place's absorption peak belongs to the formation vibration absorption peak of methylene radical; 1316cm
-1Absorption peak belongs to the C-H formation vibration; 1120cm
-1Place's absorption peak belongs to the C-C skeletal vibration.The characterization result of FTIR shows that the synthetic product is P (AM-St).
Claims (8)
1. the preparation method of a macromolecule anti-salt temperature-resistant binary polymer oil-displacing agent, it is characterized in that: with acrylamide and function monomer is polymerization single polymerization monomer, with the alcohol-water mixture is reaction solvent, in the presence of initiator and dispersion agent, by diffuse-aggregate mode polymerization, obtain finished product after centrifugal, the drying.
2. preparation method according to claim 1 is characterized in that operating according to the following steps:
Join acrylamide, function monomer and dispersion agent in the alcohol-water mixture and stir, in nitrogen atmosphere, add initiator, in 70-75 ℃ of stirring reaction 6-7 hour, then centrifugation remove desolvate insolubles, with dehydrated alcohol elution insolubles, in 50 ℃ of vacuum-dryings 4 hours, the powder that final powder is broken to particle diameter 2-5nm got product again.
The add-on of described acrylamide is the 10-25% of described alcohol-water mixture quality, and the add-on of described function monomer is the 10-15% of described acrylamide quality.
3. preparation method according to claim 1 and 2 is characterized in that: described function monomer is sulfonic group water-soluble monomer or hydrophobic monomer.
4. preparation method according to claim 3 is characterized in that: described function monomer is sodium p styrene sulfonate or vinylbenzene.
5. preparation method according to claim 1 and 2 is characterized in that: described alcohol-water mixture is the trimethyl carbinol aqueous solution of concentration expressed in percentage by volume 70-75% or the aqueous ethanolic solution of concentration expressed in percentage by volume 70-75%.
6. preparation method according to claim 1 and 2 is characterized in that: described dispersion agent is polyvinylpyrrolidone or polyvinyl alcohol, and add-on is the 4-6% of polymerization single polymerization monomer quality.
7. preparation method according to claim 1 and 2 is characterized in that: described initiator is water-soluble peroxide initiator or azo-initiator, and add-on is the 0.25-0.30% of polymerization single polymerization monomer quality.
8. preparation method according to claim 7 is characterized in that: described initiator is Potassium Persulphate or 2, two (the 2-amidine azoles quinoline propane) hydrochlorides of 2-azo.
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| CN104193868A (en) * | 2014-09-02 | 2014-12-10 | 湖南理工学院 | Method and process for preparing polyacrylamide polymers with controllable grain sizes, molecular weights and molecular amount distribution |
| CN104231161A (en) * | 2013-06-14 | 2014-12-24 | 中国石油化工股份有限公司 | Temperature-resistance salt-resistance oil-displacement terpolymer and preparation method thereof |
| CN105524215A (en) * | 2014-10-24 | 2016-04-27 | 中国石油化工股份有限公司 | Heatproof salt-resistant acrylamide polymer microsphere dispersed system and preparation method and use thereof |
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| CN110387011A (en) * | 2019-06-06 | 2019-10-29 | 中国石油大学(北京) | A kind of nano combined oil displacement agent and its preparation method and application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752119A (en) * | 2005-10-21 | 2006-03-29 | 天津大学 | Method of preparing single dispersed polyacrylamide microsphere |
-
2011
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752119A (en) * | 2005-10-21 | 2006-03-29 | 天津大学 | Method of preparing single dispersed polyacrylamide microsphere |
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| CN104231161A (en) * | 2013-06-14 | 2014-12-24 | 中国石油化工股份有限公司 | Temperature-resistance salt-resistance oil-displacement terpolymer and preparation method thereof |
| CN104231161B (en) * | 2013-06-14 | 2016-06-29 | 中国石油化工股份有限公司 | A kind of temperature-resistant anti-salt displacement of reservoir oil terpolymer and preparation method thereof |
| CN104193868A (en) * | 2014-09-02 | 2014-12-10 | 湖南理工学院 | Method and process for preparing polyacrylamide polymers with controllable grain sizes, molecular weights and molecular amount distribution |
| CN105524215A (en) * | 2014-10-24 | 2016-04-27 | 中国石油化工股份有限公司 | Heatproof salt-resistant acrylamide polymer microsphere dispersed system and preparation method and use thereof |
| CN105586025A (en) * | 2014-10-24 | 2016-05-18 | 中国石油化工股份有限公司 | High-temperature high-salinity oil reservoir polymer microsphere dispersed system modifying and flooding agent, and preparation method and application thereof |
| CN105524215B (en) * | 2014-10-24 | 2019-07-05 | 中国石油化工股份有限公司 | Temperature-resistant anti-salt acrylamide copolymer microballoon dispersion and its preparation method and application |
| CN105586025B (en) * | 2014-10-24 | 2020-01-03 | 中国石油化工股份有限公司 | High-temperature high-salinity reservoir polymer microsphere disperse system profile control and flooding agent and preparation method and application thereof |
| CN106279525A (en) * | 2016-08-08 | 2017-01-04 | 东营华力石油技术股份有限公司 | Tertiary oil recovery surface-active polymer oil displacement agent and preparation method thereof |
| CN109369841A (en) * | 2018-10-26 | 2019-02-22 | 天津大港油田滨港集团博弘石油化工有限公司 | A kind of multifunction surface active polyacrylamide and its synthetic method |
| CN110387011A (en) * | 2019-06-06 | 2019-10-29 | 中国石油大学(北京) | A kind of nano combined oil displacement agent and its preparation method and application |
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