CN113652215A - Nano active material, preparation method and application thereof - Google Patents
Nano active material, preparation method and application thereof Download PDFInfo
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- CN113652215A CN113652215A CN202110897920.8A CN202110897920A CN113652215A CN 113652215 A CN113652215 A CN 113652215A CN 202110897920 A CN202110897920 A CN 202110897920A CN 113652215 A CN113652215 A CN 113652215A
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- nano
- active material
- foam
- maleic acid
- modified montmorillonite
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- 239000011149 active material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000006260 foam Substances 0.000 claims abstract description 56
- 239000002086 nanomaterial Substances 0.000 claims abstract description 54
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical class O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 35
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 29
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims abstract description 29
- 239000011976 maleic acid Substances 0.000 claims abstract description 29
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000004094 surface-active agent Substances 0.000 claims abstract description 23
- 239000000178 monomer Substances 0.000 claims abstract description 22
- 238000005201 scrubbing Methods 0.000 claims abstract description 15
- 238000012986 modification Methods 0.000 claims abstract description 4
- 230000004048 modification Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 239000000243 solution Substances 0.000 claims description 34
- 239000006185 dispersion Substances 0.000 claims description 17
- 239000003999 initiator Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- IXOCGRPBILEGOX-UHFFFAOYSA-N 3-[3-(dodecanoylamino)propyl-dimethylazaniumyl]-2-hydroxypropane-1-sulfonate Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC(O)CS([O-])(=O)=O IXOCGRPBILEGOX-UHFFFAOYSA-N 0.000 claims description 8
- -1 alkyl allyl quaternary ammonium salt Chemical class 0.000 claims description 8
- 238000007865 diluting Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 150000003384 small molecules Chemical class 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000005457 ice water Substances 0.000 claims description 5
- 239000003345 natural gas Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 4
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical group C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims description 4
- 229960003237 betaine Drugs 0.000 claims description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N dimethylmethane Natural products CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 4
- 239000001294 propane Substances 0.000 claims description 4
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical compound CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 claims description 2
- FWFUWXVFYKCSQA-UHFFFAOYSA-M sodium;2-methyl-2-(prop-2-enoylamino)propane-1-sulfonate Chemical compound [Na+].[O-]S(=O)(=O)CC(C)(C)NC(=O)C=C FWFUWXVFYKCSQA-UHFFFAOYSA-M 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 17
- 238000005187 foaming Methods 0.000 abstract description 16
- 150000003839 salts Chemical class 0.000 abstract description 13
- 230000033558 biomineral tissue development Effects 0.000 abstract description 10
- 229920000642 polymer Polymers 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000006911 nucleation Effects 0.000 abstract description 3
- 238000010899 nucleation Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 239000008367 deionised water Substances 0.000 description 12
- 229910021641 deionized water Inorganic materials 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000012065 filter cake Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 238000011056 performance test Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- ACWKAVFAONSRKJ-UHFFFAOYSA-M hexadecyl-dimethyl-prop-2-enylazanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)CC=C ACWKAVFAONSRKJ-UHFFFAOYSA-M 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000009210 therapy by ultrasound Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- AVWKSSYTZYDQFG-UHFFFAOYSA-M dimethyl-octadecyl-prop-2-enylazanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CC=C AVWKSSYTZYDQFG-UHFFFAOYSA-M 0.000 description 2
- 239000013051 drainage agent Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000008398 formation water Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- JJFQHXBBKXGQGL-UHFFFAOYSA-N [Na].CC(C)(C)NC(=O)C=C Chemical compound [Na].CC(C)(C)NC(=O)C=C JJFQHXBBKXGQGL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The application discloses a nano active material, which is obtained by performing surface modification on organic modified montmorillonite by adopting maleic acid and a small molecular surfactant monomer. On one hand, the modified montmorillonite and the traditional polymer monomer are copolymerized to form a net structure under the theoretical guidance of 'nucleation effect' of the nano material, the inward curling of the molecular structure can be inhibited under the conditions of high temperature and high salt oil reservoir, the molecular chain of the polymer keeps the specific molecular structure in/among molecules, and the foaming and liquid carrying performances caused by degradation and curling of the molecular chain of the polymer are reduced by reducing the temperature and the mineralization degree. On the other hand, the salt resistance of the foam scrubbing agent under the condition of high salinity is improved by introducing the salt-resistant monomer. The foam discharging agent developed by the invention has the advantages of convenient raw material source, relatively simple preparation process, low cost and low energy consumption, and has the advantages of high foam discharging temperature, quick foam generation, large foam generation amount and long foam stabilizing time compared with the conventional foam discharging agent.
Description
Technical Field
The application relates to a nano active material, a preparation method and application thereof, belonging to the technical field of nano materials.
Background
In the middle and later stages of natural gas well development, the formation energy is reduced, and formation water enters a near wellbore area or a wellbore along with natural gas flow and is gathered at the near wellbore area or the wellbore area, so that flooding occurs to cause the yield of a gas well to be reduced. At present, in order to solve the problem that production of a gas well is influenced by formation water, a foam drainage gas production technology is adopted, namely, foam drainage agent is injected into a shaft, the foam drainage agent is mixed with accumulated liquid in the shaft, a large amount of low-density water-containing foam is generated under the stirring action of airflow, and the airflow brings the foam to the ground, so that the accumulated liquid in the shaft is reduced. In the natural gas exploitation technology, the foam drainage technology is increasingly generally concerned with the advantages of convenient construction, simple equipment, low cost, wide applicable well depth range, quick effect taking, no influence on normal production of gas wells and the like, and is one of the most economical and effective methods for draining accumulated liquid in wells, improving the yield of natural gas and prolonging the exploitation period of gas wells. Most of gas wells in China are symbiotic with oil, gas and water, accumulated liquid in the wells has certain mineralization degree, and the bottom temperature of the wells is generally above 90 ℃. Therefore, the developed temperature-resistant and salt-resistant foam scrubbing agent is economic and effective and has wide market prospect.
At present, the conventional foam-exhausting agent is generally suitable for formations below 80 ℃, the foaming capacity and stability of the foam-exhausting agent can be greatly reduced along with the increase of the ambient temperature, and particularly in the high-temperature formations above 100 ℃, foams generated by a plurality of foaming agents can be lost within 2min, and even no bubbles are generated. The existing high-temperature resistant foam scrubbing agent has the problems of large preparation energy consumption, complex process and high cost.
Disclosure of Invention
In order to solve the above problems, an aspect of the present invention is to provide a nano active material, which, on one hand, is guided by the "nucleation effect" of a nano material as a theory, and can inhibit the inward curling of a molecular structure under high-temperature and high-salinity reservoir conditions, so that a polymer molecular chain keeps a specific molecular structure in/between molecules, and the foaming and liquid-carrying properties caused by the degradation and curling of the polymer molecular chain due to temperature and mineralization are reduced, and on the other hand, the salt resistance of a foam scrubbing agent under high-salinity conditions is improved by introducing a salt-resistant monomer:
a nanometer active material is obtained by carrying out surface modification on organic modified montmorillonite by adopting maleic acid and a small molecular surfactant monomer; the organic modified montmorillonite nano material is obtained by reacting a montmorillonite nano material with gamma- (methacryloyloxy) propyl trimethoxy silane;
the small molecule surfactant monomer comprises long-chain alkyl allyl quaternary ammonium salt.
Optionally, the long chain alkyl allyl quaternary ammonium salt comprises at least one of hexadecyl dimethyl allyl ammonium chloride and octadecyl dimethyl allyl ammonium chloride.
Optionally, the small molecule surfactant further comprises sodium 2-acrylamido-2-methylpropanesulfonate as an anti-salt monomer.
Another aspect of the present invention is to provide a method for preparing the nano active material, the method comprising the steps of:
(a) reacting the montmorillonite nano material with gamma- (methacryloyloxy) propyl trimethoxy silane to obtain an organic modified montmorillonite nano material; dispersing organic modified montmorillonite nano material in water to obtain modified montmorillonite nano material dispersion liquid;
(b) mixing the modified montmorillonite nano-material dispersion liquid, a maleic acid solution, a small molecular surfactant monomer and water, deoxidizing, adding an initiator, and reacting to obtain the nano-active material.
Optionally, in the step (a), the montmorillonite nano-material, water and a gamma- (methacryloyloxy) propyl trimethoxy silane solution are reacted for 5-6 hours at the temperature of 50-70 ℃ to obtain a modified montmorillonite nano-material;
optionally, the mass fraction of the gamma- (methacryloyloxy) propyl trimethoxy silane solution is 25-35%.
Optionally, after the reaction in the step (a) is finished, filtering and washing are carried out, a filter cake is dried and then passes through a 300-mesh sieve, and the filter cake is dispersed in water to obtain a modified nano-material dispersion liquid;
optionally, in the step (a), the modified montmorillonite nano-material is added into water, stirred and ultrasonically dispersed to obtain a modified nano-material dispersion liquid;
optionally, the mass fraction of the organic modified nano material in the modified nano material dispersion liquid is 10-30%.
Optionally, the initiator comprises at least one of potassium persulfate or ammonium persulfate or combinations thereof;
optionally, in the step (b), at a temperature of 65-85 ℃, adding an initiator accounting for 0.1-0.5% of the total monomer mass, and reacting for 2-4 h to obtain a nano active material;
alternatively, the initiator is added in the following manner: continuously dripping initiator solution within 10-20 min;
alternatively, the initiator is added in the following manner: continuously dripping initiator solution within 15min
Optionally, the preparation method of the maleic acid solution comprises the following steps: diluting maleic acid with water, adding an alkali solution, and stirring in an ice-water bath to obtain a maleic acid solution; the mass fraction of maleic acid in the maleic acid solution is 15-35%, and the pH value is 6-8;
optionally, the oxygen removal in the step (b) is performed by introducing nitrogen for 20-30 min.
Optionally, in the step (b), 0.5-2.0 parts by weight of the modified nano material, 10-20 parts by weight of maleic acid and 2-10 parts by weight of the small molecule surfactant monomer are mixed in water;
optionally, in the step (b), 0.3-3.0 parts by weight of 30% modified montmorillonite nanomaterial aqueous dispersion, 15-30 parts by weight of 35% maleic acid aqueous solution, 5-15 parts by weight of long-chain alkyl allyl quaternary ammonium salt and 5-10 parts by weight of 2-acrylamido-2-methylpropane sodium sulfonate are mixed in 60-80 parts by weight of water.
As yet another aspect of the present application, the use of the nanoactive material as a foam evacuation agent.
The foam scrubbing agent comprises the nanometer active material and a surfactant.
Optionally, the surfactant is a betaine surfactant;
optionally, the betaine surfactant comprises at least one of lauramidopropyl hydroxysultaine and lauryldimethyl betaine;
optionally, the mass ratio of the nano active material to the surfactant in the foam scrubbing agent is 2-4: 1.
optionally, the mass ratio of the nano active material to the surfactant in the foam discharging agent is 3: 1.
the application also provides application of the foam scrubbing agent in natural gas production.
The invention can produce the beneficial effects that:
the invention selects montmorillonite as a nano substrate, and then carries out surface modification on the montmorillonite by using a functional monomer and a small molecular surface active monomer to obtain the active nano material. On one hand, the active nano material is guided by the 'nucleation effect' of the nano material as a theory, modified montmorillonite and the traditional polymer monomer are copolymerized to form a net structure, inward curling of the molecular structure can be inhibited under the conditions of high temperature and high salt oil reservoir, the polymer molecular chain keeps the specific molecular structure in/among molecules, and foaming and liquid carrying performances caused by degradation and curling of the polymer molecular chain by temperature and mineralization are reduced. On the other hand, the salt resistance of the foam scrubbing agent under the condition of high salinity is improved by introducing the salt-resistant monomer. The foam discharging agent developed by the invention has the advantages of convenient raw material source, relatively simple preparation process, low cost and low energy consumption, and has the advantages of high foam discharging temperature, quick foam generation, large foam generation amount and long foam stabilizing time compared with the conventional foam discharging agent.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
The raw materials in the examples of the present application were all purchased commercially, unless otherwise specified.
The equipment in the examples is as follows: the liquid carrying performance test is carried out by adopting a 2152 model Roche foam instrument of Shanghai Yinze company, and the airflow flow is 200L/min; adopting a GJ-3S type digital display high-speed mixer of Baileda corporation in Qingdao to evaluate the foaming performance of the sample; the oven for the experiment is a DHG-9075A type electric heating blowing drying oven produced by Shanghai-Hengscientific instruments Co.
The experimental methods used in the examples:
and (3) testing temperature resistance: selecting 20wNaCl +1wCaCl2·2H20, diluting the foam discharging agent to the same concentration (0.10 wt%) by using simulated saline, putting the diluted solution into an oven at the temperature of 95-115 ℃, and taking the test result of foaming performance and liquid carrying performance of the foam discharging agent after being placed for 3 days as an evaluation standard, wherein the test result is not lower than 90% of the original performance.
And (3) testing salt resistance: selecting 20wNaCl +1wCaCl2·2H20 simulated saline is used for diluting the foam discharging agent to the same concentration (0.10 wt%), the dispersion stability of the diluent is observed at normal temperature, and the evaluation standard is that the test result of the foaming performance and the liquid carrying performance of the foam discharging agent after being placed for 7 days is not lower than 90% of the original performance.
Foaming performance test: the foaming properties of the blowing agent were evaluated indoors with reference to standard SY/T6465-2000. Preparing the foam scrubbing agent into 100ml of solution with the concentration of 1000ppm, pouring the solution into a measuring cup, stirring for 1min, then quickly pouring foam into a 1000ml measuring cylinder, and recording the volume of the foam to represent the foaming capacity; the time required to separate half of the liquid (50ml) from the foam, i.e. the half-life of the foam, was recorded.
Liquid carrying performance test: the liquid carrying ability of the foaming agent was evaluated indoors with reference to SY/T6465-2000 standard. Preparing the foam scrubbing agent into 200ml of solution with the concentration of 1000ppm, placing the solution into a foaming tube of a Roche foam instrument after a water bath kettle and the Roche foam instrument are heated to 60 ℃, introducing air from the lower end of the foaming tube, measuring the total volume of liquid flowing out of the top end of the foaming tube after 15min, and calculating the liquid carrying rate.
Example 1:
the preparation method of the nano active material comprises the following steps:
step (1), adding 50ml of deionized water and 5g of montmorillonite nano material into a single-neck flask, adding 10ml of prehydrolyzed gamma- (methacryloyloxy) propyl trimethoxy silane aqueous solution with the mass fraction of 30%, reacting the system at 60 ℃ for 5 hours, filtering and repeatedly washing the system after reaction, drying the obtained filter cake at 105 ℃, and grinding the filter cake through a 300-mesh sieve to obtain the organic modified montmorillonite nano material.
And (2) weighing 3g of the organic modified montmorillonite nano material obtained in the step (1) in a 50ml beaker, dissolving the organic modified montmorillonite nano material in 17ml of deionized water, magnetically stirring for 20min, and then putting the beaker into an ultrasonic instrument for ultrasonic treatment for 40s to obtain modified montmorillonite nano material dispersion liquid.
And (3) adding 20g of maleic acid into a glass beaker, diluting with 40ml of deionized water, adding 30ml of 60 mass percent NaOH aqueous solution, stirring in an ice-water bath, and adjusting the pH value to 6-8 to obtain a maleic acid solution.
And (4) taking 2ml of the modified montmorillonite nano-material dispersion liquid obtained in the step (2), 35ml of the maleic acid monomer aqueous solution obtained in the step (3), 8g of hexadecyl dimethyl allyl ammonium chloride, 5g of 2-acrylamide-2-methyl sodium propane sulfonate and 70g of deionized water, sequentially adding the mixture into a 3-neck flask, and fully stirring to completely dissolve all the components.
And (5) introducing nitrogen into the reaction system in the step (4) for 20min to remove oxygen in the solution, dropping 10ml of 1% potassium persulfate solution at constant speed within 15min at a constant temperature of 80 ℃, and reacting for 3h to obtain the nano active material.
Example 2:
the preparation method of the water-soluble nano material comprises the following steps:
step (1), adding 50ml of deionized water and 5g of montmorillonite nano material into a single-neck flask, adding 10ml of prehydrolyzed gamma- (methacryloyloxy) propyl trimethoxy silane aqueous solution with the mass fraction of 30%, reacting the system at 60 ℃ for 5 hours, filtering and repeatedly washing the system after reaction, drying the obtained filter cake at 105 ℃, and grinding the filter cake through a 300-mesh sieve to obtain the organic modified montmorillonite nano material.
And (2) weighing 3g of the organic modified montmorillonite nano material obtained in the step (1) in a 50ml beaker, dissolving the organic modified montmorillonite nano material in 17ml of deionized water, magnetically stirring for 30min, and then putting the organic modified montmorillonite nano material into an ultrasonic instrument for ultrasonic treatment for 20s to obtain a modified montmorillonite nano material dispersion liquid.
And (3) adding 20g of maleic acid into a glass beaker, diluting with 40ml of deionized water, adding 30ml of 60 mass percent NaOH aqueous solution, stirring in an ice-water bath, and adjusting the pH value to 6-8 to obtain a maleic acid solution.
And (4) taking 2ml of the modified montmorillonite nano-material dispersion liquid obtained in the step (2), 35ml of the maleic acid monomer aqueous solution obtained in the step (3), 8g of octadecyl dimethyl allyl ammonium chloride, 5g of 2-acrylamide-2-methyl sodium propane sulfonate and 70g of deionized water, sequentially adding the mixture into a 3-neck flask, and fully stirring to completely dissolve all the components.
And (5) introducing nitrogen into the reaction system in the step (4) for 20min to remove oxygen in the solution, dropping 10ml of 1% potassium persulfate solution at constant speed within 15min at a constant temperature of 80 ℃, and reacting for 3h to obtain the nano active material.
Example 3:
the preparation method of the nano active material comprises the following steps:
step (1), adding 50ml of deionized water and 5g of montmorillonite nano material into a single-neck flask, adding 10ml of prehydrolyzed gamma- (methacryloyloxy) propyl trimethoxy silane aqueous solution with the mass fraction of 30%, reacting the system at 60 ℃ for 5 hours, filtering and repeatedly washing the system after reaction, drying the obtained filter cake at 105 ℃, and grinding the filter cake through a 300-mesh sieve to obtain the organic modified montmorillonite nano material.
And (2) weighing 3g of the organic modified montmorillonite nano material obtained in the step (1) in a 50ml beaker, dissolving the organic modified montmorillonite nano material in 17ml of deionized water, magnetically stirring for 20min, and then putting the beaker into an ultrasonic instrument for ultrasonic treatment for 40s to obtain modified montmorillonite nano material dispersion liquid.
And (3) adding 20g of maleic acid into a glass beaker, diluting with 40ml of deionized water, adding 30ml of 60 mass percent NaOH aqueous solution, stirring in an ice-water bath, and adjusting the pH value to 6-8 to obtain a maleic acid solution.
And (4) taking 2ml of the modified montmorillonite nano-material dispersion liquid obtained in the step (2), 35ml of the maleic acid monomer aqueous solution obtained in the step (3), 8g of hexadecyl dimethyl allyl ammonium chloride, 5g of 2-acrylamide-2-methyl sodium propane sulfonate and 70g of deionized water, sequentially adding the mixture into a 3-neck flask, and fully stirring to completely dissolve all the components.
And (5) introducing nitrogen into the reaction system in the step (4) for 20min to drive out oxygen in the solution, dropping 10ml of 1% ammonium persulfate solution at constant speed within 15min at a constant temperature of 80 ℃, and reacting for 3h to obtain the nano active material.
Example 4
The nano-active material obtained in example 1 and lauramidopropyl hydroxysultaine were formulated as a foam-drain. The preparation method comprises the following steps: the nano-active material obtained in example 1 and lauramidopropyl hydroxysultaine were mixed in a mass ratio of 3: 1 preparing a solution with the mass concentration of 2 g/L.
The obtained foam scrubbing agent is subjected to temperature resistance, salt resistance, foaming performance and liquid carrying performance tests. The test result is that the temperature resistance test temperature of the foam discharging agent is 110 ℃, the foam discharging agent can resist mineralized water with the mineralization degree of 200000mg/L, the foam volume and the half-life period in the mineralized water with the mineralization degree of 200000mg/L are respectively 800ml and 10min, and the liquid carrying rate is 90%.
Example 5
The nano-active material obtained in example 2 and lauramidopropyl hydroxysultaine were formulated as a foam-drain. The preparation method comprises the following steps: mixing the nano-active material obtained in the example 2 and lauramidopropyl hydroxysultaine in a mass ratio of 3: 1 preparing a solution with the mass concentration of 2 g/L.
The obtained foam scrubbing agent is subjected to temperature resistance, salt resistance, foaming performance and liquid carrying performance tests. The test result is that the temperature resistance test temperature of the foam discharging agent is 115 ℃, the foam discharging agent can resist mineralized water with the mineralization degree of 200000mg/L, the foam volume and the half-life period in the mineralized water with the mineralization degree of 200000mg/L are respectively 850ml and 12min, and the liquid carrying rate is 93%.
Example 6
The nano-active material obtained in example 3 and lauramidopropyl hydroxysultaine were formulated as a foam-drain. The preparation method comprises the following steps: mixing the nano-active material obtained in the example 3 and lauramidopropyl hydroxysultaine in a mass ratio of 3: 1 preparing a solution with the mass concentration of 2 g/L.
The obtained foam scrubbing agent is subjected to temperature resistance, salt resistance, foaming performance and liquid carrying performance tests. The test result is that the temperature resistance test temperature of the foam discharging agent is 95 ℃, the foam discharging agent can resist mineralized water with the mineralization degree of 200000mg/L, the foam volume and the half-life period in the mineralized water with the mineralization degree of 200000mg/L are respectively 720ml and 8min, and the liquid carrying rate is 93%.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (10)
1. The nano active material is characterized in that the nano active material is obtained by performing surface modification on organic modified montmorillonite by adopting maleic acid and a small molecular surfactant monomer;
the organic modified montmorillonite is obtained by reacting montmorillonite nano material with gamma- (methacryloyloxy) propyl trimethoxy silane;
the small molecule surfactant monomer comprises alkyl allyl quaternary ammonium salt.
2. The nano-active material of claim 1, wherein the quaternary alkyl allyl ammonium salt comprises at least one of cetyl dimethyl allyl ammonium chloride and stearyl dimethyl allyl ammonium chloride.
3. The nano-active material according to claim 1, wherein the small molecule surfactant further comprises sodium 2-acrylamido-2-methylpropanesulfonate.
4. A method for preparing a nano-active material according to any one of claims 1 to 3, comprising the steps of:
(a) reacting the montmorillonite nano material with gamma- (methacryloyloxy) propyl trimethoxy silane to obtain an organic modified montmorillonite nano material; dispersing organic modified montmorillonite nano material in water to obtain modified montmorillonite nano material dispersion liquid;
(b) mixing the modified montmorillonite nano-material dispersion liquid, a maleic acid solution with the pH value of 6-8, a small molecular surfactant monomer and water, deoxidizing, adding an initiator, and reacting to obtain the nano-active material.
5. The preparation method according to claim 4, wherein in the step (a), the montmorillonite nanomaterial, water and a gamma- (methacryloyloxy) propyltrimethoxysilane solution are reacted at the temperature of 50-70 ℃ for 5-6 h to obtain an organic modified montmorillonite nanomaterial;
preferably, the mass fraction of the gamma- (methacryloyloxy) propyl trimethoxy silane solution is 25-35%;
preferably, the mass fraction of the organic modified montmorillonite nano-material in the modified nano-material dispersion liquid is 10-30%.
6. The production method according to claim 4, wherein the initiator includes at least one of potassium persulfate or ammonium persulfate;
preferably, in the step (b), at the temperature of 65-85 ℃, an initiator is added to react for 2-4 hours to obtain a nano active material;
preferably, the mass of the initiator accounts for 0.1-0.5% of the total mass of the maleic acid and the small molecular surfactant monomer;
preferably, the initiator is added in the following manner: continuously dripping initiator solution within 10-20 min;
preferably, the preparation method of the maleic acid solution is as follows: diluting maleic acid with water, adding an alkali solution, and stirring in an ice-water bath to obtain a maleic acid solution; the mass fraction of maleic acid in the maleic acid solution is 15-35%;
preferably, the method for removing oxygen in the step (b) is to introduce nitrogen for 20-30 min.
7. The preparation method according to claim 4, wherein in the step (b), 0.5-2.0 parts by weight of the modified nanomaterial, 10-20 parts by weight of maleic acid, and 2-10 parts by weight of the small molecule surfactant monomer are mixed in water;
in the step (b), 0.3-3.0 parts by weight of 30 wt% modified montmorillonite nano-material dispersion liquid, 15-30 parts by weight of 35 wt% maleic acid aqueous solution, 5-15 parts by weight of long-chain alkyl allyl quaternary ammonium salt and 5-10 parts by weight of 2-acrylamido-2-methyl sodium propane sulfonate are mixed in 60-80 parts by weight of water.
8. An intumescent agent, characterized in that the intumescent agent comprises a nano-active material and a surfactant, wherein the nano-active material is the nano-active material as claimed in any one of claims 1 to 3 or the nano-active material prepared by the method as claimed in any one of claims 4 to 8.
9. The foam scrubbing agent as claimed in claim 8, wherein said surfactant is a betaine surfactant;
the betaine surfactant comprises at least one of lauramidopropyl hydroxysultaine and dodecyl dimethyl betaine;
the mass ratio of the nano active material to the surfactant in the foam scrubbing agent is 2-4: 1.
10. use of the foam-eliminators according to claims 8-9 in the production of natural gas.
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