CN113278457B - Wax remover for rapid treatment of oil and gas fields and preparation method thereof - Google Patents
Wax remover for rapid treatment of oil and gas fields and preparation method thereof Download PDFInfo
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- CN113278457B CN113278457B CN202110722884.1A CN202110722884A CN113278457B CN 113278457 B CN113278457 B CN 113278457B CN 202110722884 A CN202110722884 A CN 202110722884A CN 113278457 B CN113278457 B CN 113278457B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/18—Use of additives to fuels or fires for particular purposes use of detergents or dispersants for purposes not provided for in groups C10L10/02 - C10L10/16
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Abstract
The invention provides a wax removing agent for rapid treatment of oil and gas fields and a preparation method thereof, wherein styrene, methacrylate, beta-carboxyethyl acrylate, methacrylic acid and acrylamide are mixed to prepare pre-emulsion; then adding a catalyst and an ammonium persulfate solution into the pre-emulsion, and stirring for reaction to obtain a pre-mixed solution; and finally, uniformly stirring the premixed solution, methylbenzene, 1, 4-dimethylcyclohexane, m-xylene, 1-methyl-3-ethylbenzene and mesitylene, adding a surfactant, uniformly stirring, adding barium stearate micro powder, 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the catalyst. The wax removing agent can be used for treating natural gas in a gas field, has a good wax removing effect, and reduces the hydrocarbon dew point and the water dew point of the natural gas. The wax remover is convenient to use and good in wax removing effect.
Description
Technical Field
The invention belongs to the technical field of petroleum and natural gas industry, and particularly relates to a paraffin removal agent for rapid treatment of oil and gas fields and a preparation method thereof.
Background
With the development of natural gas resources in the world, natural gas is widely applied in industry and civilian use. Natural gas belongs to clean energy and has important functions of optimizing energy structure, improving environment and improving life quality of people. However, natural gas extracted from a gas field usually has high wax content, the main component of the wax is a mixture of solid high-grade alkanes, and the wax has high solidification point, so that wax precipitation occurs in a heat exchanger, a low-temperature separator and the like in the dehydration and dealkylation processes of the natural gas, the working efficiency of the heat exchanger is reduced, the heat exchanger is blocked, and the low-temperature separator element is damaged, so that the dew point of the externally-delivered natural gas hydrocarbon and water does not reach the standard, and the normal and stable operation of a natural gas treatment device is seriously influenced. Therefore, natural gas produced by gas field mining must be dewaxed.
For the wax blockage phenomenon of equipment of a natural gas treatment device, a production stopping cleaning method is mostly adopted at present, and the method is low in efficiency and high in safety risk. The existing paraffin blockage prevention method of domestic natural gas treatment plants mainly adopts hydrocarbon injection dissolution to realize dewaxing, and the method seriously depends on the solubility of wax components in injected hydrocarbon, has extremely strict requirements on the control of the hydrocarbon injection components, needs to be transported and supplied from the outside, and has the defects of poor adaptability, low dewaxing efficiency, high operation cost, difficulty in completely avoiding wax precipitation in practical application and the like. Moreover, the use of too much injected hydrocarbon generates a significant amount of energy consumption and can be incorporated into the product gas, thereby increasing the hydrocarbon dew point of the natural gas product gas. Most importantly, wax components can not be completely removed, and then the wax components can be deposited on the inner component of the low-temperature gas-liquid separator, so that the dehydration effect of the low-temperature gas-liquid separator is reduced, the water content in product gas is increased, and the dew point of the product gas-water is increased. Because the hydrocarbon dew point and the water dew point of the product gas are high, when the product gas is conveyed for a long distance, the temperature, the gradient and the direction of the pipeline are changed, so that the hydrocarbon and the water in the natural gas are precipitated, and liquid is accumulated at the low-lying part of the pipeline to influence the conveying capacity of the pipeline.
Patent application CN111732982A discloses a natural gas dewaxing method, in which dewaxing is performed by using a dewaxing agent, wherein the first dewaxing agent is liquid hydrocarbon, the condensate obtained by separation in a low-temperature separator is the second dewaxing agent, the dewaxing effect is not ideal, and the natural gas hydrocarbon dew point and the water dew point after treatment are both high.
Disclosure of Invention
The invention aims to provide a wax removing agent for rapid treatment of oil and gas fields and a preparation method thereof, which can achieve a good wax removing effect and reduce hydrocarbon dew points and water dew points.
In order to achieve the purpose, the invention is realized by the following scheme:
a preparation method of a wax remover for rapid treatment of oil and gas fields comprises the following specific steps:
(1) adding 1.5-1.8 parts of emulsifier into 100 parts of water, stirring and uniformly mixing, then adding 12-14 parts of styrene, 35-37 parts of methacrylate, 0.6-0.8 part of beta-carboxyethyl acrylate, 0.4-0.6 part of methacrylic acid and 0.7-0.9 part of acrylamide, and ultrasonically dispersing uniformly to obtain a pre-emulsion;
(2) then adding 0.1-0.2 part of catalyst into the pre-emulsion, uniformly dropwise adding 0.08-0.1 part of ammonium persulfate solution with the mass concentration of 20-30% while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a pre-mixed solution;
(3) finally, uniformly stirring the premixed solution obtained in the step (2) with 100 parts of toluene, 45-55 parts of 1, 4-dimethylcyclohexane, 35-45 parts of m-xylene, 30-40 parts of 1-methyl-3-ethylbenzene and 20-30 parts of mesitylene, then adding 3-5 parts of surfactant, uniformly stirring, adding 1-2 parts of barium stearate micro powder, 1-2 parts of 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and 0.6-0.8 part of tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the wax remover;
the catalyst is a citric acid copper-cobalt complex loaded by an acryloyl chloride modified mesoporous material, and the citric acid copper-cobalt complex is prepared by taking trisodium citrate, copper nitrate and cobalt nitrate as raw materials.
Preferably, the catalyst is prepared by mixing a citric acid copper cobalt complex and an acryloyl chloride modified mesoporous material according to a mass ratio of 1: 8-10, mixing and grinding.
Preferably, the preparation method of the acryloyl chloride modified mesoporous material comprises the following steps:
(A) dissolving 1 part of lignin and 0.004-0.006 part of polyethylene glycol 200 in 4-5 parts of water to prepare an aqueous solution, carrying out hydrothermal reaction, filtering to obtain filter residues, washing, drying, roasting, washing, and drying to obtain a mesoporous material;
(B) and (B) immersing the mesoporous material obtained in the step (A) into 6-8 parts of 10-20% hydrochloric acid solution by mass concentration, boiling, naturally cooling, washing with deionized water for 3-5 times, drying, adding into 7-9 parts of n-heptane, carrying out ultrasonic oscillation for 20-30 minutes, slowly adding 0.8-1 part of acryloyl chloride at 0 ℃, stirring and reacting at room temperature (25 ℃) for 24 hours, filtering to obtain a solid, washing with n-heptane, and drying to obtain the mesoporous material.
Further preferably, in the step (a), the hydrothermal reaction process conditions are as follows: reacting for 3-4 hours at 125-135 ℃; the drying process conditions are as follows: drying for 3-5 hours at 110-120 ℃; the roasting process conditions are as follows: roasting for 3-4 hours at 850-900 ℃ in a nitrogen atmosphere; the re-washing is to soak, stir and wash for 5-8 minutes by water, and the process conditions of re-drying are as follows: vacuum drying at 60-80 ℃ for 10-12 hours.
Preferably, the preparation method of the citric acid copper cobalt complex is as follows: dissolving trisodium citrate in water to prepare a trisodium citrate solution with the mass concentration of 20%, and heating to 50-55 ℃ for later use; respectively dissolving copper nitrate and cobalt nitrate in water to prepare a copper nitrate solution with the mass concentration of 20% and a cobalt nitrate solution with the mass concentration of 20%, and heating to 40-45 ℃ for later use; and then adding a copper nitrate solution and a cobalt nitrate solution into a trisodium citrate solution, aging at 85-90 ℃ for 5-6 hours, naturally cooling to 40-45 ℃, centrifuging to obtain a precipitate, washing, and drying to obtain the copper-cobalt citrate complex.
Further preferably, the mole ratio of the trisodium citrate to the copper nitrate to the cobalt nitrate is 3: 1: 0.5.
preferably, in the step (2), the dropping time of the ammonium persulfate solution is 30-40 minutes.
Preferably, in the step (2), the process conditions of the stirring reaction are as follows: stirring and reacting for 25-35 minutes at 80-85 ℃.
Preferably, in the step (3), the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and hexadecyl dimethyl sulfopropyl betaine, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the hexadecyl dimethyl sulfopropyl betaine is 1: 0.6 to 0.8.
Preferably, in the step (3), the preparation method of the barium stearate micro powder is as follows: and drying barium stearate in vacuum, and crushing to 100-200 meshes to obtain the barium stearate.
Preferably, in step (3), the homogenization process conditions are as follows: treating for 6-8 minutes under the pressure of 5-6 MPa.
The invention also claims a wax remover for rapid treatment of oil and gas fields, which is obtained by the preparation method.
Compared with the prior art, the invention has the beneficial effects that:
(1) firstly, mixing styrene, methacrylate, beta-carboxyethyl acrylate, methacrylic acid and acrylamide to prepare a pre-emulsion; adding a catalyst into the pre-emulsion, uniformly dropwise adding an ammonium persulfate solution while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a premixed solution; and finally, uniformly stirring the premixed solution, methylbenzene, 1, 4-dimethylcyclohexane, m-xylene, 1-methyl-3-ethylbenzene and mesitylene, adding a surfactant, uniformly stirring, adding barium stearate micro powder, 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the wax remover. The wax removing agent can be used for treating natural gas in a gas field, has a good wax removing effect, and reduces the hydrocarbon dew point and the water dew point of the natural gas. The wax remover is convenient to use, good in wax removing effect and high in popularization value.
(2) The main raw materials of the invention are the specific mixture ratio combination of toluene, 1, 4-dimethylcyclohexane, m-xylene, 1-methyl-3-ethylbenzene and mesitylene, and the wax component has better solubility, thereby playing a role in removing wax and being beneficial to reducing the natural gas hydrocarbon dew point and the water dew point.
(3) The invention also adds the premixed liquid, the barium stearate micro powder, the 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and the tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, improves the uniformity of the wax remover, promotes the wax component to be separated from the natural gas and then dissolved by the solvent, and further enhances the wax removing effect.
(4) The premix is obtained by polymerizing raw materials such as styrene, methacrylate, beta-carboxyethyl acrylate, methacrylic acid, acrylamide and the like, contains components such as styrene-acrylate copolymer, polyacrylamide and the like, and introduces a catalyst in the polymerization reaction process, wherein the catalyst is a citric acid copper cobalt complex loaded by an acryloyl chloride modified mesoporous material, and the citric acid copper cobalt complex is prepared by taking trisodium citrate, copper nitrate and cobalt nitrate as raw materials. The branching of the polymer is promoted by the action of the catalyst, the separation and dissolution effects on the wax component are further improved, and the wax removal effect is enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of a wax remover for rapid treatment of oil and gas fields comprises the following specific steps:
(1) firstly, adding 1.5g of emulsifier into 100g of water, uniformly stirring, adding 14g of styrene, 35g of methacrylate, 0.8g of beta-carboxyethyl acrylate, 0.4g of methacrylic acid and 0.9g of acrylamide, and uniformly dispersing by ultrasonic waves to obtain a pre-emulsion;
(2) then adding 0.1g of catalyst into the pre-emulsion, uniformly dropwise adding 0.1g of ammonium persulfate solution with the mass concentration of 20% while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a premixed solution;
(3) finally, uniformly stirring the premixed solution obtained in the step (2), 100g of toluene, 55g of 1, 4-dimethylcyclohexane, 35g of m-xylene, 40g of 1-methyl-3-ethylbenzene and 20g of mesitylene, then adding 5g of surfactant, uniformly stirring, adding 1g of barium stearate micro powder, 2g of 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and 0.6g of tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the wax remover;
the catalyst is a citric acid copper-cobalt complex loaded by an acryloyl chloride modified mesoporous material, and the citric acid copper-cobalt complex is prepared by taking trisodium citrate, copper nitrate and cobalt nitrate as raw materials.
The catalyst is prepared by mixing a citric acid copper cobalt complex and an acryloyl chloride modified mesoporous material according to a mass ratio of 1: 10 mixing and grinding to obtain the product.
The preparation method of the acryloyl chloride modified mesoporous material comprises the following steps:
(A) dissolving 1g of lignin and 0.004g of polyethylene glycol 200 in 5g of water to prepare an aqueous solution, carrying out hydrothermal reaction, filtering to obtain filter residue, washing, drying, roasting, washing again, and drying again to obtain a mesoporous material;
(B) and (2) immersing the mesoporous material obtained in the step (A) into 6g of hydrochloric acid solution with the mass concentration of 20% to boil, naturally cooling, washing with deionized water for 3 times, drying, adding into 9g of n-heptane, ultrasonically oscillating for 20 minutes, slowly adding 1g of acryloyl chloride at the temperature of 0 ℃, stirring and reacting at room temperature (25 ℃) for 24 hours, filtering to obtain a solid, washing with n-heptane, and drying to obtain the mesoporous material.
In the step (A), the process conditions of the hydrothermal reaction are as follows: reacting for 4 hours at 125 ℃; the drying process conditions are as follows: drying at 110 deg.C for 5 hr; the roasting process conditions are as follows: roasting for 4 hours at 850 ℃ in a nitrogen atmosphere; the rewashing is soaking, stirring and washing for 5 minutes by using water, and the process conditions of rewetting and drying are as follows: vacuum drying at 80 deg.C for 10 hr.
The preparation method of the citric acid copper cobalt complex comprises the following steps: dissolving trisodium citrate in water to prepare a trisodium citrate solution with the mass concentration of 20%, and heating to 55 ℃ for later use; respectively dissolving copper nitrate and cobalt nitrate in water to prepare a copper nitrate solution with the mass concentration of 20% and a cobalt nitrate solution with the mass concentration of 20%, and heating to 40 ℃ for later use; and then adding the copper nitrate solution and the cobalt nitrate solution into the trisodium citrate solution, aging for 5 hours at 90 ℃, naturally cooling to 45 ℃, centrifuging to obtain a precipitate, washing and drying to obtain the copper-cobalt citrate complex. The mole ratio of trisodium citrate to copper nitrate to cobalt nitrate is 3: 1: 0.5.
in the step (2), the dropping time of the ammonium persulfate solution was 30 minutes. The technological conditions of the stirring reaction are as follows: the reaction was stirred at 85 ℃ for 25 minutes.
In the step (3), the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and hexadecyl dimethyl sulfopropyl betaine, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the hexadecyl dimethyl sulfopropyl betaine is 1: 0.8.
in the step (3), the preparation method of the barium stearate micro powder comprises the following steps: drying barium stearate in vacuum, and pulverizing to 100 mesh.
In the step (3), the homogenization process conditions are as follows: treating at 6MPa for 6 min.
Example 2
A preparation method of a wax remover for rapid treatment of oil and gas fields comprises the following specific steps:
(1) firstly, adding 1.8g of emulsifier into 100g of water, uniformly stirring, adding 12g of styrene, 37g of methacrylate, 0.6g of beta-carboxyethyl acrylate, 0.6g of methacrylic acid and 0.7g of acrylamide, and uniformly dispersing by ultrasonic waves to obtain a pre-emulsion;
(2) then adding 0.2g of catalyst into the pre-emulsion, uniformly dropwise adding 0.08g of ammonium persulfate solution with the mass concentration of 30% while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a premixed solution;
(3) finally, uniformly stirring the premixed solution obtained in the step (2), 100g of toluene, 45g of 1, 4-dimethylcyclohexane, 45g of m-xylene, 30g of 1-methyl-3-ethyl benzene and 30g of mesitylene, then adding 3g of surfactant, uniformly stirring, adding 2g of barium stearate micro powder, 1g of 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and 0.8g of tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the wax remover;
the catalyst is a citric acid copper-cobalt complex loaded by an acryloyl chloride modified mesoporous material, and the citric acid copper-cobalt complex is prepared by taking trisodium citrate, copper nitrate and cobalt nitrate as raw materials.
The catalyst is prepared by mixing a citric acid copper cobalt complex and an acryloyl chloride modified mesoporous material according to a mass ratio of 1: 8 mixing and grinding to obtain the product.
The preparation method of the acryloyl chloride modified mesoporous material comprises the following steps:
(A) dissolving 1g of lignin and 0.006g of polyethylene glycol 200 in 4g of water to prepare an aqueous solution, carrying out hydrothermal reaction, filtering to obtain filter residue, washing, drying, roasting, washing again, and drying again to obtain a mesoporous material;
(B) and (2) immersing the mesoporous material obtained in the step (A) into 8g of hydrochloric acid solution with the mass concentration of 10% to boil, naturally cooling, washing with deionized water for 5 times, drying, adding 7g of n-heptane, ultrasonically oscillating for 30 minutes, slowly adding 0.8g of acryloyl chloride at the temperature of 0 ℃, stirring and reacting at room temperature (25 ℃) for 24 hours, filtering to obtain a solid, washing with n-heptane, and drying to obtain the mesoporous material.
In the step (A), the process conditions of the hydrothermal reaction are as follows: reacting for 3 hours at 135 ℃; the drying process conditions are as follows: drying at 120 deg.C for 3 hr; the roasting process conditions are as follows: roasting at 900 ℃ for 3 hours in a nitrogen atmosphere; the rewashing is soaking, stirring and washing for 8 minutes by using water, and the process conditions of rewetting and drying are as follows: vacuum drying at 60 deg.C for 12 hr.
The preparation method of the citric acid copper cobalt complex comprises the following steps: dissolving trisodium citrate in water to prepare trisodium citrate solution with the mass concentration of 20%, and heating to 50 ℃ for later use; respectively dissolving copper nitrate and cobalt nitrate in water to prepare a copper nitrate solution with the mass concentration of 20% and a cobalt nitrate solution with the mass concentration of 20%, and heating to 45 ℃ for later use; and then adding the copper nitrate solution and the cobalt nitrate solution into the trisodium citrate solution, aging at 85 ℃ for 6 hours, naturally cooling to 40 ℃, centrifuging to obtain a precipitate, washing and drying to obtain the copper-cobalt citrate complex. The mole ratio of trisodium citrate to copper nitrate to cobalt nitrate is 3: 1: 0.5.
in the step (2), the dropping time of the ammonium persulfate solution was 40 minutes. The technological conditions of the stirring reaction are as follows: the reaction was stirred at 80 ℃ for 35 minutes.
In the step (3), the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and hexadecyl dimethyl sulfopropyl betaine, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the hexadecyl dimethyl sulfopropyl betaine is 1: 0.6.
in the step (3), the preparation method of the barium stearate micro powder comprises the following steps: drying barium stearate in vacuum, and pulverizing to 200 meshes.
In the step (3), the homogenization process conditions are as follows: treating at 5MPa for 8 min.
Example 3
A preparation method of a wax remover for rapid treatment of oil and gas fields comprises the following specific steps:
(1) firstly, adding 1.6g of emulsifier into 100g of water, uniformly stirring, adding 13g of styrene, 36g of methacrylate, 0.7g of beta-carboxyethyl acrylate, 0.5g of methacrylic acid and 0.8g of acrylamide, and uniformly dispersing by ultrasonic waves to obtain a pre-emulsion;
(2) then adding 0.15g of catalyst into the pre-emulsion, uniformly dropwise adding 0.09g of ammonium persulfate solution with the mass concentration of 25% while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a premixed solution;
(3) finally, uniformly stirring the premixed solution obtained in the step (2), 100g of toluene, 50g of 1, 4-dimethylcyclohexane, 40g of m-xylene, 35g of 1-methyl-3-ethylbenzene and 25g of mesitylene, then adding 4g of surfactant, uniformly stirring, adding 1.5g of barium stearate micro powder, 1.5g of 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and 0.7g of tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the wax remover;
the catalyst is a citric acid copper-cobalt complex loaded by an acryloyl chloride modified mesoporous material, and the citric acid copper-cobalt complex is prepared by taking trisodium citrate, copper nitrate and cobalt nitrate as raw materials.
The catalyst is prepared by mixing a citric acid copper cobalt complex and an acryloyl chloride modified mesoporous material according to a mass ratio of 1: 9 mixing and grinding to obtain the product.
The preparation method of the acryloyl chloride modified mesoporous material comprises the following steps:
(A) firstly dissolving 1g of lignin and 0.005g of polyethylene glycol 200 in 4.5g of water to prepare an aqueous solution, carrying out hydrothermal reaction, filtering to obtain filter residue, washing, drying, roasting, washing again, and drying again to obtain a mesoporous material;
(B) and (2) immersing the mesoporous material obtained in the step (A) into 7g of hydrochloric acid solution with the mass concentration of 15% to boil, naturally cooling, washing with deionized water for 4 times, drying, then adding 8g of n-heptane, carrying out ultrasonic oscillation for 25 minutes, slowly adding 0.9g of acryloyl chloride at the temperature of 0 ℃, stirring and reacting at room temperature (25 ℃) for 24 hours, filtering to obtain a solid, washing with n-heptane, and drying to obtain the mesoporous material.
In the step (A), the process conditions of the hydrothermal reaction are as follows: reacting for 3.5 hours at 130 ℃; the drying process conditions are as follows: drying at 115 deg.C for 4 hr; the roasting process conditions are as follows: roasting at 880 ℃ for 3.5 hours in nitrogen atmosphere; the rewashing is soaking, stirring and washing for 7 minutes by using water, and the process conditions of rewetting and drying are as follows: vacuum drying at 70 deg.C for 11 hr.
The preparation method of the citric acid copper cobalt complex comprises the following steps: dissolving trisodium citrate in water to prepare a trisodium citrate solution with the mass concentration of 20%, and heating to 52 ℃ for later use; respectively dissolving copper nitrate and cobalt nitrate in water to prepare a copper nitrate solution with the mass concentration of 20% and a cobalt nitrate solution with the mass concentration of 20%, and heating to 43 ℃ for later use; and then adding the copper nitrate solution and the cobalt nitrate solution into the trisodium citrate solution, aging for 5.5 hours at 88 ℃, naturally cooling to 42 ℃, centrifuging to obtain a precipitate, washing and drying to obtain the copper-cobalt citrate complex. The mole ratio of trisodium citrate to copper nitrate to cobalt nitrate is 3: 1: 0.5.
in the step (2), the dropping time of the ammonium persulfate solution was 35 minutes. The technological conditions of the stirring reaction are as follows: the reaction was stirred at 83 ℃ for 30 minutes.
In the step (3), the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and hexadecyl dimethyl sulfopropyl betaine, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the hexadecyl dimethyl sulfopropyl betaine is 1: 0.7.
in the step (3), the preparation method of the barium stearate micro powder comprises the following steps: drying barium stearate in vacuum, and pulverizing to 200 meshes.
In the step (3), the homogenization process conditions are as follows: treating at 5MPa for 7 min.
Comparative example 1
A preparation method of a wax remover for rapid treatment of oil and gas fields comprises the following specific steps:
(1) firstly, adding 1.5g of emulsifier into 100g of water, uniformly stirring, adding 14g of styrene, 35g of methacrylate, 0.8g of beta-carboxyethyl acrylate and 0.4g of methacrylic acid, and uniformly dispersing by ultrasonic waves to obtain a pre-emulsion;
(2) then adding 0.1g of catalyst into the pre-emulsion, uniformly dropwise adding 0.1g of ammonium persulfate solution with the mass concentration of 20% while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a premixed solution;
(3) finally, uniformly stirring the premixed solution obtained in the step (2), 100g of toluene, 55g of 1, 4-dimethylcyclohexane, 35g of m-xylene, 40g of 1-methyl-3-ethylbenzene and 20g of mesitylene, then adding 5g of surfactant, uniformly stirring, adding 1g of barium stearate micro powder, 2g of 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and 0.6g of tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the wax remover;
the catalyst is a citric acid copper-cobalt complex loaded by an acryloyl chloride modified mesoporous material, and the citric acid copper-cobalt complex is prepared by taking trisodium citrate, copper nitrate and cobalt nitrate as raw materials.
The catalyst is prepared by mixing a citric acid copper cobalt complex and an acryloyl chloride modified mesoporous material according to a mass ratio of 1: 10 mixing and grinding to obtain the product.
The preparation method of the acryloyl chloride modified mesoporous material comprises the following steps:
(A) dissolving 1g of lignin and 0.004g of polyethylene glycol 200 in 5g of water to prepare an aqueous solution, carrying out hydrothermal reaction, filtering to obtain filter residue, washing, drying, roasting, washing again, and drying again to obtain a mesoporous material;
(B) and (2) immersing the mesoporous material obtained in the step (A) into 6g of hydrochloric acid solution with the mass concentration of 20% to boil, naturally cooling, washing with deionized water for 3 times, drying, adding into 9g of n-heptane, ultrasonically oscillating for 20 minutes, slowly adding 1g of acryloyl chloride at the temperature of 0 ℃, stirring and reacting at room temperature (25 ℃) for 24 hours, filtering to obtain a solid, washing with n-heptane, and drying to obtain the mesoporous material.
In the step (A), the process conditions of the hydrothermal reaction are as follows: reacting for 4 hours at 125 ℃; the drying process conditions are as follows: drying at 110 deg.C for 5 hr; the roasting process conditions are as follows: roasting for 4 hours at 850 ℃ in a nitrogen atmosphere; the rewashing is soaking, stirring and washing for 5 minutes by using water, and the process conditions of rewetting and drying are as follows: vacuum drying at 80 deg.C for 10 hr.
The preparation method of the citric acid copper cobalt complex comprises the following steps: dissolving trisodium citrate in water to prepare a trisodium citrate solution with the mass concentration of 20%, and heating to 55 ℃ for later use; respectively dissolving copper nitrate and cobalt nitrate in water to prepare a copper nitrate solution with the mass concentration of 20% and a cobalt nitrate solution with the mass concentration of 20%, and heating to 40 ℃ for later use; and then adding the copper nitrate solution and the cobalt nitrate solution into the trisodium citrate solution, aging for 5 hours at 90 ℃, naturally cooling to 45 ℃, centrifuging to obtain a precipitate, washing and drying to obtain the copper-cobalt citrate complex. The mole ratio of trisodium citrate to copper nitrate to cobalt nitrate is 3: 1: 0.5.
in the step (2), the dropping time of the ammonium persulfate solution was 30 minutes. The technological conditions of the stirring reaction are as follows: the reaction was stirred at 85 ℃ for 25 minutes.
In the step (3), the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and hexadecyl dimethyl sulfopropyl betaine, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the hexadecyl dimethyl sulfopropyl betaine is 1: 0.8.
in the step (3), the preparation method of the barium stearate micro powder comprises the following steps: drying barium stearate in vacuum, and pulverizing to 100 mesh.
In the step (3), the homogenization process conditions are as follows: treating at 6MPa for 6 min.
Comparative example 2
A preparation method of a wax remover for rapid treatment of oil and gas fields comprises the following specific steps:
(1) firstly, adding 1.5g of emulsifier into 100g of water, uniformly stirring, adding 14g of styrene, 35g of methacrylate, 0.8g of beta-carboxyethyl acrylate, 0.4g of methacrylic acid and 0.9g of acrylamide, and uniformly dispersing by ultrasonic waves to obtain a pre-emulsion;
(2) then adding 0.1g of catalyst into the pre-emulsion, uniformly dropwise adding 0.1g of ammonium persulfate solution with the mass concentration of 20% while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a premixed solution;
(3) finally, uniformly stirring the premixed solution obtained in the step (2), 100g of toluene, 55g of 1, 4-dimethylcyclohexane, 35g of m-xylene, 40g of 1-methyl-3-ethylbenzene and 20g of mesitylene, then adding 5g of surfactant, uniformly stirring, adding 2g of 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and 0.6g of tributylhexylphosphinobis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the wax remover;
the catalyst is a citric acid copper-cobalt complex loaded by an acryloyl chloride modified mesoporous material, and the citric acid copper-cobalt complex is prepared by taking trisodium citrate, copper nitrate and cobalt nitrate as raw materials.
The catalyst is prepared by mixing a citric acid copper cobalt complex and an acryloyl chloride modified mesoporous material according to a mass ratio of 1: 10 mixing and grinding to obtain the product.
The preparation method of the acryloyl chloride modified mesoporous material comprises the following steps:
(A) dissolving 1g of lignin and 0.004g of polyethylene glycol 200 in 5g of water to prepare an aqueous solution, carrying out hydrothermal reaction, filtering to obtain filter residue, washing, drying, roasting, washing again, and drying again to obtain a mesoporous material;
(B) and (2) immersing the mesoporous material obtained in the step (A) into 6g of hydrochloric acid solution with the mass concentration of 20% to boil, naturally cooling, washing with deionized water for 3 times, drying, adding into 9g of n-heptane, ultrasonically oscillating for 20 minutes, slowly adding 1g of acryloyl chloride at the temperature of 0 ℃, stirring and reacting at room temperature (25 ℃) for 24 hours, filtering to obtain a solid, washing with n-heptane, and drying to obtain the mesoporous material.
In the step (A), the process conditions of the hydrothermal reaction are as follows: reacting for 4 hours at 125 ℃; the drying process conditions are as follows: drying at 110 deg.C for 5 hr; the roasting process conditions are as follows: roasting for 4 hours at 850 ℃ in a nitrogen atmosphere; the rewashing is soaking, stirring and washing for 5 minutes by using water, and the process conditions of rewetting and drying are as follows: vacuum drying at 80 deg.C for 10 hr.
The preparation method of the citric acid copper cobalt complex comprises the following steps: dissolving trisodium citrate in water to prepare a trisodium citrate solution with the mass concentration of 20%, and heating to 55 ℃ for later use; respectively dissolving copper nitrate and cobalt nitrate in water to prepare a copper nitrate solution with the mass concentration of 20% and a cobalt nitrate solution with the mass concentration of 20%, and heating to 40 ℃ for later use; and then adding the copper nitrate solution and the cobalt nitrate solution into the trisodium citrate solution, aging for 5 hours at 90 ℃, naturally cooling to 45 ℃, centrifuging to obtain a precipitate, washing and drying to obtain the copper-cobalt citrate complex. The mole ratio of trisodium citrate to copper nitrate to cobalt nitrate is 3: 1: 0.5.
in the step (2), the dropping time of the ammonium persulfate solution was 30 minutes. The technological conditions of the stirring reaction are as follows: the reaction was stirred at 85 ℃ for 25 minutes.
In the step (3), the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and hexadecyl dimethyl sulfopropyl betaine, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the hexadecyl dimethyl sulfopropyl betaine is 1: 0.8.
in the step (3), the homogenization process conditions are as follows: treating at 6MPa for 6 min.
Comparative example 3
A preparation method of a wax remover for rapid treatment of oil and gas fields comprises the following specific steps:
(1) firstly, adding 1.5g of emulsifier into 100g of water, uniformly stirring, adding 14g of styrene, 35g of methacrylate, 0.8g of beta-carboxyethyl acrylate, 0.4g of methacrylic acid and 0.9g of acrylamide, and uniformly dispersing by ultrasonic waves to obtain a pre-emulsion;
(2) then adding 0.1g of catalyst into the pre-emulsion, uniformly dropwise adding 0.1g of ammonium persulfate solution with the mass concentration of 20% while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a premixed solution;
(3) finally, uniformly stirring the premixed solution obtained in the step (2), 100g of toluene, 55g of 1, 4-dimethylcyclohexane, 35g of m-xylene, 40g of 1-methyl-3-ethylbenzene and 20g of mesitylene, then adding 5g of surfactant, uniformly stirring, adding 1g of barium stearate micro powder and 0.6g of tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the wax remover;
the catalyst is a citric acid copper-cobalt complex loaded by an acryloyl chloride modified mesoporous material, and the citric acid copper-cobalt complex is prepared by taking trisodium citrate, copper nitrate and cobalt nitrate as raw materials.
The catalyst is prepared by mixing a citric acid copper cobalt complex and an acryloyl chloride modified mesoporous material according to a mass ratio of 1: 10 mixing and grinding to obtain the product.
The preparation method of the acryloyl chloride modified mesoporous material comprises the following steps:
(A) dissolving 1g of lignin and 0.004g of polyethylene glycol 200 in 5g of water to prepare an aqueous solution, carrying out hydrothermal reaction, filtering to obtain filter residue, washing, drying, roasting, washing again, and drying again to obtain a mesoporous material;
(B) and (2) immersing the mesoporous material obtained in the step (A) into 6g of hydrochloric acid solution with the mass concentration of 20% to boil, naturally cooling, washing with deionized water for 3 times, drying, adding into 9g of n-heptane, ultrasonically oscillating for 20 minutes, slowly adding 1g of acryloyl chloride at the temperature of 0 ℃, stirring and reacting at room temperature (25 ℃) for 24 hours, filtering to obtain a solid, washing with n-heptane, and drying to obtain the mesoporous material.
In the step (A), the process conditions of the hydrothermal reaction are as follows: reacting for 4 hours at 125 ℃; the drying process conditions are as follows: drying at 110 deg.C for 5 hr; the roasting process conditions are as follows: roasting for 4 hours at 850 ℃ in a nitrogen atmosphere; the rewashing is soaking, stirring and washing for 5 minutes by using water, and the process conditions of rewetting and drying are as follows: vacuum drying at 80 deg.C for 10 hr.
The preparation method of the citric acid copper cobalt complex comprises the following steps: dissolving trisodium citrate in water to prepare a trisodium citrate solution with the mass concentration of 20%, and heating to 55 ℃ for later use; respectively dissolving copper nitrate and cobalt nitrate in water to prepare a copper nitrate solution with the mass concentration of 20% and a cobalt nitrate solution with the mass concentration of 20%, and heating to 40 ℃ for later use; and then adding the copper nitrate solution and the cobalt nitrate solution into the trisodium citrate solution, aging for 5 hours at 90 ℃, naturally cooling to 45 ℃, centrifuging to obtain a precipitate, washing and drying to obtain the copper-cobalt citrate complex. The mole ratio of trisodium citrate to copper nitrate to cobalt nitrate is 3: 1: 0.5.
in the step (2), the dropping time of the ammonium persulfate solution was 30 minutes. The technological conditions of the stirring reaction are as follows: the reaction was stirred at 85 ℃ for 25 minutes.
In the step (3), the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and hexadecyl dimethyl sulfopropyl betaine, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the hexadecyl dimethyl sulfopropyl betaine is 1: 0.8.
in the step (3), the preparation method of the barium stearate micro powder comprises the following steps: drying barium stearate in vacuum, and pulverizing to 100 mesh.
In the step (3), the homogenization process conditions are as follows: treating at 6MPa for 6 min.
Comparative example 4
A preparation method of a wax remover for rapid treatment of oil and gas fields comprises the following specific steps:
(1) firstly, adding 1.5g of emulsifier into 100g of water, uniformly stirring, adding 14g of styrene, 35g of methacrylate, 0.8g of beta-carboxyethyl acrylate, 0.4g of methacrylic acid and 0.9g of acrylamide, and uniformly dispersing by ultrasonic waves to obtain a pre-emulsion;
(2) then adding 0.1g of catalyst into the pre-emulsion, uniformly dropwise adding 0.1g of ammonium persulfate solution with the mass concentration of 20% while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a premixed solution;
(3) finally, uniformly stirring the premixed solution obtained in the step (2), 100g of toluene, 55g of 1, 4-dimethylcyclohexane, 35g of m-xylene, 40g of 1-methyl-3-ethylbenzene and 20g of mesitylene, then adding 5g of surfactant, uniformly stirring, adding 1g of barium stearate micro powder, 2g of 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and 0.6g of tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the wax remover;
the catalyst is a mesoporous material loaded copper citrate complex, and the copper citrate complex is prepared from trisodium citrate and copper nitrate serving as raw materials.
The catalyst is prepared by mixing a copper citrate complex and a mesoporous material according to a mass ratio of 1: 10 mixing and grinding to obtain the product.
The preparation method of the mesoporous material comprises the following steps: dissolving 1g of lignin and 0.004g of polyethylene glycol 200 in 5g of water to prepare an aqueous solution, carrying out hydrothermal reaction, filtering to obtain filter residue, washing, drying, roasting, washing again, and drying again to obtain the lignin-polyethylene glycol-based catalyst.
The technological conditions of the hydrothermal reaction are as follows: reacting for 4 hours at 125 ℃; the drying process conditions are as follows: drying at 110 deg.C for 5 hr; the roasting process conditions are as follows: roasting for 4 hours at 850 ℃ in a nitrogen atmosphere; the rewashing is soaking, stirring and washing for 5 minutes by using water, and the process conditions of rewetting and drying are as follows: vacuum drying at 80 deg.C for 10 hr.
The preparation method of the copper citrate complex is as follows: dissolving trisodium citrate in water to prepare a trisodium citrate solution with the mass concentration of 20%, and heating to 55 ℃ for later use; dissolving copper nitrate in water to prepare a copper nitrate solution with the mass concentration of 20%, and heating to 40 ℃ for later use; and then adding the copper nitrate solution into a trisodium citrate solution, aging for 5 hours at 90 ℃, naturally cooling to 45 ℃, centrifuging to obtain a precipitate, washing and drying to obtain the copper citrate complex. The molar ratio of trisodium citrate to copper nitrate is 3: 1.5.
in the step (2), the dropping time of the ammonium persulfate solution was 30 minutes. The technological conditions of the stirring reaction are as follows: the reaction was stirred at 85 ℃ for 25 minutes.
In the step (3), the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and hexadecyl dimethyl sulfopropyl betaine, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the hexadecyl dimethyl sulfopropyl betaine is 1: 0.8.
in the step (3), the preparation method of the barium stearate micro powder comprises the following steps: drying barium stearate in vacuum, and pulverizing to 100 mesh.
In the step (3), the homogenization process conditions are as follows: treating at 6MPa for 6 min.
The natural gas paraffin removal effect evaluation of the paraffin removal agents obtained in the examples 1-3 and the comparative examples 1-4 is carried out by the following specific method:
separating natural gas with the temperature of 40 ℃ and the pressure of 10.5MPa in a production separator to remove water and liquid impurities in the natural gas, then air-cooling in an air cooler to reduce the temperature to 26 ℃, then entering a precooler to exchange heat with low-temperature natural gas product gas to reduce the temperature to 16 ℃; and then the natural gas is separated by a gas separator to remove the condensate in the natural gas, so that the raw material natural gas is obtained.
And then atomizing the wax removing agent by an atomizer, pumping the atomized wax removing agent into the raw material natural gas, mixing the atomized wax removing agent with the raw material natural gas to obtain a mixture, feeding the mixture into a post cooler, and carrying out heat exchange with the low-temperature natural gas product gas to reduce the temperature to 0 ℃, wherein the dosage of the wax removing agent is 20 kg/day. The mixture is throttled and expanded by a throttle expansion valve, the temperature before throttling and expanding is 0 ℃, the pressure is 10.5MPa, the temperature after throttling and expanding is-18 ℃ and the pressure is 6.5MPa, the mixture enters a low-temperature gas-liquid separator for separation to obtain dewaxed natural gas, the dewaxed natural gas is further separated to obtain low-temperature natural gas product gas, and the separated liquid wax enters an alcohol hydrocarbon treatment process along with alcohol hydrocarbon liquid; and the low-temperature natural gas product gas returns to the aftercooler and the forecooler in sequence through a circulating pipeline, exchanges heat with the raw natural gas in the aftercooler and the forecooler, and obtains dry gas after cold energy is recovered.
The hydrocarbon dew point and the water dew point of the dry gas are detected with reference to relevant standards: GB/T27895-2011 "eye measurement method for measuring dew point of natural gas hydrocarbon" for cooling mirror surface; GB/T17283-2014 cooling mirror condensation hygrometer for measuring dew point of natural gas water. The results are shown in Table 1.
TABLE 1 examination of dewaxing effect of dewaxing agent
| Hydrocarbon dew point (. degree. C.) | Water dew point (. degree. C.) | |
| Example 1 | -11 | -31 |
| Example 2 | -12.5 | -28 |
| Example 3 | -14 | -30 |
| Comparative example 1 | -6 | -18 |
| Comparative example 2 | -9.5 | -24 |
| Comparative example 3 | -9 | -21 |
| Comparative example 4 | -7.5 | -22 |
As can be seen from Table 1, the natural gas treated with the paraffin removal agent obtained in examples 1 to 3 has low hydrocarbon dew point and water dew point, has good paraffin removal effect, and is superior to the effects of comparative examples 1 to 4.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A preparation method of a wax removing agent for rapid treatment of oil and gas fields is characterized by comprising the following steps:
(1) adding 1.5-1.8 parts of emulsifier into 100 parts of water, stirring and uniformly mixing, then adding 12-14 parts of styrene, 35-37 parts of methacrylate, 0.6-0.8 part of beta-carboxyethyl acrylate, 0.4-0.6 part of methacrylic acid and 0.7-0.9 part of acrylamide, and ultrasonically dispersing uniformly to obtain a pre-emulsion;
(2) adding 0.1-0.2 part of catalyst into the pre-emulsion in the step (1), then uniformly dropwise adding 0.08-0.1 part of ammonium persulfate solution with the mass concentration of 20-30% while stirring, and continuously stirring for reaction after dropwise adding is finished to obtain a pre-mixed solution;
(3) uniformly stirring the premixed solution obtained in the step (2) with 100 parts of toluene, 45-55 parts of 1, 4-dimethylcyclohexane, 35-45 parts of m-xylene, 30-40 parts of 1-methyl-3-ethylbenzene and 20-30 parts of mesitylene, then adding 3-5 parts of a surfactant, uniformly stirring, adding 1-2 parts of barium stearate micro powder, 1-2 parts of 1-benzyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide salt and 0.6-0.8 part of tributylhexylphosphine bis (trifluoromethanesulfonyl) imide salt, and homogenizing to obtain the paraffin remover;
the catalyst is a citric acid copper-cobalt complex loaded by an acryloyl chloride modified mesoporous material, and the citric acid copper-cobalt complex is prepared by taking trisodium citrate, copper nitrate and cobalt nitrate as raw materials.
2. The preparation method according to claim 1, wherein the catalyst is prepared by mixing a copper cobalt citrate complex and an acryloyl chloride modified mesoporous material in a mass ratio of 1: 8-10, mixing and grinding.
3. The preparation method according to claim 1, wherein the acryloyl chloride modified mesoporous material is prepared by the following steps in parts by weight:
(A) dissolving 1 part of lignin and 0.004-0.006 part of polyethylene glycol 200 in 4-5 parts of water to prepare an aqueous solution, carrying out hydrothermal reaction, filtering to obtain filter residues, washing, drying, roasting, washing, and drying to obtain a mesoporous material;
(B) and (B) immersing the mesoporous material obtained in the step (A) into 6-8 parts of 10-20% hydrochloric acid solution by mass concentration, boiling, naturally cooling, washing with deionized water for 3-5 times, drying, adding into 7-9 parts of n-heptane, carrying out ultrasonic oscillation for 20-30 minutes, slowly adding 0.8-1 part of acryloyl chloride at 0 ℃, stirring and reacting for 24 hours at 25 ℃, filtering to obtain a solid, washing with n-heptane, and drying to obtain the mesoporous material.
4. The method according to any one of claims 1 to 3, wherein the copper cobalt citrate complex is prepared as follows: dissolving trisodium citrate in water to prepare a trisodium citrate solution with the mass concentration of 20%, and heating to 50-55 ℃ for later use; respectively dissolving copper nitrate and cobalt nitrate in water to prepare a copper nitrate solution and a cobalt nitrate solution with mass concentration of 20%, and heating to 40-45 ℃ for later use; and then adding a copper nitrate solution and a cobalt nitrate solution into a trisodium citrate solution, aging at 85-90 ℃ for 5-6 hours, naturally cooling to 40-45 ℃, centrifuging to obtain a precipitate, washing, and drying to obtain the copper-cobalt citrate complex.
5. The preparation method according to claim 1, wherein in the step (2), the dropping time of the ammonium persulfate solution is 30 to 40 minutes.
6. The preparation method according to claim 1, wherein in the step (2), the process conditions of the stirring reaction are as follows: stirring and reacting for 25-35 minutes at 80-85 ℃.
7. The preparation method according to claim 1, wherein in the step (3), the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and hexadecyl dimethyl sulfopropyl betaine, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the hexadecyl dimethyl sulfopropyl betaine is 1: 0.6 to 0.8.
8. The method according to claim 1, wherein in the step (3), the barium stearate fine powder is prepared by the following method: and drying barium stearate in vacuum, and crushing to 100-200 meshes to obtain the barium stearate.
9. The method of claim 1, wherein in step (3), the homogenization process conditions are as follows: treating for 6-8 minutes under the pressure of 5-6 MPa.
10. The wax removing agent for the rapid treatment of oil and gas fields, which is obtained by the preparation method of any one of claims 1 to 9.
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