CN110684983A - Neutral scale remover and preparation method thereof - Google Patents
Neutral scale remover and preparation method thereof Download PDFInfo
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- CN110684983A CN110684983A CN201911246412.2A CN201911246412A CN110684983A CN 110684983 A CN110684983 A CN 110684983A CN 201911246412 A CN201911246412 A CN 201911246412A CN 110684983 A CN110684983 A CN 110684983A
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000000178 monomer Substances 0.000 claims abstract description 26
- 239000004094 surface-active agent Substances 0.000 claims abstract description 19
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000003999 initiator Substances 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 24
- 239000003599 detergent Substances 0.000 claims description 23
- 230000004913 activation Effects 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 12
- 230000002378 acidificating effect Effects 0.000 claims description 12
- 238000004090 dissolution Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- ALYNCZNDIQEVRV-UHFFFAOYSA-N 4-aminobenzoic acid Chemical compound NC1=CC=C(C(O)=O)C=C1 ALYNCZNDIQEVRV-UHFFFAOYSA-N 0.000 claims description 8
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 8
- 239000012964 benzotriazole Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000003786 synthesis reaction Methods 0.000 claims description 7
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229920001529 polyepoxysuccinic acid Polymers 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- HVBSAKJJOYLTQU-UHFFFAOYSA-N 4-aminobenzenesulfonic acid Chemical compound NC1=CC=C(S(O)(=O)=O)C=C1 HVBSAKJJOYLTQU-UHFFFAOYSA-N 0.000 claims description 4
- 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 compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims description 4
- RTQKKSJHZQNXHG-UHFFFAOYSA-K [Na+].[Na+].[Na+].CC([O-])=O.CC([O-])=O.CC([O-])=O.NCCN Chemical compound [Na+].[Na+].[Na+].CC([O-])=O.CC([O-])=O.CC([O-])=O.NCCN RTQKKSJHZQNXHG-UHFFFAOYSA-K 0.000 claims description 4
- 229960004050 aminobenzoic acid Drugs 0.000 claims description 4
- 229960003237 betaine Drugs 0.000 claims description 4
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 4
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 229950000244 sulfanilic acid Drugs 0.000 claims description 4
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 2
- 239000003002 pH adjusting agent Substances 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 2
- 230000005764 inhibitory process Effects 0.000 abstract description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000003129 oil well Substances 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 21
- 239000003921 oil Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000002401 inhibitory effect Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000012459 cleaning agent Substances 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- BEGBSFPALGFMJI-UHFFFAOYSA-N ethene;sodium Chemical group [Na].C=C BEGBSFPALGFMJI-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- OBMBUODDCOAJQP-UHFFFAOYSA-N 2-chloro-4-phenylquinoline Chemical compound C=12C=CC=CC2=NC(Cl)=CC=1C1=CC=CC=C1 OBMBUODDCOAJQP-UHFFFAOYSA-N 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
The invention discloses a neutral scale remover and a preparation method thereof, the neutral scale remover comprises a supermolecule scale remover monomer solution, a surfactant and a pH regulator, the supermolecule scale remover monomer is prepared by adopting a special raw material proportion, is safe and long-acting, does not have chemical reaction with scale and metal, realizes stripping and scale decomposition through dispersion and molecular assembly, and is finally stably attached to the surface of the metal, so that insoluble scales such as oil scale, mud scale, crystallization scale, rust scale and the like which are difficult to clean by conventional chemical cleaning can be removed, a compact protective film is formed, the long-term stable operation of an oil well can be maintained, the formation of subsequent scales is prevented, and the long-acting scale removal and scale inhibition are realized.
Description
Technical Field
The invention belongs to the technical field of a scale remover, and particularly relates to a neutral scale remover and a preparation method thereof.
Background
Scaling of the oil field downhole pipe string can cause production stoppage of an oil-water well, yield reduction, service life shortening and the like. The existing descaling agent commonly used in oil fields is mainly an acid system, so that the pipe column is corroded by acid descaling, the pipe column is damaged, the cost is increased, the production period is shortened, and even the production is stopped; meanwhile, the treated pipe column still continues to scale, so that scaling-descaling circulation is caused.
However, the strong acid cleaning agent has large addition amount, strong corrosivity and large toxicity, wastes water, labor and time in the whole cleaning process, pollutes the environment, has certain danger to equipment and operators, and is inconvenient to transport and store. In addition, many expensive industrial equipment is not suitable for use due to the strong corrosiveness of the strong acid cleaning agent. Compared with inorganic acid cleaning agents, organic acid cleaning agents are expensive, need to be operated at higher temperature, and are long in cleaning time and labor-intensive.
Disclosure of Invention
The invention provides a neutral detergent and a preparation method thereof, and solves the problems of corrosion of an acid detergent to a pipe column, high cost and low safety in the prior art and the problem of low scale removal rate of the conventional neutral detergent.
The specific technical scheme is as follows:
a neutral scale remover comprises the following raw materials in parts by weight: 90-105 parts of supermolecule scale remover monomer solution, 5-10 parts of surfactant and 0-1 part of pH regulator; wherein, the synthesis steps of the supermolecule detergent monomer solution are as follows: adding 50 parts of absolute ethyl alcohol into a reaction kettle, then adding 2-3 parts of polyethylene glycol, stirring at 1000r/min, after complete dissolution, adding 5-6 parts of p-aminobenzoic acid or 5-6 parts of 4-aminobenzenesulfonic acid, stirring at 1000r/min for 10min, raising the temperature to 60 ℃, then dropwise adding 7-9 parts of benzotriazole, simultaneously dropwise adding an acid activation initiator, raising the temperature to 80 ℃, and reacting for 8h to obtain the supermolecule scale remover monomer solution.
Preferably, the synthesis steps of the acidic activated initiator are as follows:
dissolving 2-3 parts of sodium silicate in 20 parts of absolute ethyl alcohol, stirring and dissolving at the normal temperature of 25 ℃ and 1000r/min, then slowly dropwise adding 4-6 parts of ethylenediamine sodium triacetate or 3-5 parts of ethylenediamine tetraacetic acid disodium salt for 5min, dropwise adding 20-30 parts of polyepoxysuccinic acid for 15min, continuously dropwise adding 3-5 parts of initiator hydroxyethylidene diphosphonic acid for 5min, and then heating to 60 ℃ to prepare the acid activation initiator.
Preferably, the dropping of the benzotriazole and the acidic activation initiator is completed simultaneously, and the dropping time is 20-30 min.
Preferably, the surfactant is one of fatty alcohol-polyoxyethylene ether or octadecyl dimethyl betaine.
Preferably, the pH regulator is one of sodium hydroxide or potassium hydroxide.
Preferably, the method comprises the following steps: mixing and stirring the supermolecule scale remover monomer solution and the surfactant at the normal temperature of 25 ℃ at 1000r/min for 55-65min in proportion, and then adding a pH regulator to prepare the neutral scale remover.
Preferably, the pH value of the neutral detergent is 6.5-7.0.
Has the advantages that:
1. the scale remover prepared by the invention is safe and long-acting, can not have chemical reaction with scale and metal, can realize stripping and decomposition of the scale through dispersion and molecular assembly, and finally stably adheres to the surface of the metal, can remove oil scale, mud scale, crystal scale, rust scale and other insoluble scales which are difficult to be cleaned by conventional chemical cleaning, forms a compact protective film, can keep long-term stable operation of an oil well to prevent subsequent scale from being formed, and realizes long-acting scale removal and scale inhibition.
2. When in use, the neutral descaling agent is added into the system through a pump according to a certain proportion without pulling out a pipe column, so that online cleaning and descaling are realized, the operation cost is reduced, the economic loss is reduced, and the labor and maintenance cost is saved.
3. The pH value of the scale remover disclosed by the invention is 6.5-7.0, the agent does not corrode equipment, the corrosion degree of the agent on metal surfaces is far lower than the I-level standard specified by the oil field industry standard, and the scale remover belongs to an environment-friendly, pollution-free and long-acting scale removing and inhibiting system; the neutral scale remover has no heavy metal pollution, no pollution to the environment and safety to operators and equipment; the method is environment-friendly, the medicament is hermetically conveyed along with the crude oil, and the method has no environmental pollution and is green and environment-friendly.
Detailed Description
Example 1:
the neutral scale remover in the implementation comprises the following raw materials in parts by weight: 90 parts of supermolecule scale remover monomer solution, 7 parts of surfactant and 1 part of pH regulator; wherein, the synthesis steps of the supermolecule detergent monomer solution are as follows: adding 50 parts of absolute ethyl alcohol into a reaction kettle, then adding 2 parts of polyethylene glycol, stirring at 1000r/min, after complete dissolution, adding 5 parts of p-aminobenzoic acid, stirring at 1000r/min for 10min, raising the temperature to 60 ℃, then dropwise adding 7 parts of benzotriazole, and simultaneously dropwise adding an acidic activation initiator for 25 min. Heating to 80 ℃, and reacting for 8 hours to obtain the supermolecule scale remover monomer solution.
The acidic activated initiator comprises the following synthetic steps:
dissolving 3 parts of sodium silicate in 20 parts of absolute ethyl alcohol, stirring and dissolving at the normal temperature of 25 ℃ and 1000r/min, then slowly dropwise adding 4 parts of ethylenediamine sodium triacetate for 5min, dropwise adding 20 parts of polyepoxysuccinic acid for 15min, continuously dropwise adding 3 parts of initiator hydroxy ethylidene diphosphonic acid for 5min, and then heating to 60 ℃ to prepare the acidic activation initiator.
The surfactant is fatty alcohol-polyoxyethylene ether. The pH regulator is sodium hydroxide.
The preparation method of the neutral detergent comprises the following steps: mixing and stirring the supermolecule scale remover monomer solution and the surfactant at the normal temperature of 25 ℃ at 1000r/min for 55min, and then adding a pH regulator to prepare the neutral scale remover.
20g of the prepared neutral detergent stock solution capable of forming the long-acting scale-inhibiting film is diluted by distilled water or deionized water to prepare 100g, and the pH value is measured to be 6.8.
Example 2:
the neutral scale remover in the implementation comprises the following raw materials in parts by weight: 100 parts of supermolecule scale remover monomer solution, 5 parts of surfactant and 1 part of pH regulator; wherein, the synthesis steps of the supermolecule detergent monomer solution are as follows: adding 50 parts of absolute ethyl alcohol into a reaction kettle, then adding 3 parts of polyethylene glycol, stirring at 1000r/min, after complete dissolution, adding 5 parts of 4-aminobenzenesulfonic acid, stirring at 1000r/min for 10min, raising the temperature to 60 ℃, then dropwise adding 8 parts of benzotriazole, and dropwise adding an acid activation initiator for 30 min. Heating to 80 ℃, and reacting for 8 hours to obtain the supermolecule scale remover monomer solution.
The acidic activated initiator comprises the following synthetic steps:
dissolving 3 parts of sodium silicate in 20 parts of absolute ethyl alcohol, stirring and dissolving at the normal temperature of 25 ℃ and 1000r/min, then slowly dropwise adding 4 parts of sodium ethylene diamine tetracetate for 5min, dropwise adding 30 parts of polyepoxysuccinic acid for 15min, continuously dropwise adding 4 parts of initiator hydroxy ethylidene diphosphonic acid for 5min, and then heating to 60 ℃ to prepare the acid activation initiator.
The surfactant is octadecyl dimethyl betaine.
The pH regulator is sodium hydroxide.
The preparation method of the neutral detergent comprises the following steps: mixing and stirring the supermolecule scale remover monomer solution and the surfactant at the normal temperature of 25 ℃ at 1000r/min for 60min in proportion, and then adding a pH regulator to prepare the neutral scale remover.
20g of the prepared neutral detergent stock solution capable of forming the long-acting scale-inhibiting film is diluted by distilled water or deionized water to prepare 100g, and the pH value is measured to be 6.5.
Example 3:
the neutral scale remover in the implementation comprises the following raw materials in parts by weight: 101 parts of supermolecule scale remover monomer solution, 10 parts of surfactant and 1 part of pH regulator; wherein, the synthesis steps of the supermolecule detergent monomer solution are as follows: adding 50 parts of absolute ethyl alcohol into a reaction kettle, then adding 2 parts of polyethylene glycol, stirring at 1000r/min, after complete dissolution, adding 6 parts of p-aminobenzoic acid, stirring at 1000r/min for 10min, raising the temperature to 60 ℃, then dropwise adding 9 parts of benzotriazole, and simultaneously dropwise adding an acidic activation initiator for 20 min. Heating to 80 ℃, and reacting for 8 hours to obtain the supermolecule scale remover monomer solution.
The acidic activated initiator comprises the following synthetic steps:
dissolving 2 parts of sodium silicate in 20 parts of absolute ethyl alcohol, stirring and dissolving at the normal temperature of 25 ℃ and 1000r/min, then slowly dropwise adding 6 parts of ethylenediamine sodium triacetate for 5min, dropwise adding 25 parts of polyepoxysuccinic acid for 15min, continuously dropwise adding 5 parts of initiator hydroxy ethylidene diphosphonic acid for 5min, and then heating to 60 ℃ to prepare the acidic activation initiator.
The surfactant is fatty alcohol-polyoxyethylene ether. The pH regulator is potassium hydroxide.
The preparation method of the neutral detergent comprises the following steps: mixing and stirring the supermolecule scale remover monomer solution and the surfactant for 58min at the normal temperature of 25 ℃ at 1000r/min in proportion, and then adding a pH regulator to prepare the neutral scale remover.
20g of the prepared neutral detergent stock solution capable of forming the long-acting scale-inhibiting film is diluted by distilled water or deionized water to prepare 100g, and the pH value is measured to be 6.6.
Example 4:
the neutral scale remover in the implementation comprises the following raw materials in parts by weight: 105 parts of supermolecule scale remover monomer solution, 8 parts of surfactant and 1 part of pH regulator; wherein, the synthesis steps of the supermolecule detergent monomer solution are as follows: adding 50 parts of absolute ethyl alcohol into a reaction kettle, then adding 3 parts of polyethylene glycol, stirring at 1000r/min, after complete dissolution, adding 6 parts of 4-aminobenzenesulfonic acid, stirring at 1000r/min for 10min, raising the temperature to 60 ℃, then dropwise adding 7 parts of benzotriazole, and dropwise adding an acid activation initiator for 28 min. Heating to 80 ℃, and reacting for 8 hours to obtain the supermolecule scale remover monomer solution.
The acidic activated initiator comprises the following synthetic steps:
dissolving 2 parts of sodium silicate in 20 parts of absolute ethyl alcohol, stirring and dissolving at the normal temperature of 25 ℃ and 1000r/min, then slowly dropwise adding 5 parts of sodium ethylene diamine tetracetate for 5min, dropwise adding 30 parts of polyepoxysuccinic acid for 15min, continuously dropwise adding 4 parts of initiator hydroxy ethylidene diphosphonic acid for 5min, and then heating to 60 ℃ to prepare the acid activation initiator.
The surfactant is octadecyl dimethyl betaine.
The pH regulator is potassium hydroxide.
The preparation method of the neutral detergent comprises the following steps: mixing and stirring the supermolecule scale remover monomer solution and the surfactant at the normal temperature of 25 ℃ at 1000r/min for 65min, and then adding a pH regulator to prepare the neutral scale remover.
20g of the prepared neutral detergent stock solution capable of forming the long-acting scale-inhibiting film is diluted by distilled water or deionized water to prepare 100g, and the pH value is measured to be 6.9.
And (3) performance testing:
firstly, respectively taking the scale remover prepared by the invention, taking 5g of scale sample washed out from the oil field well, carrying out a scale removal experiment, and detecting the dissolution rate and the decomposition rate of soluble substances, wherein the experiment results are shown in the following table.
The final residue is mainly silt, and the neutral scale remover prepared by the method has good dissolution rate and decomposition rate on the scale washed out from the oil field well.
Secondly, taking 5g of oil field oil pipe column scale sample to carry out a scale removal experiment, and detecting the dissolution rate and the decomposition rate of soluble substances, wherein the experiment results are shown in the following table.
The final residue is mainly scrap iron and silt, and the neutral scale remover prepared by the method has good dissolution rate and decomposition rate on oil field oil pipe column scale as can be seen from the table.
It is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various insubstantial modifications of the inventive process concepts and solutions, or its application to other applications without modification.
Claims (7)
1. The neutral scale remover is characterized by comprising the following raw materials in parts by weight: 90-105 parts of supermolecule scale remover monomer solution, 5-10 parts of surfactant and 0-1 part of pH regulator; wherein, the synthesis steps of the supermolecule detergent monomer solution are as follows: adding 50 parts of absolute ethyl alcohol into a reaction kettle, then adding 2-3 parts of polyethylene glycol, stirring at 1000r/min, after complete dissolution, adding 5-6 parts of p-aminobenzoic acid or 5-6 parts of 4-aminobenzenesulfonic acid, stirring at 1000r/min for 10min, raising the temperature to 60 ℃, then dropwise adding 7-9 parts of benzotriazole, simultaneously dropwise adding an acid activation initiator, raising the temperature to 80 ℃, and reacting for 8h to obtain the supermolecule scale remover monomer solution.
2. The neutral detergent of claim 1, wherein said acidic activating initiator is synthesized by the steps of:
dissolving 2-3 parts of sodium silicate in 20 parts of absolute ethyl alcohol, stirring and dissolving at the normal temperature of 25 ℃ and 1000r/min, then slowly dropwise adding 4-6 parts of ethylenediamine sodium triacetate or 3-5 parts of ethylenediamine tetraacetic acid disodium salt for 5min, dropwise adding 20-30 parts of polyepoxysuccinic acid for 15min, continuously dropwise adding 3-5 parts of initiator hydroxyethylidene diphosphonic acid for 5min, and then heating to 60 ℃ to prepare the acid activation initiator.
3. The neutral detergent as claimed in claim 1, wherein the dropping of benzotriazole and the acidic activating initiator is completed simultaneously, and the dropping time is 20-30 min.
4. The neutral detergent of claim 1, wherein the surfactant is one of fatty alcohol-polyoxyethylene ether or octadecyl dimethyl betaine.
5. The neutral detergent of claim 1, wherein the pH adjuster is one of sodium hydroxide or potassium hydroxide.
6. The neutral detergent of claim 1, having a pH of 6.5-7.0.
7. The method for preparing a neutral detergent according to claim 1, comprising the steps of: mixing and stirring the supermolecule scale remover monomer solution and the surfactant at the normal temperature of 25 ℃ at 1000r/min for 55-65min in proportion, and then adding a pH regulator to prepare the neutral scale remover.
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| CN114426822A (en) * | 2020-09-18 | 2022-05-03 | 中国石油化工股份有限公司 | Self-recognition scale remover and preparation method thereof |
| CN114426822B (en) * | 2020-09-18 | 2023-06-16 | 中国石油化工股份有限公司 | Self-identification detergent and preparation method thereof |
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