CN111560616A - Neutralization corrosion inhibitor and preparation method thereof - Google Patents
Neutralization corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN111560616A CN111560616A CN202010566757.2A CN202010566757A CN111560616A CN 111560616 A CN111560616 A CN 111560616A CN 202010566757 A CN202010566757 A CN 202010566757A CN 111560616 A CN111560616 A CN 111560616A
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- quaternary ammonium
- ammonium salt
- imidazoline
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- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
Abstract
The invention provides a neutralization corrosion inhibitor and a preparation method thereof, wherein the neutralization corrosion inhibitor comprises the following components in percentage by weight: 10-20% of imidazoline quaternary ammonium salt, 5-10% of alkyl quaternary ammonium salt, 10-20% of alcohol amine, 0.1-0.3% of defoaming agent and the balance of solvent, wherein the solvent is methanol or deionized water, and the defoaming agent is polyether defoaming agent. The neutralization corrosion inhibitor provided by the invention has the advantages that the cooperativity among the components is good, the product performance is stable, the corrosion inhibition capability is strong, the corrosion of atmospheric and vacuum refining equipment and pipelines is well protected, and when metal is contacted with an acidic medium, imidazoline quaternary ammonium salt in the neutralization corrosion inhibitor can form a monomolecular film on the surface of the metal, so that the corrosion inhibition effect is realized; meanwhile, the quaternary ammonium salt macromolecules also have a large covering effect, and the alcohol amine can adsorb acid gas to form a stable compound without corrosiveness.
Description
Technical Field
The invention relates to the technical field of corrosion inhibitors, in particular to a neutralization corrosion inhibitor suitable for corrosion prevention and corrosion inhibition of atmospheric and vacuum refining equipment and pipelines and a preparation method thereof.
Background
In petroleum refining processes, the corrosive component present is H2S、CO2HCl, organic acids, etc., form various complex corrosion systems (e.g., H) in the presence of water2O-HCl-CO2And H2O-HC1-H2S, etc.), wherein the highly corrosive acid gases make refinery equipment and pipelines extremely corrosive. The corrosion of refinery equipment and pipelines can cause serious potential safety hazard, and the safety accident can be caused by the careless precaution, so that great economic loss is brought. Therefore, it is necessary to adopt anti-corrosion measures for control, and the addition of the corrosion inhibitor is an efficient, low-cost and simple-operation anti-corrosion measure.
Disclosure of Invention
In view of the above, the invention provides a neutralization corrosion inhibitor suitable for corrosion prevention and corrosion inhibition of atmospheric and vacuum refining equipment and pipelines and a preparation method thereof, and the neutralization corrosion inhibitor has the advantages of good synergy of all components, stable product performance and strong corrosion inhibition capability, and can well protect the corrosion of the atmospheric and vacuum refining equipment and pipelines.
On one hand, the invention provides a neutralization corrosion inhibitor, which comprises the following components in percentage by weight: 10-20% of imidazoline quaternary ammonium salt, 5-10% of alkyl quaternary ammonium salt, 10-20% of alcohol amine, 0.1-0.3% of defoaming agent and the balance of solvent, wherein the solvent is methanol or deionized water, and the defoaming agent is polyether defoaming agent.
Further, in the neutralization corrosion inhibitor, the imidazoline quaternary ammonium salt is benzoic acid imidazoline quaternary ammonium salt, and the synthesis steps of the benzoic acid imidazoline quaternary ammonium salt are as follows:
adding 80 mass percent of benzoic acid, triethylene tetramine and 20 mass percent of xylene into a three-neck flask with a water separator, a stirrer and a condenser respectively, adding zeolite, refluxing for 2 hours at 140-170 ℃, refluxing for about 2 hours at 180-210 ℃, cooling reactants to 110-140 ℃, and distilling for 2 hours under reduced pressure to obtain imidazoline;
adding isopropanol into 1-chloro-3-phenyl propane, heating to 80 ℃, then dropwise adding the isopropanol into the imidazoline obtained in the above steps, reacting for 3-5h at 90 ℃, and cooling to obtain a yellow brown liquid, namely the imidazoline benzoate quaternary ammonium salt.
Further, in the neutralization corrosion inhibitor, the molar ratio of the benzoic acid to the triethylene tetramine is 2:1, the molar ratio of the 1-chloro-3-phenyl propane to the benzoic acid is 1:2, and the mass ratio of the isopropanol to the 1-chloro-3-phenyl propane is 3: 1.
Further, in the neutralization corrosion inhibitor, the alkyl quaternary ammonium salt is octadecyl dimethyl benzyl ammonium chloride or dodecyl dimethyl benzyl ammonium chloride.
Further, in the neutralization corrosion inhibitor, the alcohol amine is one of N-methyldiethanolamine, monoethanolamine and diethanolamine.
Compared with the prior art, the neutralization corrosion inhibitor has the beneficial effects that the neutralization corrosion inhibitor provided by the invention has good cooperativity among the components, stable product performance and strong corrosion inhibition capability, and can well protect atmospheric and vacuum refining equipment and pipelines from corrosion, when metal is contacted with an acidic medium in the using process, imidazoline quaternary ammonium salt in the neutralization corrosion inhibitor can form a monomolecular film on the surface of the metal, so that the corrosion inhibition effect is achieved, and N atoms are quaternized to form cationic macromolecules which are easily adsorbed by metal active points with negative charges, so that the neutralization corrosion inhibitor has a great inhibition effect on hydrogen ion discharge, and the cathode reaction is effectively inhibited; meanwhile, the quaternary ammonium salt macromolecules also have a large covering effect, the alcohol amine can adsorb acid gas to form a stable compound without corrosiveness, on one hand, the using amount of the quaternary ammonium salt macromolecules in the using process is greatly reduced, and on the other hand, the quaternary ammonium salt macromolecules have a remarkable anticorrosion effect.
On the other hand, the invention also provides a preparation method of the neutralization corrosion inhibitor, which comprises the following steps:
s1, adding methanol or deionized water with a weight percentage of one half of a preset weight percentage as a solvent into a reaction kettle, sequentially adding alkyl quaternary ammonium salt with a preset weight percentage and imidazoline quaternary ammonium salt with a preset weight percentage into the reaction kettle, and stirring for 30 min;
s2, adding a polyether defoaming agent in a preset weight percentage into the reaction kettle in the step S1, continuously stirring and uniformly mixing, then adding alcohol amine in a preset weight percentage into the reaction kettle, supplementing the residual solvent into the reaction kettle, stirring for 30min until the solution is clear, and filtering the solution to obtain the neutralization corrosion inhibitor;
the preset weight percentages of the imidazoline quaternary ammonium salt, the alkyl quaternary ammonium salt, the alcohol amine and the defoaming agent are 10-20%, 5-10%, 10-20%, 0.1-0.3% in sequence, and the balance is the preset weight percentage of the solvent.
Further, in the preparation method of the neutralization corrosion inhibitor, the imidazoline quaternary ammonium salt is benzoic acid imidazoline quaternary ammonium salt, and the synthesis steps of the benzoic acid imidazoline quaternary ammonium salt are as follows:
adding 80 mass percent of benzoic acid, triethylene tetramine and 20 mass percent of xylene into a three-neck flask with a water separator, a stirrer and a condenser respectively, adding zeolite, refluxing for 2 hours at 140-170 ℃, refluxing for about 2 hours at 180-210 ℃, cooling reactants to 110-140 ℃, and distilling for 2 hours under reduced pressure to obtain imidazoline;
adding isopropanol into 1-chloro-3-phenyl propane, heating to 80 ℃, then dropwise adding the isopropanol into the imidazoline obtained in the above steps, reacting for 3-5h at 90 ℃, and cooling to obtain a yellow brown liquid, namely the imidazoline benzoate quaternary ammonium salt.
Further, in the preparation method of the neutralization corrosion inhibitor, the molar ratio of the benzoic acid to the triethylene tetramine is 2:1, the molar ratio of the 1-chloro-3-phenyl propane to the benzoic acid is 1:2, and the mass ratio of the isopropanol to the 1-chloro-3-phenyl propane is 3: 1.
Further, in the preparation method of the neutralization corrosion inhibitor, the alkyl quaternary ammonium salt is octadecyl dimethyl benzyl ammonium chloride or dodecyl dimethyl benzyl ammonium chloride.
Further, in the preparation method of the neutralization corrosion inhibitor, the alcohol amine is one of N-methyldiethanolamine, monoethanolamine and diethanolamine.
Compared with the prior art, the preparation method of the neutralization corrosion inhibitor provided by the invention has the beneficial effects that the preparation method of the neutralization corrosion inhibitor is simple, complex and expensive equipment is not needed, the operation difficulty is greatly reduced, the preparation cost is saved, when metal is contacted with an acidic medium in the use process of the prepared neutralization corrosion inhibitor, imidazoline quaternary ammonium salt in the neutralization corrosion inhibitor can form a monomolecular film on the surface of the metal, so that the corrosion inhibition effect is achieved, and since N atoms are quaternized into cationic macromolecules, the N atoms are easily adsorbed by metal active points with negative charges, and the hydrogen ion discharge is greatly inhibited, so that the cathode reaction is effectively inhibited; meanwhile, the quaternary ammonium salt macromolecules also have a large covering effect, the alcohol amine can adsorb acid gas to form a stable compound without corrosiveness, on one hand, the using amount of the quaternary ammonium salt macromolecules in the using process is greatly reduced, and on the other hand, the quaternary ammonium salt macromolecules have a remarkable anticorrosion effect.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of a method for preparing a neutralization corrosion inhibitor according to an embodiment of the present invention.
Detailed Description
For a further understanding of the invention, preferred embodiments of the invention are described below in conjunction with the examples, but it should be understood that these descriptions are included merely to further illustrate the features and advantages of the invention and are not intended to limit the invention to the claims.
On one hand, the invention provides a neutralization corrosion inhibitor suitable for corrosion prevention and corrosion inhibition of atmospheric and vacuum refining equipment and pipelines, which comprises the following raw materials: imidazoline quaternary ammonium salt, alkyl quaternary ammonium salt, alcohol amine, a defoaming agent and a solvent, wherein the raw materials comprise the following components in percentage by weight: 10-20% of imidazoline quaternary ammonium salt, 5-10% of alkyl quaternary ammonium salt, 10-20% of alcohol amine, 0.1-0.3% of defoaming agent and the balance of solvent.
Wherein the imidazoline quaternary ammonium salt is benzoic acid imidazoline quaternary ammonium salt; the alkyl quaternary ammonium salt is selected from one of octadecyl dimethyl benzyl ammonium chloride and dodecyl dimethyl benzyl ammonium chloride; the alcohol amine is selected from one of N-methyldiethanolamine, monoethanolamine and diethanolamine; the defoaming agent is polyether defoaming agent; the solvent is methanol or deionized water.
Preferably, the quaternary ammonium salt of benzoic imidazoline is synthesized by the following steps:
adding 80% by mass of benzoic acid and triethylene tetramine and 20% by mass of xylene into a three-neck flask with a water separator, a stirrer and a condenser, adding zeolite, refluxing for 2 hours at 140-170 ℃, refluxing for about 2 hours at 180-210 ℃, cooling reactants to 110-140 ℃, distilling for 2 hours under reduced pressure to remove xylene and unreacted organic amine to obtain imidazoline;
adding isopropanol into 1-chloro-3-phenyl propane, heating to 80 ℃, then dripping into imidazoline obtained from S21, reacting for 3-5h at about 90 ℃, and cooling to obtain a yellow brown liquid, namely imidazoline benzoate quaternary ammonium salt.
Preferably, in the synthesis process of the imidazoline quaternary ammonium benzoate, the molar ratio of the benzoic acid to the triethylene tetramine is 2:1, the molar ratio of the 1-chloro-3-phenylpropane to the benzoic acid is 1:2, and the mass ratio of the isopropanol to the 1-chloro-3-phenylpropane is 3: 1.
The neutralization corrosion inhibitor provided by the invention has the advantages that the cooperativity among the components is good, the product performance is stable, the corrosion inhibition capability is strong, the corrosion of normal and reduced pressure refining equipment and pipelines is well protected, when metal is contacted with an acidic medium in the using process, imidazoline quaternary ammonium salt in the neutralization corrosion inhibitor can form a monomolecular film on the surface of the metal, and then the corrosion inhibition effect is realized, and N atoms are quaternized to form cationic macromolecules, so that the cationic macromolecules are easily adsorbed by metal active points with negative charges, and the hydrogen ion discharge is greatly inhibited, so that the cathode reaction is effectively inhibited; meanwhile, the quaternary ammonium salt macromolecules also have a large covering effect, the alcohol amine can adsorb acid gas to form a stable compound without corrosiveness, on one hand, the using amount of the quaternary ammonium salt macromolecules in the using process is greatly reduced, and on the other hand, the quaternary ammonium salt macromolecules have a remarkable anticorrosion effect.
On the other hand, the invention provides a preparation method of a neutralization corrosion inhibitor, which comprises the following specific steps:
firstly, washing a reaction kettle, closing a discharge valve, adding about half of solvent into the reaction kettle, then sequentially adding alkyl quaternary ammonium salt and imidazoline quaternary ammonium salt, and stirring for 30 min; wherein the imidazoline quaternary ammonium salt is benzoic acid imidazoline quaternary ammonium salt, the alkyl quaternary ammonium salt is selected from one of octadecyl dimethyl benzyl ammonium chloride and dodecyl dimethyl benzyl ammonium chloride, and the solvent is methanol or deionized water.
Secondly, adding a defoaming agent into the reaction kettle, and continuously stirring and uniformly mixing; wherein the defoaming agent is polyether defoaming agent.
Finally, adding alcohol amine into the reaction kettle, then supplementing the rest solvent into the reaction kettle, stirring for 30min until the solution is clear, opening a discharge valve, and filtering to obtain a solution, namely the neutralization corrosion inhibitor in the invention; wherein, the alcohol amine is selected from one of N-methyldiethanolamine, monoethanolamine and diethanolamine, and the solvent is methanol or deionized water.
Preferably, the quaternary ammonium salt of benzoic imidazoline is synthesized by the following steps:
adding 80% by mass of benzoic acid and triethylene tetramine and 20% by mass of xylene into a three-neck flask with a water separator, a stirrer and a condenser, adding zeolite, refluxing for 2 hours at 140-170 ℃, refluxing for about 2 hours at 180-210 ℃, cooling reactants to 110-140 ℃, distilling for 2 hours under reduced pressure to remove xylene and unreacted organic amine to obtain imidazoline;
adding isopropanol into 1-chloro-3-phenyl propane, heating to 80 ℃, then dripping into imidazoline obtained from S21, reacting for 3-5h at about 90 ℃, and cooling to obtain a yellow brown liquid, namely imidazoline benzoate quaternary ammonium salt.
Preferably, in the synthesis process of the imidazoline quaternary ammonium benzoate, the molar ratio of the benzoic acid to the triethylene tetramine is 2:1, the molar ratio of the 1-chloro-3-phenylpropane to the benzoic acid is 1:2, and the mass ratio of the isopropanol to the 1-chloro-3-phenylpropane is 3: 1.
The preparation method of the neutralization corrosion inhibitor provided by the invention is simple, complex and expensive equipment is not needed, the operation difficulty is effectively reduced, the preparation cost is greatly saved, when metal is contacted with an acid medium in the using process of the prepared neutralization corrosion inhibitor, imidazoline quaternary ammonium salt in the neutralization corrosion inhibitor can form a monomolecular film on the surface of the metal, so that the corrosion inhibition effect is achieved, and N atoms are quaternized to form cationic macromolecules which are easily adsorbed by metal active points with negative charges, so that the neutralization corrosion inhibitor has a great inhibition effect on hydrogen ion discharge, and the cathode reaction is effectively inhibited; meanwhile, the quaternary ammonium salt macromolecules also have a large covering effect, the alcohol amine can adsorb acid gas to form a stable compound without corrosiveness, on one hand, the using amount of the quaternary ammonium salt macromolecules in the using process is greatly reduced, and on the other hand, the quaternary ammonium salt macromolecules have a remarkable anticorrosion effect.
The invention is further illustrated by the following specific examples:
example 1
The neutralization corrosion inhibitor provided by the invention comprises the following raw materials in parts by weight: 150 kg of imidazoline benzoate quaternary ammonium salt, 50 kg of octadecyl dimethyl benzyl ammonium chloride, 150 kg of N-methyldiethanolamine, 2 kg of polyether defoamer and 648 kg of deionized water.
Example 2
The neutralization corrosion inhibitor provided by the invention comprises the following raw materials in parts by weight: 200 kg of imidazoline benzoate quaternary ammonium salt, 50 kg of dodecyl dimethyl benzyl ammonium chloride, 150 kg of diethanolamine, 3 kg of polyether defoamer and 597 kg of deionized water.
Example 3
The neutralization corrosion inhibitor provided by the invention comprises the following raw materials in parts by weight: 180 kg of imidazoline benzoate quaternary ammonium salt, 80 kg of octadecyl dimethyl benzyl ammonium chloride, 200 kg of monoethanolamine, 2 kg of polyether defoamer and 538 kg of deionized water.
Example 4
The neutralization corrosion inhibitor provided by the invention comprises the following raw materials in parts by weight: 150 kg of imidazoline benzoate quaternary ammonium salt, 100 kg of dodecyl dimethyl benzyl ammonium chloride, 200 kg of N-methyldiethanolamine, 2 kg of polyether defoamer and 648 kg of deionized water.
Example 5
The neutralization corrosion inhibitor provided by the invention comprises the following raw materials in parts by weight: 200 kg of imidazoline benzoate quaternary ammonium salt, 100 kg of octadecyl dimethyl benzyl ammonium chloride, 200 kg of N-methyldiethanolamine, 2 kg of polyether defoamer and 498 kg of deionized water.
The performance of the neutralized corrosion inhibitors obtained in the above examples 1 to 5 was tested by tests, wherein the blank group was not added with the corrosion inhibitor, and the corrosion inhibitor added in the control group 1 was: 50% of benzoic acid imidazoline quaternary ammonium salt, 0.2% of polyether defoaming agent and the balance of water, wherein the corrosion inhibitor added in the control group 2 comprises the following components: 50% of octadecyl dimethyl benzyl ammonium chloride, 0.2% of polyether defoamer and the balance of water.
And (3) corrosion inhibition test: the material of the solution hanging piece to be tested is # 20, the test temperature is 70 ℃, the test time is 72h, and the test results are shown in table 1.
TABLE 1 Corrosion inhibition test results
| Inhibitor adding medicine concentration (mg/L) | Corrosion Rate (mm/a) | Inhibition ratio (%) | |
| Blank space | / | 0.196 | / |
| Example 1 | 20 | 0.030 | 84.7 |
| Example 2 | 20 | 0.013 | 93.4 |
| Example 3 | 20 | 0.010 | 94.9 |
| Example 4 | 20 | 0.020 | 89.8 |
| Example 5 | 20 | 0.008 | 95.9 |
| Control group 1 | 20 | 0.022 | 88.8 |
| Control group 2 | 20 | 0.029 | 85.2 |
From the above table it can be derived: the components in the neutralization corrosion inhibitor provided by the invention have good cooperativity, stable product performance and strong corrosion inhibition capability, and can well protect atmospheric and vacuum refining equipment and pipelines from corrosion.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The neutralization corrosion inhibitor is characterized by comprising the following components in percentage by weight: 10-20% of imidazoline quaternary ammonium salt, 5-10% of alkyl quaternary ammonium salt, 10-20% of alcohol amine, 0.1-0.3% of defoaming agent and the balance of solvent, wherein the solvent is methanol or deionized water, and the defoaming agent is polyether defoaming agent.
2. The neutralization corrosion inhibitor as claimed in claim 1, wherein the imidazoline quaternary ammonium salt is imidazoline benzoate quaternary ammonium salt, and the synthesis steps of the imidazoline benzoate quaternary ammonium salt are as follows:
adding 80 mass percent of benzoic acid, triethylene tetramine and 20 mass percent of xylene into a three-neck flask with a water separator, a stirrer and a condenser respectively, adding zeolite, refluxing for 2 hours at 140-170 ℃, refluxing for about 2 hours at 180-210 ℃, cooling reactants to 110-140 ℃, and distilling for 2 hours under reduced pressure to obtain imidazoline;
adding isopropanol into 1-chloro-3-phenyl propane, heating to 80 ℃, then dropwise adding the isopropanol into the imidazoline obtained in the above steps, reacting for 3-5h at 90 ℃, and cooling to obtain a yellow brown liquid, namely the imidazoline benzoate quaternary ammonium salt.
3. The neutralization corrosion inhibitor according to claim 2, wherein the molar ratio of the benzoic acid to the triethylene tetramine is 2:1, the molar ratio of the 1-chloro-3-phenylpropane to the benzoic acid is 1:2, and the mass ratio of the isopropanol to the 1-chloro-3-phenylpropane is 3: 1.
4. The neutralization corrosion inhibitor according to claim 1, wherein the alkyl quaternary ammonium salt is octadecyl dimethyl benzyl ammonium chloride or dodecyl dimethyl benzyl ammonium chloride.
5. The neutralization corrosion inhibitor according to claim 1, wherein the alcohol amine is one of N-methyldiethanolamine, monoethanolamine and diethanolamine.
6. The preparation method of the neutralization corrosion inhibitor is characterized by comprising the following steps:
s1, adding methanol or deionized water with a weight percentage of one half of a preset weight percentage as a solvent into a reaction kettle, sequentially adding alkyl quaternary ammonium salt with a preset weight percentage and imidazoline quaternary ammonium salt with a preset weight percentage into the reaction kettle, and stirring for 30 min;
s2, adding a polyether defoaming agent in a preset weight percentage into the reaction kettle in the step S1, continuously stirring and uniformly mixing, then adding alcohol amine in a preset weight percentage into the reaction kettle, supplementing the residual solvent into the reaction kettle, stirring for 30min until the solution is clear, and filtering the solution to obtain the neutralization corrosion inhibitor;
the preset weight percentages of the imidazoline quaternary ammonium salt, the alkyl quaternary ammonium salt, the alcohol amine and the defoaming agent are 10-20%, 5-10%, 10-20%, 0.1-0.3% in sequence, and the balance is the preset weight percentage of the solvent.
7. The method for preparing the neutralization corrosion inhibitor according to claim 6, wherein the imidazoline quaternary ammonium salt is imidazoline benzoate quaternary ammonium salt, and the synthesis steps of the imidazoline benzoate quaternary ammonium salt are as follows:
adding 80 mass percent of benzoic acid, triethylene tetramine and 20 mass percent of xylene into a three-neck flask with a water separator, a stirrer and a condenser respectively, adding zeolite, refluxing for 2 hours at 140-170 ℃, refluxing for about 2 hours at 180-210 ℃, cooling reactants to 110-140 ℃, and distilling for 2 hours under reduced pressure to obtain imidazoline;
adding isopropanol into 1-chloro-3-phenyl propane, heating to 80 ℃, then dropwise adding the isopropanol into the imidazoline obtained in the above steps, reacting for 3-5h at 90 ℃, and cooling to obtain a yellow brown liquid, namely the imidazoline benzoate quaternary ammonium salt.
8. The preparation method of the neutralization corrosion inhibitor according to claim 6, wherein the molar ratio of the benzoic acid to the triethylene tetramine is 2:1, the molar ratio of the 1-chloro-3-phenyl propane to the benzoic acid is 1:2, and the mass ratio of the isopropanol to the 1-chloro-3-phenyl propane is 3: 1.
9. The method for preparing the neutralization corrosion inhibitor according to claim 6, wherein the alkyl quaternary ammonium salt is octadecyl dimethyl benzyl ammonium chloride or dodecyl dimethyl benzyl ammonium chloride.
10. The method for preparing the neutralization corrosion inhibitor according to claim 6, wherein the alcohol amine is one of N-methyldiethanolamine, monoethanolamine and diethanolamine.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114907821A (en) * | 2022-05-30 | 2022-08-16 | 湖南车瑞科技股份有限公司 | Special cooling liquid for wind power and preparation method thereof |
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| CN109504438A (en) * | 2018-11-16 | 2019-03-22 | 江苏科创石化有限公司 | One kind plus hydrogen corrosion inhibiter |
| CN110157402A (en) * | 2018-03-27 | 2019-08-23 | 德蓝水技术股份有限公司 | A kind of antibacterial anti-H of salt tolerant2S/CO2Corrosion inhibiter and preparation method thereof |
| CN110655955A (en) * | 2019-11-01 | 2020-01-07 | 武汉三友石化有限公司 | Neutralization corrosion inhibitor and preparation method thereof |
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| CN102942908A (en) * | 2012-11-22 | 2013-02-27 | 中国海洋石油总公司 | Water injected pitting-corrosion composite inhibitor and application thereof |
| CN110157402A (en) * | 2018-03-27 | 2019-08-23 | 德蓝水技术股份有限公司 | A kind of antibacterial anti-H of salt tolerant2S/CO2Corrosion inhibiter and preparation method thereof |
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| CN110655955A (en) * | 2019-11-01 | 2020-01-07 | 武汉三友石化有限公司 | Neutralization corrosion inhibitor and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110157402A (en) * | 2018-03-27 | 2019-08-23 | 德蓝水技术股份有限公司 | A kind of antibacterial anti-H of salt tolerant2S/CO2Corrosion inhibiter and preparation method thereof |
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Application publication date: 20200821 |