CN115785932B - Lactic acid acidification corrosion inhibitor and preparation method thereof - Google Patents
Lactic acid acidification corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN115785932B CN115785932B CN202211396107.3A CN202211396107A CN115785932B CN 115785932 B CN115785932 B CN 115785932B CN 202211396107 A CN202211396107 A CN 202211396107A CN 115785932 B CN115785932 B CN 115785932B
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- Prior art keywords
- quinoline
- corrosion inhibitor
- lactic acid
- acidification corrosion
- acid acidification
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- 238000005260 corrosion Methods 0.000 title claims abstract description 57
- 230000007797 corrosion Effects 0.000 title claims abstract description 57
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000003112 inhibitor Substances 0.000 title claims abstract description 39
- 230000020477 pH reduction Effects 0.000 title claims abstract description 25
- 235000014655 lactic acid Nutrition 0.000 title claims abstract description 24
- 239000004310 lactic acid Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- OPJGHRHTIXTFBJ-UHFFFAOYSA-N 2-benzylquinoline hydrochloride Chemical compound C1=CC=C(C=C1)CC2=NC3=CC=CC=C3C=C2.Cl OPJGHRHTIXTFBJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims abstract description 7
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 4
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- NFXCUPVBISCOSF-UHFFFAOYSA-N propan-2-ol;dihydrochloride Chemical compound Cl.Cl.CC(C)O NFXCUPVBISCOSF-UHFFFAOYSA-N 0.000 claims description 7
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 239000012747 synergistic agent Substances 0.000 claims description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical group COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 3
- 235000019253 formic acid Nutrition 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 2
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 claims description 2
- 229940073608 benzyl chloride Drugs 0.000 claims description 2
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- 239000012153 distilled water Substances 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 7
- 230000005764 inhibitory process Effects 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000003786 synthesis reaction Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- -1 quinoline quaternary ammonium salt Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides a lactic acid acidification corrosion inhibitor and a preparation method thereof, which belong to the technical field of oilfield chemistry and can solve the problems of large dosage, low corrosion inhibition rate, complex synthesis process, large limitation of application range and the like of the existing corrosion inhibitor, and the lactic acid acidification corrosion inhibitor comprises the following components in percentage by mass: benzyl quinoline chloride: 8-15%, 1, 3-quinoline-2-hydroxypropane dichloride: 8-10% of alkylphenol polyoxyethylene ether: 4-5%, urotropin: 15-22%, synergist: 5-10% of water: 40-55%. The invention has simple synthesis process and low cost, can be prepared under normal pressure, has no pollution to the environment, and can be applied to different systems such as hydrochloric acid, earth acid, lactic acid and the like.
Description
Technical Field
The invention belongs to the technical field of oilfield chemistry, and particularly relates to a lactic acid acidification corrosion inhibitor and a preparation method thereof.
Background
In the petroleum exploitation process, acidification is a commonly adopted measure for oil and gas fields at home and abroad. However, acid liquor has a corrosion effect on metals, and particularly when high-concentration acid liquor is used for acidification, severe corrosion of equipment, downhole oil and casing is necessarily caused. The corrosion encountered during the acidification of the oil well is mainly electrochemical corrosion, and the existence of acid liquor leads the uneven structure of the steel surface to form a plurality of micro cells, thereby causing the steel corrosion.
In order to improve the development efficiency of the oil and gas well and the oil extraction rate, corrosion inhibitors are required to be injected in the construction process of the acidizing and fracturing technology. Corrosion inhibitor protection technology has become an important corrosion protection technology that is not replaced. Along with the continuous improvement of the attention of the corrosion inhibitor, the types of the corrosion inhibitor are more and more, the application range is wider, and the novel corrosion inhibitor is more green, environment-friendly and efficient. The commonly used corrosion inhibitor is mainly formed by attaching a layer of protective film on the surface of metal in an adsorption and coordination mode, so that the metal is isolated from the outside, and further corrosion of the metal in the metal is prevented.
However, in a practical working environment, the corrosion process of the material is quite complex. The use of one corrosion inhibitor alone does not achieve the desired effect.
Disclosure of Invention
Aiming at the problems of large dosage, low corrosion inhibition rate, complex synthesis process, large limitation of application range and the like of the existing corrosion inhibitor, the invention provides the compound lactic acid acidification corrosion inhibitor. The invention effectively improves the overall corrosion inhibition effect, and compounds with corrosion inhibition components are compounded for use, so that the components of the corrosion inhibitor have a common synergistic effect due to intermolecular synergistic effect, the consumption of the corrosion inhibitor is greatly reduced, and the use cost and the pollution to human bodies and the environment are reduced. The acidizing corrosion inhibitor has the characteristics of high temperature resistance, corrosion inhibition performance, and the like.
The invention adopts the following technical scheme:
the lactic acid acidification corrosion inhibitor comprises the following components in percentage by mass: benzyl quinoline chloride: 8-15%, 1, 3-quinoline-2-hydroxypropane dichloride: 8-10% of alkylphenol polyoxyethylene ether: 4-5%, urotropin: 15-22%, synergist: 5-10% of water: 40-55%.
Further, the lactic acid acidification corrosion inhibitor comprises the following components in percentage by mass: benzyl quinoline chloride: 10%, 1, 3-quinoline-2-hydroxypropane dichloride: 9% of alkylphenol ethoxylates: 5% urotropin: 18%, synergist: 8%, water: 50%.
Further, the alkylphenol ethoxylate is OP-10.
Further, the synergist comprises formic acid.
The preparation method of the lactic acid acidification corrosion inhibitor comprises the following steps:
firstly, adding benzyl quinoline chloride, 1, 3-quinoline dichloride-2-hydroxy propane and urotropine into a reaction container according to a proportion, then adding alkylphenol ethoxylates, and fully stirring to obtain a mixture;
secondly, adding water into the mixture obtained in the first step, and heating in a water bath kettle with the water bath temperature of 50-60 ℃ to enable the mixed solution to become clear and transparent;
thirdly, sequentially adding the synergistic agent, and uniformly stirring to obtain the lactic acid acidification corrosion inhibitor.
The effective corrosion inhibition components in the corrosion inhibitor are quinoline quaternary ammonium salt and urotropine.
Further, the preparation method of the benzyl quinoline chloride comprises the following steps:
26% of benzyl chloride and 20% of quinoline are added into a three-neck flask according to the mass ratio, distilled water with the mass ratio of 30% is added as a solvent, a stirrer is started, the reaction is carried out for 4 hours at the temperature of 80 ℃, and after the reaction is finished, the reaction product is directly taken out for standby.
Further, the preparation method of the 1, 3-quinoline dichloride-2-hydroxy propane comprises the following steps:
adding 20% concentrated hydrochloric acid and 20% quinoline into a three-neck flask, reacting at 40 ℃ to generate hydrochloride, increasing the temperature to 60 ℃, adding 15% epichlorohydrin, and reacting for 5 hours. After the reaction is finished, the product is 1, 3-quinoline dichloride-2-hydroxy propane.
The beneficial effects of the invention are as follows:
the invention provides a preparation method and application of a lactic acid acidification corrosion inhibitor, which has the advantages of simple synthesis process, low price, no pollution to the environment, and applicability to different systems such as hydrochloric acid, earth acid, lactic acid and the like, and can be prepared at normal pressure.
The preparation process is simple, and the production can be completed under normal pressure.
The lactic acid acidification corrosion inhibitor prepared by the invention has good water solubility, can be mutually dissolved with water in any ratio after a proper amount of alkylphenol ethoxylates are added, and does not need to additionally add alcohols or formamide substances as solvents.
The corrosion inhibitor has the advantages of small addition amount, low content, excellent performance and cost saving, and is an aqueous solution.
Drawings
FIG. 1 is a graph showing the film forming effect of a steel sheet using the corrosion inhibitor of the present invention.
Detailed Description
The lactic acid acidification corrosion inhibitor comprises the following components in percentage by mass: benzyl quinoline chloride: 8-15%, 1, 3-quinoline-2-hydroxypropane dichloride: 8-10% of alkylphenol polyoxyethylene ether: 4-5%, urotropin: 15-22%, synergist: 5-10% of water: 40-55%.
Further, the lactic acid acidification corrosion inhibitor comprises the following components in percentage by mass: benzyl quinoline chloride: 10%, 1, 3-quinoline-2-hydroxypropane dichloride: 9% of alkylphenol ethoxylates: 5% urotropin: 18%, synergist: 8%, water: 50%.
Adding benzyl quinoline chloride, 1, 3-quinoline dichloride-2-hydroxy propane and urotropine in sequence according to the mass ratio in a dry enamel reaction kettle, and then adding OP-10 for fully stirring;
adding water, heating at 50-60deg.C to make the solution become clear and transparent; and finally adding the synergistic agent formic acid to obtain the lactic acid acidification corrosion inhibitor.
And (3) evaluating corrosion inhibition effect:
static corrosion test evaluation conditions: the corrosion inhibitor addition amount of the N80 steel sheet at 90 ℃ is 1% after 4 hours of testing, and the corrosion rate results in different acid liquid systems are shown in the table:
dynamic corrosion test evaluation conditions: the corrosion inhibitor addition amount is 2% when the steel sheet is tested for 4 hours at 120 ℃ under the pressure of 16MPa, and the corrosion rate results in different acid liquid systems are shown in the table:
the above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (6)
1. A lactic acid acidification corrosion inhibitor, which is characterized in that: comprises the following components in percentage by mass: benzyl quinoline chloride: 8-15%, 1, 3-quinoline-2-hydroxypropane dichloride: 8-10% of alkylphenol polyoxyethylene ether: 4-5%, urotropin: 15-22%, synergist: 5-10% of water: 40-55%; the synergistic agent is formic acid.
2. A lactic acid acidification corrosion inhibitor according to claim 1, characterised in that: comprises the following components in percentage by mass: benzyl quinoline chloride: 10%, 1, 3-quinoline-2-hydroxypropane dichloride: 9% of alkylphenol ethoxylates: 5% urotropin: 18%, synergist: 8%, water: 50%.
3. A lactic acid acidification corrosion inhibitor according to claim 2, characterised in that: the alkylphenol ethoxylate is OP-10.
4. A method for preparing the lactic acid acidification corrosion inhibitor according to claim 1, which is characterized in that: the method comprises the following steps:
firstly, adding benzyl quinoline chloride, 1, 3-quinoline dichloride-2-hydroxy propane and urotropine into a reaction container according to a proportion, then adding alkylphenol ethoxylates, and fully stirring to obtain a mixture;
secondly, adding water into the mixture obtained in the first step, and heating in a water bath kettle with the water bath temperature of 50-60 ℃ to enable the mixed solution to become clear and transparent;
thirdly, sequentially adding the synergistic agent, and uniformly stirring to obtain the lactic acid acidification corrosion inhibitor.
5. The method for preparing the lactic acid acidification corrosion inhibitor according to claim 4, characterized in that: the preparation method of the benzyl quinoline chloride comprises the following steps:
26% of benzyl chloride and 20% of quinoline are added into a three-neck flask according to the mass ratio, distilled water with the mass ratio of 30% is added as a solvent, a stirrer is started, the reaction is carried out for 4 hours at the temperature of 80 ℃, and after the reaction is finished, the reaction product is directly taken out for standby.
6. The method for preparing the lactic acid acidification corrosion inhibitor according to claim 4, characterized in that: the preparation method of the 1, 3-quinoline dichloride-2-hydroxy propane comprises the following steps:
adding 20% concentrated hydrochloric acid and 20% quinoline into a three-neck flask, reacting at 40 ℃ to generate hydrochloride, adding 15% epichlorohydrin after raising the temperature to 60 ℃, and reacting for 5 hours, wherein the product is 1, 3-quinoline dichloride-2-hydroxy propane after the reaction is finished.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211396107.3A CN115785932B (en) | 2022-11-09 | 2022-11-09 | Lactic acid acidification corrosion inhibitor and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211396107.3A CN115785932B (en) | 2022-11-09 | 2022-11-09 | Lactic acid acidification corrosion inhibitor and preparation method thereof |
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| Publication Number | Publication Date |
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| CN115785932A CN115785932A (en) | 2023-03-14 |
| CN115785932B true CN115785932B (en) | 2023-11-14 |
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| CN101565608A (en) * | 2009-05-25 | 2009-10-28 | 新疆大学 | Preparation method of novel acidified corrosion inhibitor and use thereof |
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Family Cites Families (1)
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|---|---|---|---|---|
| US7994099B2 (en) * | 2009-04-14 | 2011-08-09 | Haliburton Energy Services, Inc. | Corrosion inhibitor compositions comprising an aldehyde and a thiol and/or an amine functionalized ring structure and associated methods |
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