CN112979492B - Poly-Mannich base and preparation method and application thereof - Google Patents
Poly-Mannich base and preparation method and application thereof Download PDFInfo
- Publication number
- CN112979492B CN112979492B CN201911273502.0A CN201911273502A CN112979492B CN 112979492 B CN112979492 B CN 112979492B CN 201911273502 A CN201911273502 A CN 201911273502A CN 112979492 B CN112979492 B CN 112979492B
- Authority
- CN
- China
- Prior art keywords
- base
- polymann
- saturated
- poly
- corrosion inhibitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C239/00—Compounds containing nitrogen-to-halogen bonds; Hydroxylamino compounds or ethers or esters thereof
- C07C239/08—Hydroxylamino compounds or their ethers or esters
- C07C239/20—Hydroxylamino compounds or their ethers or esters having oxygen atoms of hydroxylamino groups etherified
-
- 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
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/147—Nitrogen-containing compounds containing a nitrogen-to-oxygen bond
Abstract
The invention provides a polymann-nich base and a preparation method and application thereof. The polymann base has a structure represented by the following formula 1:
formula 1, wherein n=2-4. The preparation method of the polymann-nich base comprises the following steps: uniformly mixing ethylenediamine, formaldehyde, phenol or p-alkylphenol, regulating the pH value of the mixed solution, and carrying out reflux reaction and post-treatment to obtain the poly-Mannich base. The invention also provides a poly-Mannich base saturated CO 2 Brine corrosion inhibitor comprising the above mentioned polymann-base. The invention also provides the saturated CO of the poly-Mannich base 2 Brine corrosion inhibitor CO at 80-120 ℃ in oil field 2 The application in brine corrosion construction. The invention provides a poly-Mannich base saturated CO 2 The brine corrosion inhibitor has the characteristics of high temperature resistance, good compatibility, excellent corrosion inhibition performance, high stability and the like, has low cost and simple method, is favorable for large-scale production and popularization and application, and can be widely applied to saturated CO 2 Brine corrosion inhibition system.
Description
Technical Field
The invention relates to the technical field of oilfield brine pipeline corrosion prevention construction, in particular to a polymann-nich base and a preparation method and application thereof.
Background
Along with CO injection 2 Popularization and use of oil extraction technology, CO 2 Brine corrosion problems are becoming more and more interesting. CO when injected into an oil and gas well 2 When the partial pressure of (a) reaches a certain level, the corrosion and the failure of the down-hole tubular column can be caused, and serious economic loss is brought to the petroleum and natural gas industry. Brine is susceptible to pitting, most commonly sodium chloride corrosion. Because the radius of chloride ions is small, the activity in the medium is strong, and the chloride ions can be preferentially and selectively adsorbed on the passivation film to replace hydroxyl plasma adsorbed before, so that soluble chloride is formed with metal to cause local corrosion such as pitting corrosion, crevice corrosion, stress corrosion and the like.
Currently, the addition of corrosion inhibitors is the most cost effective corrosion protection measure. The commonly used corrosion inhibitors in China mainly comprise imidazolines, mannich bases, schiff bases, pyridine, derivatives thereof and the like, wherein the Mannich bases (Mannich) are widely applied to oil fields due to good corrosion inhibition effects. The corrosion inhibition mechanism of the Mannich base corrosion inhibitor is an adsorption theory, and the Mannich base contains a large number of atoms with lone pair electrons such as N, O and can be adsorbed on the d orbit of Fe atoms to form a film, so that the state of the charge on the surface of the metal and the double-electric-layer structure formed by the metal in a corrosive medium are changed, and the corrosion rate is reduced. However, the conventional Mannich base corrosion inhibitors are mainly single and double Mannich bases, and the conventional Mannich base corrosion inhibitors are difficult to achieve expected effects under complex oilfield corrosion environments. Therefore, there is a need to develop a more efficient, environment-friendly and field-adaptive poly-Mannich base corrosion inhibitor for solving the problem of CO 2 Brine corrosion problems.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a polymann-nich base and a preparation method and application thereof. The poly-Mannich base has excellent high temperature resistance, compatibility, stability and good corrosion inhibition performance, and can be used as saturated CO 2 Corrosion inhibitor for carbon steel in brine solution.
In order to achieve the above purpose, the invention provides a polymann's base, the chemical structure of which is shown in formula 1:
wherein n=2-4.
The invention also provides a preparation method of the poly-Mannich base, which comprises the following steps:
uniformly mixing ethylenediamine, formaldehyde, phenol or p-alkylphenol according to the mass ratio of (0.5-2) to obtain a mixed solution, regulating the pH value of the mixed solution, and carrying out reflux reaction;
and (3) carrying out reduced pressure distillation and acetone precipitation on the reaction product, and carrying out suction filtration and drying to obtain the poly-Mannich base.
In the above preparation method, preferably, the ratio of the amounts of the materials of ethylenediamine, formaldehyde and phenol is 1:2:1.
In the above preparation method, preferably, the pH of the mixed solution is 9.5 to 10.5, more preferably, the pH of the mixed solution is 10. In particular embodiments, naOH and/or NaOH solutions may be used to adjust the pH of the mixed solution to 9.5-10.5.
In the above preparation method, preferably, the temperature of the reflux reaction is 80 to 100 ℃, more preferably, the temperature of the reflux reaction is 80 ℃.
In the above preparation method, the time of the reflux reaction is preferably 4 to 6 hours, more preferably, the time of the reflux reaction is 5 hours.
According to a specific embodiment of the invention, the above preparation method gives a yield of the polymann-nich base of more than 95%.
The invention also provides a poly-Mannich base saturated CO 2 Brine corrosion inhibitor comprising the above mentioned polymann-nich base.
According to a particular embodiment of the invention, preferably, the polymann-base saturates CO in mass percent 2 The brine corrosion inhibitor comprises 0.04% (wt) of the polymann base and 3% (wt) of NaCl.
The invention also provides the saturated CO of the poly-Mannich base 2 Brine corrosion inhibitor CO at 80-120 ℃ in oil field 2 The application in the construction of brine corrosion.
The invention has the beneficial effects that:
(1) The preparation method of the poly-Mannich base provided by the invention has the advantages of low cost and simple method, and the yield of the obtained poly-Mannich base is more than 95%.
(2) The invention provides a poly-Mannich base saturated CO 2 Saturated CO with brine corrosion inhibitor at 50 DEG C 2 Under the saline water condition, when the addition amount is 400mg/L, the corrosion inhibition rate can reach 77.02 percent, the corrosion rate is 0.0533mm/a (less than or equal to 0.076 mm/a), and the method meets the industry standard SY/T5273-2000 of China petroleum and natural gas group company (corrosion inhibitor performance evaluation method for oilfield produced water);
(3) The invention provides a poly-Mannich base saturated CO 2 Saturated CO with salt water corrosion inhibitor at 80-120 DEG C 2 Under the saline condition, the corrosion inhibition effect can be continuously exerted for 6-10 days, and the pollution to soil environment and the like is small;
(4) The invention provides a poly-Mannich base saturated CO 2 The brine corrosion inhibitor has stable chemical property, is easy to store and transport, and has higher construction safety;
(5) The invention provides a poly-Mannich base saturated CO 2 Brine corrosion inhibitors and oilfield chemicals (e.g., fe 3+ Stabilizers, demulsifiers, scale inhibitors, precipitation inhibitors, etc.) have relatively good compatibility, and the application range is increased;
(6) The invention provides a poly-Mannich base saturated CO 2 The saline corrosion inhibitor has the advantages of wide raw material sources, low cost, simple preparation method, and suitability for large-scale production and popularization and application, and can be widely applied to saturated CO 2 Brine corrosion inhibition system.
Drawings
FIG. 1 is a mass spectrum of the product f prepared in test example 1.
FIG. 2 is an infrared spectrum of the product f prepared in test example 1.
Detailed Description
The technical solution of the present invention will be described in detail below for a clearer understanding of technical features, objects and advantageous effects of the present invention, but should not be construed as limiting the scope of the present invention.
Example 1
The embodiment provides a preparation method of a polymann-nich base, which specifically comprises the following operations:
respectively adding ethylenediamine, formaldehyde and phenol into a three-neck flask according to the mass ratio of 1:1:1, uniformly mixing, regulating the pH value to 9.5-10.5 by using NaOH and/or NaOH solution, heating to 80 ℃, and carrying out reflux reaction for 5h;
after the reaction is finished, the reaction product is subjected to reduced pressure distillation and acetone precipitation, and the product a is obtained after suction filtration and drying.
Example 2
The embodiment provides a preparation method of a polymann-nich base, which specifically comprises the following operations:
respectively adding ethylenediamine, formaldehyde and phenol into a three-neck flask according to the mass ratio of 1:1:2, uniformly mixing, regulating the pH value to 9.5-10.5 by using NaOH and/or NaOH solution, heating to 80 ℃, and carrying out reflux reaction for 5h;
after the reaction is finished, the reaction product is subjected to reduced pressure distillation, acetone precipitation treatment, suction filtration and drying to obtain a product b.
Example 3
The embodiment provides a preparation method of a polymann-nich base, which specifically comprises the following operations:
respectively adding ethylenediamine, formaldehyde and phenol into a three-neck flask according to the mass ratio of 2:1:1, uniformly mixing, regulating the pH value to 9.5-10.5 by using NaOH and/or NaOH solution, heating to 80 ℃, and carrying out reflux reaction for 5h;
after the reaction is finished, the reaction product is subjected to reduced pressure distillation, acetone precipitation treatment, suction filtration and drying to obtain a product c.
Example 4
The embodiment provides a preparation method of a polymann-nich base, which specifically comprises the following operations:
respectively adding ethylenediamine, formaldehyde and phenol into a three-neck flask according to the mass ratio of 2:2:1, uniformly mixing, regulating the pH value to 9.5-10.5 by using NaOH and/or NaOH solution, heating to 80 ℃, and carrying out reflux reaction for 5h;
after the reaction is finished, the reaction product is subjected to reduced pressure distillation, acetone precipitation treatment, suction filtration and drying to obtain a product d.
Example 5
The embodiment provides a preparation method of a polymann-nich base, which specifically comprises the following operations:
respectively adding ethylenediamine, formaldehyde and phenol into a three-neck flask according to the mass ratio of 1:2:1, uniformly mixing, regulating the pH value to 9.5-10.5 by using NaOH and/or NaOH solution, heating to 80 ℃, and carrying out reflux reaction for 5h;
after the reaction is finished, the reaction product is subjected to reduced pressure distillation, acetone precipitation treatment, suction filtration and drying to obtain a product e. The reaction formula of the preparation method in this example is shown in formula 2:
wherein n=2-4.
Test example 1 structural verification
In preparing a sample of the polymann base for spectroscopic analysis, it is necessary to replace the O-Na groups in the reaction product with O-H groups for the purpose of detecting phenolic hydroxyl groups in the polymann base. The specific preparation process of the sample for spectrum is as follows:
respectively adding ethylenediamine, formaldehyde and phenol into a three-neck flask according to the mass ratio of 1:2:1, uniformly mixing, regulating the pH value to 9.5-10.5 by using NaOH and/or NaOH solution, heating to 80 ℃, and carrying out reflux reaction for 5h;
regulating the pH value of the reacted system to 3 by using dilute HCl, carrying out reduced pressure distillation and acetone precipitation treatment on the product, and carrying out suction filtration and drying to obtain a product f for spectrum characterization, wherein the structural formula of the product f is shown as formula 3:
The reaction formula in the preparation process of the product is shown as formula 4:
wherein n=2-4.
FIG. 1 is a mass spectrum of product f. The molecular ion peaks appearing in the a, b and c diagrams of fig. 1 have relative molecular masses 374.1, 552 and 730, respectively, and their corresponding n is 2, 3 and 4, respectively. The product f was shown to contain n=2, 3, 4 polymann bases.
Fig. 2 is an infrared spectrum of the product f, which is identical when n=2, 3, 4. As can be seen from FIG. 2, 3415cm in the infrared spectrum of the product f -1 Stretching vibration peaks attributed to N-H and O-H; 2937cm -1 Belongs to a methylene symmetrical telescopic vibration peak; 1647cm -1 Belongs to a benzene ring C=C bond stretching vibration peak; 1596cm -1 Belongs to the vibration absorption peak of benzene ring framework; 1463cm -1 Due to methylene shear vibrations; 1257cm -1 And 755cm -1 Respectively belonging to the absorption peak of the expansion vibration of the C-O bond and the C-H in-plane swinging vibration.
The results of characterization of the polymann base by infrared spectroscopy and mass spectrometry prove that the method provided by the invention can be used for synthesizing the needed polymann base molecules.
The prepared poly-Mannich base can be used as saturated CO 2 Brine corrosion inhibitor applied to CO at 80-120 ℃ in oil field 2 In the construction of brine corrosion.
Test example 2 evaluation of Corrosion inhibition Properties
The corrosion inhibition performance of the polymann bases (products a-e) prepared in examples 1-5 was tested by: at 50℃in saturated CO containing 3% (wt) NaCl 2 A72 h static weight loss experiment was performed with carbon steel in an aqueous salt solution, wherein the used polymann-base was saturated with CO 2 Salt water-solubleThe concentration in the liquid was 400mg/L. Specific test conditions and evaluation criteria are carried out according to QSY126-2014 edition of technical requirement of corrosion and scale inhibitor for oilfield water treatment, the test example also uses a conventional corrosion inhibitor (WD-3 corrosion inhibitor) used in the field as a comparison, corrosion inhibition performance is tested by adopting the conditions, and test results are summarized in Table 1:
TABLE 1 influence of different ratios on corrosion rate and Corrosion inhibition
Note that: WD-3 corrosion inhibitor is purchased from Kangfu chemical technology development Co., ltd
As can be seen from Table 1, the poly (Mannich base) prepared in different proportions is tested at 400mg/L, i.e., 0.04% by weight, and lower for saturated CO, with very low levels of poly (Mannich base) prepared in examples 1-5 (corrosion inhibitor addition typically being controlled to 0.1% by weight in practice) 2 The carbon steel in the salt water solution system has good corrosion inhibition effect. Among them, the poly Mannich base (product e) prepared in example 5 with a reactant ratio of 1:2:1 has the best corrosion inhibition effect, the corrosion rate is 0.0533mm/a, and the corrosion inhibition rate is 77.02%. The corrosion rates measured by the poly Mannich (product a, b, d, e) alkali prepared in examples 1, 2, 4 and 5 are all smaller than 0.076mm/a, and meet the industrial standard SY/T5273-2000 corrosion inhibitor performance evaluation method for oilfield produced water of China Petroleum and Natural gas group company.
The corrosion inhibition performance of the pure polymann-base (product e) prepared in example 5 was tested with it as corrosion inhibitor: in saturated CO containing 3wt% (wt) NaCl 2 The static weightlessness experiment is carried out by using carbon steel in the saline solution, the specific test method and the evaluation standard are carried out according to QSY126-2014 edition of technical requirement of corrosion and scale inhibitor for oilfield water treatment, the evaluation temperature, the evaluation time and the addition amount of the poly Mannich base corrosion inhibitor are changed, and the test results are summarized in Table 2:
TABLE 2 influence of different evaluation temperatures, evaluation times or addition of corrosion inhibitors on the corrosion rate (mm/a)
As can be seen from table 2, when ethylenediamine: formaldehyde: when the ratio of the substances of phenol is 1:2:1 and the addition amount of the corrosion inhibitor is 900mg/L, the poly-Mannich base corrosion inhibitor is saturated CO containing 3t% (wt) NaCl 2 In the saline solution, curing is carried out for 240 hours at 120 ℃, the corrosion rate is 0.0735mm/a, and the corrosion rate meets the requirement of the enterprise standard of 0.076mm/a.
Test example 3 evaluation of emulsion tendency
The emulsion tendency of the poly Mannich base prepared in examples 1-5 as a corrosion inhibitor was evaluated by referring to the test method and standard of SY/T5273-2000 corrosion inhibitor performance evaluation method for oilfield produced water, the oil-water interface of the plugged cylinder with the corrosion inhibitor was clear when left to stand for 10min, and the water yield and the emulsion layer thickness were approximately equal to those of the blank test when left to stand for 60 min. From the test results, the poly Mannich base corrosion inhibitor provided by the invention has no emulsifying tendency and stable property.
Test results of test examples 2-3 prove that the polymann-nich base provided by the invention can be used as a corrosion inhibitor for inhibiting the corrosion inhibition process of carbon steel and has stability; the Polymannich base can be saturated CO at 80-120 DEG C 2 The corrosion inhibition effect is kept good under the saline solution condition, and the method has a great application prospect in the saline corrosion construction of oil fields.
Claims (7)
1. Polymannich base saturated CO 2 A brine corrosion inhibitor comprising a polymann-nich base;
the chemical structure of the poly Mannich base is shown as formula 1:
wherein n=2-4;
the preparation method of the polymann-nich base comprises the following steps:
uniformly mixing ethylenediamine, formaldehyde and phenol according to the mass ratio of (0.5-2) to obtain a mixed solution, regulating the pH value of the mixed solution to 9.5-10.5 by adopting NaOH, and carrying out reflux reaction; performing reduced pressure distillation and acetone precipitation on a reaction product, and performing suction filtration and drying to obtain the poly-Mannich base;
wherein the temperature of the reflux reaction is 80-100 ℃, and the time of the reflux reaction is 4-6 hours.
2. The polymann-base saturated CO of claim 1 2 And the brine corrosion inhibitor is characterized in that the mass ratio of the ethylenediamine, formaldehyde and phenol is 1:2:1.
3. The polymann-base saturated CO of claim 1 2 And the pH value of the mixed solution is 10.
4. The polymann-base saturated CO of claim 1 2 And brine corrosion inhibitor, wherein the temperature of the reflux reaction is 80 ℃.
5. The polymann base saturated CO of claim 1 or 4 2 And brine corrosion inhibitor, wherein the time of the reflux reaction is 5 hours.
6. The polymann-base saturated CO of claim 1 2 Brine corrosion inhibitor, wherein the polymann-base is saturated with CO in mass percent 2 The brine corrosion inhibitor comprises 0.04% of the polymann-base by mass and 3% of NaCl by mass.
7. The polymann-base saturated CO of any one of claims 1-6 2 Brine corrosion inhibitor CO at 80-120 ℃ in oil field 2 The application in the construction of brine corrosion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273502.0A CN112979492B (en) | 2019-12-12 | 2019-12-12 | Poly-Mannich base and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273502.0A CN112979492B (en) | 2019-12-12 | 2019-12-12 | Poly-Mannich base and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112979492A CN112979492A (en) | 2021-06-18 |
| CN112979492B true CN112979492B (en) | 2023-06-30 |
Family
ID=76331554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911273502.0A Active CN112979492B (en) | 2019-12-12 | 2019-12-12 | Poly-Mannich base and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112979492B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153978A (en) * | 2011-03-11 | 2011-08-17 | 中南林业科技大学 | Room-temperature solidification heat-resistant epoxy adhesive |
| CN103897125A (en) * | 2014-03-31 | 2014-07-02 | 山东圣泉化工股份有限公司 | Method for preparing thermosetting phenol resin |
| CN109021188A (en) * | 2018-08-29 | 2018-12-18 | 江苏苏博特新材料股份有限公司 | A kind of modified phenolic amine condensation polymer cement grinding aid, preparation method and its application |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4131551A (en) * | 1977-08-15 | 1978-12-26 | Standard Oil Company | Railway lubricating oil |
-
2019
- 2019-12-12 CN CN201911273502.0A patent/CN112979492B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153978A (en) * | 2011-03-11 | 2011-08-17 | 中南林业科技大学 | Room-temperature solidification heat-resistant epoxy adhesive |
| CN103897125A (en) * | 2014-03-31 | 2014-07-02 | 山东圣泉化工股份有限公司 | Method for preparing thermosetting phenol resin |
| CN109021188A (en) * | 2018-08-29 | 2018-12-18 | 江苏苏博特新材料股份有限公司 | A kind of modified phenolic amine condensation polymer cement grinding aid, preparation method and its application |
Non-Patent Citations (4)
| Title |
|---|
| Production of corrosion inhibitors based on commercial alkylphenol;Abdullaev,G.K.等;《ACS STN》;19711231;1-3 * |
| 一种适用于CO2h驱缓蚀阻垢剂（体系）的研发与性能评价;邹玉琴;《中国优秀博硕士学位论文全文数据库（硕士）工程科技I辑》;20190715;第3-7页 * |
| 抑制CO2及盐水腐蚀的曼尼希碱缓蚀剂的合成及性能评价;邹玉琴等;《云南化工》;20180630;第32-35页 * |
| 珠状酚醛系氨基磷酸树脂的制备及其鳌合性能;马千里;《离子交换与吸附》;20001231;239-246 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112979492A (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20170198194A1 (en) | Asphaltene inhibitors for squeeze applications | |
| CN107418549B (en) | Composite acidizing corrosion inhibitor capable of resisting temperature of 120-140 DEG C | |
| CN111748048B (en) | Preparation method of modified chitosan acidizing corrosion inhibitor | |
| US20200331856A1 (en) | Process for preparing mannich base quaternary ammonium salt high-temperature resistant corrosion inhibitor and applications thereof | |
| CN110577829A (en) | Cinnamaldehyde Schiff base acidizing corrosion inhibitor, preparation and use method | |
| Jiang et al. | A double‐tailed acrylamide hydrophobically associating polymer: Synthesis, characterization, and solution properties | |
| CN108467366B (en) | Thiourea-modified imidazoline derivative corrosion inhibitor and preparation method and application thereof | |
| CN111333857B (en) | Shale inhibitor and water-based drilling fluid | |
| CN111607375A (en) | Anti-swelling shrinkage expansion agent for low-permeability sensitive oil reservoir and preparation method thereof | |
| Chen et al. | Synthesis and evaluation of isatin derivatives as corrosion inhibitors for Q235A steel in highly concentrated HCl | |
| CN111718698A (en) | Hyperbranched polyetheramine environment-friendly shale inhibitor, preparation method thereof and water-based drilling fluid | |
| CN109336851B (en) | four-Schiff base acidizing corrosion inhibitor and preparation method and application thereof | |
| CN112979492B (en) | Poly-Mannich base and preparation method and application thereof | |
| CN112592705B (en) | Ecological safety type scale and corrosion inhibitor and preparation method thereof | |
| CN108251087B (en) | Carbon dioxide flooding injection well annulus protection fluid and preparation method and use method thereof | |
| CN107418547B (en) | High-temperature acidizing corrosion inhibitor based on tribenzyl- (2-benzyl) pyridinium ammonium chloride | |
| US4460482A (en) | Composition and method for corrosion inhibition | |
| CN111020596B (en) | Water-soluble corrosion inhibitor for gas well and preparation method thereof | |
| Bobir et al. | SYNTHESIS AND PROPERTIES OF NITROGEN-RETAINING CORROSION INHIBITORS | |
| Zhao et al. | Evaluation of TG202 inhibitor for tubing steels in 15% hydrochloric acid by electrochemical noise technology | |
| CN105238379B (en) | A kind of long-acting corrosion inhibiter of acidification of gas well and its preparation method and application method | |
| CN102559167A (en) | Novel preparation method of schiff base oil well acidification corrosion inhibitor and application of preparation method | |
| NL2026950B1 (en) | Poly-mannich base as well as preparation method and application thereof | |
| US4511001A (en) | Composition and method for corrosion inhibition | |
| CN111020597B (en) | Oil-soluble corrosion inhibitor for gas well oil pipe and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |