Polyheterocyclic cyanuric chloride antioxidant corrosion inhibitor as well as preparation method and application thereof

An anti-oxidant corrosion inhibitor, cyanuric chloride technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of poor solubility, accelerated corrosion, high cost, and achieve good oxygen resistance. Corrosion effect, good corrosion inhibition performance, effect of delaying pipe corrosion

Inactive Publication Date: 2018-12-18
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nitrogen flooding technology adopted in the process of gas injection flooding in my country's oilfields, due to cost and construction reasons, the injected nitrogen often contains a certain amount of oxygen, and the injected formation water is mostly high-salinity formation water, and conventional corrosion inhibitors have poor solubility. , poor compatibility, slow adsorption and film formation in formation water
At present, there are few types of corrosion inhibitors for oxygen corrosion in neutral medium of gas injection wells. Although oxidized corrosion inhibitors can inhibit the corrosion of carbon steel in neutral medium, their dosage is high and the cost is high, especially when the dosage is lower than the critical concentration However, it will accelerate local pitting corrosion; although the pre

Method used

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  • Polyheterocyclic cyanuric chloride antioxidant corrosion inhibitor as well as preparation method and application thereof
  • Polyheterocyclic cyanuric chloride antioxidant corrosion inhibitor as well as preparation method and application thereof
  • Polyheterocyclic cyanuric chloride antioxidant corrosion inhibitor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of polyheterocyclic cyanuric chloride anti-oxidant corrosion inhibitor, comprises the following steps:

[0021] (1) Add 3.08g of cyanuric chloride to a 250mL three-necked flask, and simultaneously add 30mL of acetone as a solvent, and mix well;

[0022] (2) Dissolve 4g of pyridine in 50mL of acetone, and slowly add it dropwise to the result of step (1) at a rate of 15mL / min in an ice-water bath, continue the reaction for 2h after the dropwise addition, and then raise the temperature to 30°C Continue to react for 4 hours, then raise the temperature to 70°C for 8 hours under reflux, cool to room temperature and filter to obtain the precipitate, wash the precipitate with 50 mL of absolute ethanol for 3 times, and dry at 50°C for 6 hours to obtain a white solid product, namely polyheterocyclic trimeric chloride Cyanide antioxidant corrosion inhibitor.

[0023] The above reaction formula is as follows:

[0024]

[0025] The resulting product is dete...

Embodiment 2

[0028] A preparation method of polyheterocyclic cyanuric chloride anti-oxidant corrosion inhibitor, comprises the following steps:

[0029] (1) Add 3.08g of cyanuric chloride to a 250mL three-necked flask, and simultaneously add 30mL of ethyl acetate as a solvent, and mix well;

[0030] (2) Dissolve 6.5g of quinoline in 50mL of acetone, slowly add it dropwise to the resultant of step (1) at a rate of 15mL / min under ice-water bath conditions, continue to react for 2h after the dropwise addition, and then heat up to Continue the reaction at 45°C for 4h, then raise the temperature to 80°C for 8h under reflux, cool to room temperature and filter to obtain the precipitate, wash the precipitate with 50mL of absolute ethanol for 3 times, and dry at 50°C for 6h to obtain a white solid product, polyheterocyclic three Polycyanogen chloride anti-oxidant corrosion inhibitor.

[0031] The above reaction formula is as follows:

[0032]

Embodiment 3

[0034] A preparation method of polyheterocyclic cyanuric chloride anti-oxidant corrosion inhibitor, comprises the following steps:

[0035] (1) Add 3.08g of cyanuric chloride to a 250mL three-necked flask, and simultaneously add 30mL of ethyl acetate as a solvent, and mix well;

[0036] (2) Dissolve 4.4g of quinoline in 50mL of acetone, slowly add it dropwise to the resultant of step (1) at a speed of 17mL / min under ice-water bath conditions, continue to react for 3h after the dropwise addition, and then heat up to Continue to react at 30°C for 6h, then raise the temperature to 80°C for reflux reaction for 12h, cool to room temperature and filter to obtain a precipitate, wash the precipitate with 50mL of absolute ethanol three times, and dry at 50°C for 6h to obtain a white solid product, polyheterocyclic three Polycyanogen chloride anti-oxidant corrosion inhibitor.

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Abstract

The invention discloses a polyheterocyclic cyanuric chloride antioxidant corrosion inhibitor as well as a preparation method and application thereof. The preparation method of the antioxidant corrosion inhibitor comprises the following steps: dissolving cyanuric chloride in an organic solvent to obtain a solution A, adding an organic amine into the organic solvent to obtain a solution B, adding the solution B into the solution A at 0-5 DEG C, and stirring for carrying out a reaction for 2-3h; then, heating up to 30-45 DEG C, carrying out a reaction for 4-6h, then heating up to 70-80 DEG C andcarrying out a reaction for 8-12h; cooling to the room temperature, filtering, washing, and drying to obtain the antioxidant corrosion inhibitor. The corrosion inhibitor has good corrosion inhibitionproperty at the high temperature; when being used an antioxidant corrosion inhibitor for a gas-injection well, the polyheterocyclic cyanuric chloride antioxidant corrosion inhibitor has good dissolubility in highly mineralized formation brines, and has an obvious inhibiting effect on oxygen corrosion of carbon steel of the gas-injection well.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitor materials, in particular to a polyheterocyclic cyanuric chloride anti-oxidation corrosion inhibitor and its preparation method and application. Background technique [0002] Gas injection flooding is widely used in oilfield enhanced oil recovery. The nitrogen flooding technology adopted in the process of gas injection flooding in my country's oilfields, due to cost and construction reasons, the injected nitrogen often contains a certain amount of oxygen, and the injected formation water is mostly high-salinity formation water, and conventional corrosion inhibitors have poor solubility. , poor compatibility, slow adsorption and film formation in formation water. At present, there are few types of corrosion inhibitors for oxygen corrosion in neutral medium of gas injection wells. Although oxidized corrosion inhibitors can inhibit the corrosion of carbon steel in neutral medium, their dos...

Claims

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Application Information

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IPC IPC(8): C07D401/14C09K8/54C23F11/14
CPCC07D401/14C09K8/54C23F11/149
Inventor 毛金成王基臣张恒杨小江彭丹
Owner SOUTHWEST PETROLEUM UNIV
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