Preparation method and application of dibenzylamine quaternary ammonium salt high-temperature-resistant acidizing corrosion inhibitor

一种酸化缓蚀剂、二苄胺的技术，应用在缓蚀剂材料领域，能够解决制备复杂、反应温度高等问题，达到制备方法简单、提高分散性、抑制腐蚀的效果

Active Publication Date: 2019-03-01
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its preparation is more complicated, and the reaction temperature is as high as more than 200 degrees

Method used

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  • Preparation method and application of dibenzylamine quaternary ammonium salt high-temperature-resistant acidizing corrosion inhibitor
  • Preparation method and application of dibenzylamine quaternary ammonium salt high-temperature-resistant acidizing corrosion inhibitor
  • Preparation method and application of dibenzylamine quaternary ammonium salt high-temperature-resistant acidizing corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of dibenzylamine quaternary ammonium salt high temperature acidification corrosion inhibitor, comprising the following steps:

[0025] (1) 8.71g of morpholine was added to a 250mL three-necked flask, while 80mL of absolute ethanol was added as a solvent and stirred evenly;

[0026] (2) Weigh 9.25g of epichlorohydrin, dissolve it in 30mL of absolute ethanol and stir evenly, slowly add dropwise into the morpholine solution, stir and react at room temperature for 14h, and obtain intermediate I after vacuum distillation;

[0027] (3) Weigh 1.79g of intermediate I and add it to a 250mL three-necked flask, add 90mL of absolute ethanol as a solvent and stir evenly, weigh 1.97g of dibenzylamine and dissolve it in 30mL of absolute ethanol and stir evenly, slowly drop Add 1.4g of potassium carbonate to the intermediate I solution, then raise the temperature to 80°C for reflux reaction for 14 hours, cool to room temperature after the reaction, filter, extract,...

Embodiment 2

[0032] A preparation method of dibenzylamine quaternary ammonium salt high temperature acidification corrosion inhibitor, comprising the following steps:

[0033] (1) 5.59g of indole was added to a 250mL three-necked flask, while 70mL of acetone was added as a solvent and stirred evenly;

[0034] (2) Weigh 4.62g of epichlorohydrin, dissolve it in 30mL of acetone and stir evenly, slowly add it dropwise to the above-mentioned indole solution, stir and react at room temperature for 12h, and obtain intermediate I after vacuum distillation;

[0035] (3) Weigh 2.11g of intermediate I and add it to a 250mL three-necked flask. At the same time, add 90mL of acetonitrile as a solvent and stir evenly. Weigh 1.97g of dibenzylamine and dissolve it in 30mL of acetonitrile and stir evenly. Slowly add it dropwise to intermediate I solution, and added 1.2g of triethylamine, and then heated to 57 ° C reflux reaction for 15h, after the reaction was cooled to room temperature, filtered, extracted...

Embodiment 3

[0040] A preparation method of dibenzylamine quaternary ammonium salt high temperature acidification corrosion inhibitor, comprising the following steps:

[0041] (1) 10.82g of benzylamine was added into a 250mL three-necked flask, while 100mL of absolute ethanol was added as a solvent and stirred evenly;

[0042] (2) Weigh 9.25g of epichlorohydrin, dissolve it in 30mL of absolute ethanol and stir evenly, slowly add it dropwise to the above-mentioned benzylamine solution, stir and react at room temperature for 12h, and obtain intermediate I after vacuum distillation;

[0043] (3) Weigh 2.07g of intermediate I and add it to a 250mL three-neck flask, add 90mL of acetone as a solvent and stir evenly, weigh 1.97g of dibenzylamine and dissolve it in 30mL of acetone, stir evenly, and slowly add it dropwise to intermediate I solution, and added 0.7g of sodium hydroxide, and then heated to 60 ° C reflux reaction for 13h, after the reaction was cooled to room temperature, filtered, ext...

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Abstract

The invention discloses a preparation method and application of a dibenzylamine quaternary ammonium salt high-temperature-resistant acidizing corrosion inhibitor. The preparation is as follows: (1) anamine reactant, such as benzene methanamine, phenylethylamine, morpholine or indole, is dissolved in an organic solvent, epoxy chloropropane is slowly dropwise added, a stirring reaction is performedfor 12 to 14 h at the normal temperature, and then reduced pressure distillation and washing are carried out to obtain an intermediate I; (2) the intermediate I is dissolved in the organic solvent, dibenzylamine is added into the organic solvent, then an acid-binding agent is added, heating is carried out to a temperature of 60 to 80 DEG C to perform a reaction for 14 to 16 h, and after cooling is carried out to the room temperature, filtering, extraction and reduced pressure distillation are carried out to prepare an intermediate II; (3) the intermediate II is dissolved in the organic solvent, a quaternization reagent is added into the organic solvent, heating is carried out to a temperature of 80 to 110 DEG C to perform a reaction for 12 to 15 h, cooling is carried out to the room temperature, and filtering, extraction and reduced pressure distillation are carried out to prepare the dibenzylamine quaternary ammonium salt high-temperature-resistant acidizing corrosion inhibitor. Thepreparation method is simple and feasible and is reliable in principle; and the prepared acidizing corrosion inhibitor has an obvious inhibition effect on acid corrosion of oil-gas well carbon steel.

Description

technical field [0001] The invention relates to a preparation method and application of a dibenzylamine quaternary ammonium salt high-temperature acidification corrosion inhibitor in the field of corrosion inhibitor materials. Background technique [0002] In the process of oil and gas field stimulation and transformation, fracturing and acidification has become the mainstream way of oil and gas field stimulation and transformation. In the process of acid fracturing and pickling, acid liquid can largely unblock oil and gas wellbore, improve matrix permeability, and thus enhance oil and gas recovery. However, the existence of acid liquid will also bring many problems to the oil field. During the acidizing construction process, the injection of acid liquid will cause corrosion of oil and gas well pipes and downhole metal equipment. In severe cases, it may lead to sudden rupture of downhole pipes. It is a potential safety hazard, and the metal iron ions dissolved by the acid s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/14
CPCC23F11/143C07C213/08C09K8/54C09K2208/32C23F11/04C23F11/141C07C215/40C07C209/84E21B41/02
Inventor 李勇明王鼎立江有适陈曦宇朱炬辉
Owner SOUTHWEST PETROLEUM UNIV
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