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Triazole modified mannich base compound and preparation method thereof

A technology of Mannich base and triazole, which is applied in the field of triazole-modified Mannich base compound and its preparation, and oilfield chemicals, can solve the problems of poor corrosion inhibition effect and poor alkali resistance, and achieve alkali resistance Improved performance, improved alkali resistance, and strong acid solubility

Active Publication Date: 2016-07-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the research on corrosion inhibitors at home and abroad mainly focuses on several types of corrosion inhibitors such as Mannich bases, imidazolines and quaternary ammonium salts. They all have their own advantages and disadvantages. For example, Mannich base corrosion inhibitors have strong acid solubility, It has the advantages of good temperature and acid resistance, but there are disadvantages such as poor corrosion inhibition effect and poor alkali resistance.

Method used

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  • Triazole modified mannich base compound and preparation method thereof
  • Triazole modified mannich base compound and preparation method thereof
  • Triazole modified mannich base compound and preparation method thereof

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preparation example Construction

[0033] See Image 6 with Figure 7 , The preparation method of the triazole-modified Mannich base compound of the present invention includes Mannich reaction, preparation of sulfonium ylide, epoxidation and ring opening reaction, and the specific steps are as follows:

[0034] (1): Mix the formaldehyde solution with organic amine (one of diethylamine, diethanolamine, aniline) and add it to the solvent (ethanol or deionized water), and then adjust the pH to 3-6 with hydrochloric acid solution. Under stirring, the temperature is raised to 30~50℃, the reaction is 0.5h~1h, the temperature is continued to 60~90℃, ketone (one of acetone, methyl ethyl ketone, acetophenone) is added dropwise, and the reaction is kept for 5~8h; The solvent was distilled off under reduced pressure, and then washed with ether for 2 to 3 times. After drying, Mannich base was obtained; the mass fraction of the formaldehyde solution was 20%-50%, and the amount of formaldehyde, amines, and ketones in the formald...

Embodiment 1

[0039] The preparation of the triazole modified Mannich base compound includes the following steps:

[0040] (1) Mix 20% formaldehyde solution with diethanolamine and add it to ethanol, then use 15% hydrochloric acid to adjust pH=3.5, stir and raise the temperature to 30°C, react for 1 hour, and continue to heat up to 60°C , Acetone was added dropwise, and the reaction was kept for 8h; the solvent ethanol was removed by vacuum distillation, and then washed with ether for 2 to 3 times, and Mannich base was obtained after drying; among them, the ratio of formaldehyde, diethanolamine, and acetone in the formaldehyde solution It is 1.5:1:1, and the volume ratio of ethanol to formaldehyde solution is 25:1.

[0041] (2) Add CH to a 500mL three-necked flask equipped with an electric stirrer, a constant pressure funnel and a condenser 3 I and THF, add CH dropwise at room temperature 3 SCH 3 , And fully stirred for 8h; then add sodium methoxide and stir for deprotonation reaction for 0.2h, ...

Embodiment 2

[0044] The preparation of the triazole modified Mannich base compound includes the following steps:

[0045] (1) Mix the 30% formaldehyde solution with diethanolamine and add it to the solvent ethanol, then adjust the pH to 5 with 25% hydrochloric acid, stir and raise the temperature to 40°C, react for 0.6h, continue to heat up At 70℃, add the acid component acetone dropwise, keep the temperature for 5.5h; distill under reduced pressure to remove the solvent, then wash with ether for 2 to 3 times, and dry to obtain Mannich base; among them, formaldehyde, diethanolamine and acetone in the formaldehyde solution The ratio of the amount of substances is 3:1.5:1, and the volume ratio of ethanol to formaldehyde solution is 30:1.

[0046] (2) Add CH to a 500mL three-necked flask equipped with an electric stirrer, a constant pressure funnel and a condenser 3 I and solvent THF, add CH dropwise at room temperature 3 SCH 3 , And fully stirred for 12h; then add sodium ethoxide and stir for dep...

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Abstract

The invention discloses a triazole modified mannich base compound and a preparation method thereof.CH3I and THF are added into a reactor, CH3SCH3 is added dropwise, and stirring is performed for 8-12 h; then, a deprotonation reaction is performed for 0.2-1.5 h, then, mannich base is added dropwise at the temperature of 15-35 DEG C, a heat preservation reaction is performed after the mannich base is added dropwise, and a mannich base epoxy compound is obtained; triazole and DMF are added into a reaction kettle, the mannich base epoxy compound is added into the reaction kettle dropwise, the base is added, a thermostatic reaction is performed, and a heterocyclic compound modified mannich base compound is obtained.A triazole modified mannich base corrosion inhibitor is obtained through an epoxidation reaction and etheric ring-opening reaction.According to the mannich base, N and O atoms are used as corrosion inhibitor molecules of an active center, complexing can be performed on lone pair electrons and metal ions in a coordinate bond mode to form a polymer, and the lone pair electrons can be combined with the metal ions so as to cover the surface of equipment in an adsorption membrane to achieve the corrosion inhibiting action.

Description

Technical field [0001] The invention belongs to the field of fine chemicals and relates to a class of oilfield chemicals, in particular to a triazole modified Mannich base compound and a preparation method thereof. Background technique [0002] In the oil and gas field gathering pipelines and oil refining process, the equipment will be corroded to different degrees. This kind of corrosion is most common with acid corrosion; especially with the development of oil drilling technology and the progress of oil production technology, a large number of deep wells and ultra-deep wells The investment and development of He very deep well puts forward higher requirements for the strength and protection of equipment; at the same time, acidification is a commonly used means to improve oil recovery. In this process, preventing acid corrosion of equipment is an indispensable link, and the use of corrosion inhibitors It is the most practical and easiest method. [0003] The role of corrosion inhi...

Claims

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Application Information

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IPC IPC(8): C07D249/08C23F11/14
CPCC07D249/08C23F11/149
Inventor 郭睿甄建斌李欢乐王超李晓芳刘爱玉杨江月程敏
Owner SHAANXI UNIV OF SCI & TECH
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