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Acidification corrosion inhibitor based on interpolymer indolizine derivative as well as preparation method and application thereof

A technology of acidification corrosion inhibitor and indolezine, which is applied in the field of acidification corrosion inhibitor and its preparation, can solve problems such as application limitations, and achieve the effects of small impact, environmental friendliness and low cost

Inactive Publication Date: 2018-08-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of related acidification corrosion inhibitors is also often affected by economic costs and environmental protection requirements, so that its application is limited

Method used

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  • Acidification corrosion inhibitor based on interpolymer indolizine derivative as well as preparation method and application thereof
  • Acidification corrosion inhibitor based on interpolymer indolizine derivative as well as preparation method and application thereof
  • Acidification corrosion inhibitor based on interpolymer indolizine derivative as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] a. Take pyridine and bromoacetic acid with a molar ratio of 1:1, use the same molar amount of water as a solvent, heat and reflux at 50°C and stir for 12 hours to obtain a light yellow liquid, which is a brominated carboxymethylpyridine quaternary Ammonium salt solution. The water in the above-mentioned quaternary ammonium salt solution was heated and evaporated to obtain light yellow-white carboxymethylpyridinium bromide quaternary ammonium salt solid.

[0042] b. Take pyridine and benzyl bromide with a molar ratio of 1:1 (the molar weight is the same as the first step in Example 1), and use equimolar water as a solvent to reflux and stir at 90-100 ° C for 8 hours to carry out quarterly The corresponding quaternary ammonium salt solution is obtained through the ammonization reaction, and the appearance is a dark yellow to reddish-brown transparent liquid. The solvent was evaporated under heating to finally obtain an orange-yellow benzylpyridinium bromide quaternary ammo...

Embodiment 2

[0046] a. Take quinoline and bromoacetic acid with a molar ratio of 1:1, and use the same molar amount of water as a solvent to reflux and stir at 50°C for 12 hours to obtain a light yellow liquid, which is carboxymethylquinoline bromide Quaternary ammonium salt solution. The solvent water in the above-mentioned quaternary ammonium salt solution was heated and evaporated to obtain light orange-yellow carboxymethylquinoline bromide quaternary ammonium salt solid.

[0047] b. Take quinoline and benzyl bromide with a molar ratio of 1:1 (the molar weight is the same as the first step in Example 2), and use equimolar water as a solvent to reflux and stir at 80-90 ° C for 6 hours. Quaternization reaction to obtain the corresponding quaternary ammonium salt solution, the appearance is orange-red transparent liquid. The solvent was evaporated under heating to give a light brown benzylquinoline quaternary ammonium bromide solid.

[0048] c. Mix the solids obtained in the two-step rea...

Embodiment 3

[0051] a. Take pyridine and chloroacetic acid with a molar ratio of 1:1, use the same molar amount of water as a solvent, heat and reflux at 50°C and stir for 12 hours to obtain a light yellow liquid, which is a quaternary carboxymethylpyridine chloride. Ammonium salt solution. The water in the above-mentioned quaternary ammonium salt solution was heated and evaporated to obtain light yellow-white carboxymethylpyridinium chloride quaternary ammonium salt solid.

[0052] b. Take pyridine and ethyl α-chloroacetate with a molar ratio of 1:1 (the molar weight is the same as the first step in Example 3), and use equimolar water as a solvent to reflux and stir at 90-100°C for 8 Hours of quaternization reaction to obtain the corresponding quaternary ammonium salt solution, the appearance is dark yellow to reddish-brown transparent liquid. The solvent was evaporated under heating to finally obtain an orange-yellow solid of ethyl acetate pyridinium chloride quaternary ammonium salt. ...

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Abstract

The invention discloses an acidification corrosion inhibitor based on an interpolymer indolizine derivative as well as a preparation method and application thereof. The acidification corrosion inhibitor contains the interpolymer indolizine derivative; the interpolymer indolizine derivative is prepared by carrying out decarboxylation on heterocyclic alkali including (substituted) quinoline, (substituted) pyridine and the like, and carboxymethyl heterocyclic alkali quaternary ammonium salt obtained by alpha-haloacetic acid, and then carrying out intermolecular addition polymerization reaction onquaternary ammonium salt of the heterocyclic alkali including the (substituted) quinoline, the (substituted) pyridine and the like. The acidification corrosion inhibitor disclosed by the invention has relatively good corrosion inhibition performance under the condition that common corrosion inhibition synergists including alkynol and the like do not need to be compounded; the use amount of the acidification corrosion inhibitor is less and the acidification corrosion inhibitor can reach, even be better than the requirements of an acidification corrosion inhibitor performance testing method andfirst-grade to third-grade standards in evaluation indexes SY / T 5405-1996 when being independently used.

Description

technical field [0001] The invention belongs to the field of corrosion inhibitors used in oilfield acidification construction, and in particular relates to an acidification corrosion inhibitor based on interpolymer indolezine derivatives, a preparation method and application thereof. Background technique [0002] Acidizing refers to a technology that injects a large amount of high-concentration acid liquid into the formation to restore or increase the permeability of the formation, and realize the increase of production of oil and gas wells and the increase of injection of water wells. In the acidizing construction, especially in the acidizing of concentrated hydrochloric acid or a large amount of soil acid (a mixture of hydrochloric acid and hydrofluoric acid prepared in a certain proportion) in high-temperature deep wells, the primary task is to solve the problem of corrosion of the oil well casing equipment by the acidizing fluid . In addition, the hydrogen gas produced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D471/14C09K8/54C09K8/74C23F11/14
CPCC07D471/14C09K8/54C09K8/74C23F11/149
Inventor 王业飞杨震王任卓战风涛陈五花丁名臣吕志凤韩成友
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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