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Neutral corrosion inhibitor

A corrosion inhibitor and corrosion inhibitor technology, applied in the field of neutralizing corrosion inhibitor, can solve the problems of corrosion, secondary corrosion, scaling, etc., and achieve the effects of good water solubility, corrosion inhibition, and dosage reduction

Inactive Publication Date: 2012-10-17
WUHAN RUNERHUA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a neutralizing corrosion inhibitor which solves the corrosion problem of the condensation cooling system at the top of the atmospheric and vacuum unit of an oil refinery. It can solve the scaling and secondary corrosion problems caused by dew point corrosion and ammonium salt deposition

Method used

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Embodiment 1

[0024] This embodiment discloses a neutralizing corrosion inhibitor, its composition and mass percentage are:

[0025] Dispersant 3%, neutral organic amine 25%, water-soluble imidazoline compound 8%, acetylenic alcohol compound 3%, nitrogen-containing adsorption corrosion inhibitor 6%, solvent 53%, passivation corrosion inhibitor 2%.

[0026] The dispersant is composed of polymaleic anhydride in an organic carboxylic acid polymer;

[0027] The neutral organic amine is composed of ethylenediamine in polyethylene polyamine;

[0028] The water-soluble imidazoline compound is composed of naphthenic acid imidazoline;

[0029] The acetylenic alcohol compound consists of propynyl alcohol in alcohols containing carbon triple bonds;

[0030] The nitrogen-containing adsorption type corrosion inhibitor is composed of benzotriazole;

[0031] The solvent consisted of tap water.

[0032] The passivation type corrosion inhibitor is composed of ammonium nitrate in nitrate.

[0033] The p...

Embodiment 2

[0039] This embodiment discloses a neutralizing corrosion inhibitor, its composition and mass percentage are:

[0040] 2% dispersant, 35% neutral organic amine, 8% water-soluble imidazoline compound, 3% acetylenic alcohol compound, 5% nitrogen-containing adsorption corrosion inhibitor, 45.5% solvent, and 1.5% passivation corrosion inhibitor.

[0041] The dispersant is composed of polyacrylic acid in an organic carboxylic acid polymer;

[0042] The neutral organic amine is composed of monoethanolamine and triethylenetetramine in polyethylene polyamine, wherein the mass content of monoethanolamine accounts for 20%, and the mass content of triethylenetetramine accounts for 15%;

[0043] The water-soluble imidazoline compound is composed of imidazoline oleate;

[0044] The alkynyl alcohol compound is composed of hydroxypropargyl ether in alcohol containing carbon triple bonds;

[0045] The nitrogen-containing adsorption type corrosion inhibitor is composed of urotropine;

[004...

Embodiment 3

[0052]This embodiment discloses a neutralizing corrosion inhibitor, its composition and mass percentage are:

[0053] 2.5% dispersant, 30% neutral organic amine, 6% water-soluble imidazoline compound, 3% acetylenic alcohol compound, 8% nitrogen-containing adsorption corrosion inhibitor, 48.5% solvent, and 2% passivation corrosion inhibitor.

[0054] The dispersant is composed of polymaleic anhydride in an organic carboxylic acid polymer;

[0055] The neutral organic amine is composed of diethylenetriamine in polyethylene polyamine;

[0056] The water-soluble imidazoline compound is composed of naphthenic acid imidazoline;

[0057] The acetylenic alcohol compound is composed of butynediol diethoxy ether in alcohol containing carbon triple bonds;

[0058] The nitrogen-containing adsorption type corrosion inhibitor is composed of benzothiazole;

[0059] The solvent consists of tap water;

[0060] The passivating corrosion inhibitor consists of ammonium borate in borate.

[0...

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Abstract

The invention belongs to the field of chemical additives and discloses a neutral corrosion inhibitor. The neutral corrosion inhibitor comprises the following components of: by weight, 1-5% of a dispersant, 15-40% of neutralizing organic amine, 4-10% of a water-soluble imidazoline compound, 1-5% of an alkynol compound, 4-15% of a nitrogen-containing adsorption type corrosion inhibitor, and 20-55% of a solvent. The neutral corrosion inhibitor provided by the invention has an effect of neutralizing acidic matters, and also has the efficacy of forming film on metal surface. By the adoption of the neutral corrosion inhibitor, the fouling and secondary corrosion problems caused by dew spot corrosion and ammonium salt deposition can be solved.

Description

technical field [0001] The invention belongs to the field of chemical additives, in particular to a kind of HCl-H used to control the condensation cooling system at the top of the atmospheric and vacuum device of the refinery 2 S-H 2 O system corrosion, avoiding scaling and secondary corrosion caused by ammonium salt deposition, and a neutralizing corrosion inhibitor with both neutralizing and anti-corrosion effects. Background technique [0002] With the continuous increase of high-acid and high-sulfur crude oil processing volume, the corrosion of refinery equipment is becoming more and more serious, which has affected the safety, stability, long-term, full-load, and high-quality production of refinery equipment. [0003] The sulfides and chlorides in crude oil decompose and hydrolyze to form H at high temperature 2 S and HCl, H 2 S and HCl often exist in the condensation cooling system at the top of the atmospheric and vacuum distillation tower in the refinery equipment...

Claims

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Application Information

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IPC IPC(8): C23F11/04
Inventor 吴宇锋朱琼徐文刚崔小刚
Owner WUHAN RUNERHUA TECH
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