Corrosion inhibitor used for reforming device, and preparation method thereof

A reformer and corrosion inhibitor technology, which is applied in the fields of treatment equipment corrosion/fouling inhibition, petroleum industry, and hydrocarbon oil treatment, etc. Corrosion inhibition effect, slowing effect

Active Publication Date: 2017-11-10
徐文忠 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing reforming unit corrosion inhibitors are quaternary ammonium salts and organic polymers. This type of corrosion inhibitor has poor corrosion inhibition effect, because of its poor corrosion inhibition effect in the case of hi

Method used

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  • Corrosion inhibitor used for reforming device, and preparation method thereof
  • Corrosion inhibitor used for reforming device, and preparation method thereof
  • Corrosion inhibitor used for reforming device, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] The corrosion inhibitor for reforming unit of the present invention includes an amine compounding agent, and the amine compounding agent is composed of 40% by weight of monoethanolamine, 40% by weight of diethanolamine and 20% by weight of triethanolamine.

[0022] The preparation method of corrosion inhibitor for reforming unit of the present invention comprises the following steps:

[0023] Take ethylene oxide and ammonia, the ratio of the amount of ethylene oxide to ammonia is 1:4, the reaction needs to be carried out under pressure, the operating pressure is 15Mpa, the temperature is 130°C, react for 2 hours, and then gradually Cool to room temperature to obtain the product amine complex agent, wherein monoethanolamine, diethanolamine and triethanolamine are respectively 40%, 40% and 20%.

Embodiment 2

[0025] The corrosion inhibitor for reforming unit of the present invention includes an amine compounding agent, and the amine compounding agent is composed of 50% by weight of monoethanolamine, 35% by weight of diethanolamine and 15% by weight of triethanolamine.

[0026] The preparation method of corrosion inhibitor for reforming unit of the present invention comprises the following steps: get oxirane and ammonia, ammonia is dissolved in water, the concentration in water is controlled at 50%, the amount of substance of oxirane and ammonia The ratio is 1:5, and the reaction needs to be carried out under pressure. Usually, the operating pressure is 16Mpa, the temperature is 150°C, the reaction is for 2 hours, and then gradually cooled to room temperature to obtain the amine complex agent, in which monoethanolamine 30%, di Ethanolamine 35%, triethanolamine 15%.

Embodiment 3

[0028] The corrosion inhibitor for reforming unit of the present invention includes an amine compounding agent and a synergist, and the weight ratio of the synergist to the amine complexing agent is 1:1;

[0029] The amine compounding agent is composed of 40% by weight of monoethanolamine, 45% by weight of diethanolamine and 15% by weight of triethanolamine;

[0030] The synergist includes glycerol and citric acid, and the weight ratio of glycerol and citric acid is 1:1.

[0031] The preparation method of corrosion inhibitor for reforming unit of the present invention comprises the following steps:

[0032] (1) Take ethylene oxide and ammonia, the ratio of the amount of ethylene oxide to ammonia is 1:4~5, the reaction needs to be carried out under pressure, usually the operating pressure is 15Mpa, the temperature is 150°C, the reaction 2 hours, then gradually cooled to room temperature to obtain an amine complex agent, wherein monoethanolamine was determined to be 40%, dietha...

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Abstract

The invention relates to a corrosion inhibitor used for a reforming device, and a preparation method thereof. The corrosion inhibitor used for the reforming device comprises an amine complexing agent, and the amine complexing agent comprises, by weight, 40-55% of monoethanolamine, 30-45% of diethanolamine and 10-20% of triethanolamine. The corrosion inhibitor is an oil-soluble film forming substance, contains polar groups, and can be adsorbed on the surface of the reforming device to form a single-molecular waterproof protection film, and the single-molecular waterproof protection film has a strong repulsion effect on hydrogen ions and prevents the hydrogen ions from approaching a metal device, so the effects of HCl and H2S are alleviated.

Description

technical field [0001] The invention belongs to the field of corrosion inhibitors, and in particular relates to a corrosion inhibitor for a reforming unit and a preparation method thereof. Background technique [0002] At present, the quality of crude oil is declining, the content of bituminous colloid in crude oil is constantly increasing, and the corrosion of refinery equipment is becoming more and more serious. Most of the existing reforming unit corrosion inhibitors are quaternary ammonium salts and organic polymers. This type of corrosion inhibitor has poor corrosion inhibition effect, because of its poor corrosion inhibition effect in the case of high colloid content. Moreover, such corrosion inhibitors will affect the activity of the catalyst to a certain extent during use, thereby affecting the production efficiency of the enterprise and increasing the production cost of the enterprise. Contents of the invention [0003] In order to solve the problems existing in ...

Claims

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Application Information

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IPC IPC(8): C10G75/02
Inventor 徐文忠
Owner 徐文忠
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