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Water soluble corrosion inhibitor for hydrogenation device and preparation method and application thereof

A hydrogenation unit and water-soluble technology, applied in the field of water-soluble corrosion inhibitor for hydrogenation unit and its preparation, can solve the problems of narrow temperature and pH range, metal content, poor corrosion resistance and the like

Inactive Publication Date: 2020-10-20
广东粤首新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a water-soluble corrosion inhibitor for a hydrogenation unit and its preparation method and application, so as to solve the problems of poor corrosion resistance, metal content, narrow application range of temperature and pH in the above-mentioned background technology

Method used

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  • Water soluble corrosion inhibitor for hydrogenation device and preparation method and application thereof
  • Water soluble corrosion inhibitor for hydrogenation device and preparation method and application thereof
  • Water soluble corrosion inhibitor for hydrogenation device and preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing a water-soluble corrosion inhibitor for a hydrogenation unit, comprising the following steps: in parts by volume;

[0036] S1. Preparation of materials: 20 parts of palmitic acid, 40 parts of polyethylene glycol compounds, 30 parts of cyanate compounds, and 20 parts of ethylenediamine are dissolved in an organic solvent, and 5 parts of catalyst are added to prepare a mixed raw material;

[0037] S2. Stirring: the mixed raw materials in S1 are continuously stirred for 5 hours in a mixing tank to make a preliminary mixed material;

[0038] S3. Feeding: add 30% water-soluble imidazoline to the preliminary mixture in S2, and use a stirring tank to continuously stir for 0.5 to 2 hours to prepare a semi-finished mixture;

[0039] S4. Oscillation: Use a vibrator to vibrate the semi-finished mixture in S3 at high frequency for 1 to 2 hours to discharge the air bubbles in the mixture;

[0040] S5. Secondary feeding: Add 30 parts of petroleum ether to the ...

Embodiment 2

[0053] A method for preparing a water-soluble corrosion inhibitor for a hydrogenation unit, comprising the following steps: in parts by volume;

[0054] S1. Preparation of materials: 20 parts of palmitic acid, 40 parts of polyethylene glycol compounds, 40 parts of cyanate compounds, and 20 parts of ethylenediamine are dissolved in an organic solvent, and 5 parts of catalyst are added to prepare a mixed raw material;

[0055] S2. Stirring: the mixed raw materials in S1 are continuously stirred for 5 hours in a mixing tank to make a preliminary mixed material;

[0056]S3. Feeding: add 30% water-soluble imidazoline to the preliminary mixture in S2, and use a stirring tank to continuously stir for 0.5 to 2 hours to prepare a semi-finished mixture;

[0057] S4. Oscillation: Use a vibrator to vibrate the semi-finished mixture in S3 at high frequency for 1 to 2 hours to discharge the air bubbles in the mixture;

[0058] S5. Secondary feeding: Add 30 parts of petroleum ether to the s...

Embodiment 3

[0071] A method for preparing a water-soluble corrosion inhibitor for a hydrogenation unit, comprising the following steps: in parts by volume;

[0072] S1. Preparation of materials: 20 parts of palmitic acid, 40 parts of polyethylene glycol compounds, 50 parts of cyanate compounds, and 20 parts of ethylenediamine are dissolved in an organic solvent, and 5 parts of catalyst are added to prepare a mixed raw material;

[0073] S2. Stirring: the mixed raw materials in S1 are continuously stirred for 5 hours in a mixing tank to make a preliminary mixed material;

[0074] S3. Feeding: add 30% water-soluble imidazoline to the preliminary mixture in S2, and use a stirring tank to continuously stir for 0.5 to 2 hours to prepare a semi-finished mixture;

[0075] S4. Oscillation: Use a vibrator to vibrate the semi-finished mixture in S3 at high frequency for 1 to 2 hours to discharge the air bubbles in the mixture;

[0076] S5. Secondary feeding: Add 30 parts of petroleum ether to the ...

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Abstract

The invention relates to the technical field of corrosion resistance of hydrogenation devices, in particular to a water soluble corrosion inhibitor for a hydrogenation device and a preparation methodand application thereof. The preparation method comprises the following steps of: S1, material preparation: dissolving 10-20 parts of palmitic acid, 10-40 parts of a polyethylene glycol compound, 10-50 parts of a cyanate ester compound and 10-20 parts of ethylenediamine in an organic solvent and adding 1-5 parts of a catalyst to prepare a mixed raw material; S2, stirring: stirring the mixed raw material in S1 continuously by using a stirring tank for 3-6 hours to prepare a preliminary mixed material; and S3, feeding the material. The water soluble corrosion inhibitor is a film-forming corrosion inhibitor and is particularly suitable for a low-temperature tower top system with catalyzing, hydrogenating and distilling devices. The corrosion inhibitor is injected from a volatilization line onthe top of a fractionating tower to form a compact protecting film on passing pipelines and equipment along with a pipeline medium flow to isolate corrosion of corrosion media to the equipment and pipelines, so that the corrosion rate is reduced and the operating period is prolonged.

Description

technical field [0001] The invention relates to the field of anti-corrosion technology for hydrogenation units, in particular to a water-soluble corrosion inhibitor for hydrogenation units and its preparation method and application. Background technique [0002] In the process of oil and gas extraction, impurity elements such as N, S, and Cl in the feed of the hydrogenation device for oil and gas extraction react under the action of hydrogenation to form corrosive media such as H2S, NH3, and HCl, and part of the corrosive media is carried along with the oil and gas. When the amount of condensed water in the initial setting area is small and the acid concentration is high at the top of the fractionation tower, it will cause serious corrosion to the equipment, and the ammonia salt generated will block the pipeline of the equipment and form corrosion under scale. [0003] Chinese Patent No. CN201110336680.0 discloses a water-soluble corrosion inhibitor consisting of benzotriazo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/14C23F11/12
CPCC23F11/122C23F11/126C23F11/141C23F11/146
Inventor 付海明叶显孟傅小川李兆军
Owner 广东粤首新科技有限公司
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