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Hydrogenation corrosion inhibitor

A corrosion inhibitor, dripping technology, applied in the treatment of equipment corrosion/fouling inhibition, petroleum industry, hydrocarbon oil treatment, etc., can solve problems such as little effect, pipeline production process impact, etc., to reduce acid corrosion and overcome dew point corrosion , the effect of protective film stabilization

Inactive Publication Date: 2019-03-22
JIANGSU KECHUANG PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some corrosion inhibitors have been used in the hydrorefining and hydrocracking units of many refineries to prevent corrosion and scaling, but the effect is minimal, and even production problems caused by excessive alkali values, such as Scaling and clogged pipes will affect the subsequent production process, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A hydrogenation corrosion inhibitor, comprising the following components in mass fraction: 10% of water-soluble quaternary ammonium salt, 4% of polyisobutylene succinimide, 5% of monoethanolamine, 8% of imidazoline naphthenate, propynyl alcohol 3%, benzotriazole 6%, and the balance is water.

[0033] Stir water, water-soluble quaternary ammonium salt, and polyisobutylene succinimide evenly, and cool down to about 30°C; then add benzotriazole, stir to fully dissolve, and finally add imidazoline naphthenate and propynyl alcohol , monoethanolamine, and stir evenly.

Embodiment 2

[0035] A hydrogenation corrosion inhibitor, comprising the following components in mass fraction: 8% of water-soluble quaternary ammonium salt, 4% of polyisobutylene succinimide, 5% of monoethanolamine, 8% of imidazoline naphthenate, propynyl alcohol 3%, benzotriazole 6%, and the balance is water.

[0036] The preparation method is the same as in Example 1.

Embodiment 3

[0038] A hydrogenation corrosion inhibitor, comprising the following components in mass fraction: 12% of water-soluble quaternary ammonium salt, 4% of polyisobutylene succinimide, 5% of monoethanolamine, 8% of imidazoline naphthenate, propynyl alcohol 3%, benzotriazole 6%, and the balance is water.

[0039] The preparation method is the same as in Example 1.

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PUM

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Abstract

The invention discloses a hydrogenation corrosion inhibitor. The hydrogenation corrosion inhibitor is prepared from the following components by mass: 8-12 percent of water-soluble quaternary ammoniumsalt, 1-5 percent of dispersant, 2-5 percent of monoethanolamine, 4-10 percent of water-soluble imidazoline compound, 1-5 percent of alkynol compound, 4-15 percent of nitrogen-containing adsorption corrosion inhibitor, and the balance of water. The synergistic effect of all the components of the hydrogenation corrosion inhibitor disclosed by the invention can significantly reduce acidic corrosioninhibition, and simultaneously reduce the amount of the hydrogenation corrosion inhibitor. Moreover, the hydrogenation corrosion inhibitor does not contain metals that are harmful to a catalyst, a pHvalue is 9-11, and a mechanical impurity is less than or equal to 0.08 percent.

Description

technical field [0001] The invention relates to a hydrogenation corrosion inhibitor, in particular to a hydrogenation corrosion inhibitor for the hydrogenation refining and hydrocracking unit fractionation tower top pipeline of an oil refinery. Background technique [0002] In recent years, with the gradual improvement of the country's refined oil standards, various refineries generally use hydrotreating to improve the quality of oil products in order to make the gasoline, kerosene and diesel produced meet the national environmental protection standards. However, the currently processed crude oil is gradually developing towards high sulfur and high acidity, causing serious corrosion and fouling in the high-pressure air cooler of the hydrogenation unit and downstream pipelines, seriously disturbing production safety and oil quality. [0003] Some corrosion inhibitors have been used in the hydrorefining and hydrocracking units of many refineries to prevent corrosion and scalin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G75/02
CPCC10G75/02
Inventor 顾齐欣孙建宜吴伟卫
Owner JIANGSU KECHUANG PETROCHEM
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