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Water-soluble compound corrosion inhibitor

A technology of water-soluble compound and corrosion inhibitor, which is applied in the direction of corrosion prevention during distillation, can solve the problems of affecting film formation and neutralization, and cannot achieve the comprehensive effect of anti-corrosion of the tower top system, and achieves strong corrosion resistance , strong neutralization ability and stable performance

Active Publication Date: 2014-07-23
金浦新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will not only increase the injection port in the process flow, but also easily affect the film formation and neutralization effect due to the interaction between the corrosion inhibitor and the neutralizer, and the comprehensive effect of anti-corrosion of the tower top system cannot be achieved.

Method used

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  • Water-soluble compound corrosion inhibitor
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First add 140g of 3,5-lutidine quaternary ammonium salt into a three-necked flask, then add 100g of tolyltriazole, 180g of morpholine, and 180g of solvent (deionized water) in sequence, and stir at room temperature and pressure After 30 minutes, filter out impurities to obtain composite corrosion inhibitor A.

Embodiment 2

[0027] First add 120g of 2,3,5-lutidine quaternary ammonium salt into a three-necked flask, then add 80g of tolyltriazole, 180g of monoethanolamine, and 180g of solvent (propylene glycol) in sequence, and stir at room temperature and pressure After 30 minutes, filter out impurities to obtain composite corrosion inhibitor B.

Embodiment 3

[0029] First add 140g of 3,5-lutidine quaternary ammonium salt into the three-necked flask, then add 100g of 5-methylbenzotriazole, 160g of monoethanolamine, and 200g of solvent (deionized water: propylene glycol = 1:1), Stir at room temperature and pressure for 30 minutes, then filter to remove impurities to obtain composite corrosion inhibitor C.

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Abstract

The invention relates to a water-soluble compound corrosion inhibitor. The water-soluble compound corrosion inhibitor comprises 20-40wt% of pyridine derivatives, 5-20wt% of methyl benzotriazole, 15-40wt% of organic amine and 20-40% of solvent. The corrosion inhibitor product is stable in performance, good in water solubility, high in anticorrosion capacity, high in neutralizing capacity and good in film-forming property; when the corrosion inhibitor is applied to a tower top system, an extra neutralizer is not needed to be added again, and therefore, the corrosion inhibitor is especially applicable to the tower top system of a reduced pressure relief device in the petroleum industry and can be applied to tower top water injection of the reduced pressure relief device or the tower top water injection of other petroleum processing devices.

Description

technical field [0001] The invention relates to a water-soluble composite corrosion inhibitor. Background technique [0002] Atmospheric and vacuum units play a dominant role in oil refining units. After heat exchange, the raw oil enters the electric desalination process for water washing, demulsification and desalination, and regular and vacuum distillation to obtain light naphtha, gasoline, diesel oil and heavy oil. Crude oil is composed of more than 95% carbon and hydrogen compounds, and the remaining 5% is organic and inorganic heteroelement compounds composed of sulfur, chlorine, nitrogen and metal elements. Although the content of such compounds is small, it affects the quality of the entire refinery. Process and product quality. From the perspective of corrosion and anti-corrosion, some of these impurities contained in crude oil are themselves corrosive media, such as hydrogen sulfide, elemental sulfur, mercaptans, organic acids, etc., and some will be converted into...

Claims

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Application Information

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IPC IPC(8): C10G7/10C23F11/04
Inventor 王春柱葛圣才戴泽青
Owner 金浦新材料股份有限公司
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