Method for inhibiting corrosion in the crude distillation process

MX431080BActive Publication Date: 2026-02-25UNIV POLITECNICA DE QUINTANA ROO
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Patent Information

Application Number
MX2019004701
Authority / Receiving Office
MX · MX
Patent Type
Patents
Current Assignee / Owner
Filing Date
2019-04-05
Publication Date
2026-02-25
Estimated Expiration
2039-04-05

AI Technical Summary

Technical Problem

Existing methods for preventing corrosion in crude oil refining processes, particularly due to organic chlorides, often result in the formation of ammonium salts that cause fouling and corrosion, and conventional nitrogenous compounds exacerbate the issue by promoting their precipitation.

Method used

Application of a composition comprising neodymium and praseodymium salts, free of nitrogen, which form a protective layer on metal surfaces to inhibit corrosion, using a mixture of these salts in specific concentrations and applying them at key points in the refining process to neutralize pH and prevent ammonium chloride formation.

Benefits of technology

The method achieves over 90% corrosion inhibition efficiency by forming a protective oxide layer on metal surfaces, reducing fouling and extending equipment life without introducing nitrogenous compounds that contribute to ammonium salt precipitation.

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Abstract

The present invention relates to a method of protection against corrosion in refining process units of crude oil contaminated with organic chlorides through the application of anticorrosive compounds, based on rare earth salts. Said salts include neodymium and praseodymium salts, used as additives, with the distinctive element of being nitrogen-free and suitable for service at high temperatures, designed to extend the useful life of facilities and processes associated with oil refining and the petrochemical industry.
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