Neutralizing corrosion inhibitor

Abstract

The invention discloses a neutralizing corrosion inhibitor. The neutralizing corrosion inhibitor is prepared from the following compositions in percentage by mass: 1-5% of a dispersing agent, 20-25% of neutralizing organic amine, 4-10% of imidazolinecompounds, 1-5% of alkynol compounds, 4-15% of a nitrogenous adsorption-type corrosion inhibitor, 2-10% of a synergistic agent, and the balance of a solvent. According to the neutralizing corrosion inhibitor, high adsorption is achieved on the metal surface to prevent metal from corroding the cathode and anode conjugate process, and thus the effectof corrosion inhibition is effectively enhanced; a continuous and dense protective film can be formed on the metal surface, and corrosion of a high concentration sulfide, chloride and cyanide is inhibited; a mannich base and phosphorothioate are adopted as the synergistic agent, good thermal stabilization and chemical stability are achieved on the two-phase of water and oil, high adsorption is achieved on the metal surface, high inhibiting effect is achieved on corrosion of hydrogen sulfide and carbon dioxide, and meanwhile, good inhibition is achieved on corrosion of hyperthermia naphthenicacid; and the dosage is greatly lowered while it is ensured that the corrosion inhibition rate is greater than 90%.

Description

technical field [0001] The invention relates to a neutralizing corrosion inhibitor, in particular to a kind of anticorrosion and corrosion inhibition of equipment suitable for light oil distillation systems such as atmospheric and vacuum units, catalytic cracking units, delayed coking units, hydrogenation units, and visbreaking units in the oil refining industry. neutralizing corrosion inhibitor. Background technique [0002] Impurities such as S, N, Cl compounds and organic acids in crude oil, or they are converted into corrosive media during processing; in high temperature parts: mainly S-H 2 S-thiol-naphthenic acid system; at low temperature: mainly H 2 S-H 2 O, H 2 S- [0003] HCl—H 2 O, H 2 S-HCN-H 2 O and H 2 S-H 2 system. [0004] In the process of petroleum processing, with the continuous increase of the processing volume of high-acid and high-sulfur crude oil, the corrosion of equipment in the petroleum processing industry is becoming more and more serious...

AI Technical Summary

Problems solved by technology

The problem of equipment corrosion will not only affect whether the equipment can run efficiently, low-consumption, stable, and full-load for a long period of time, but more importantly, it may lead to fire, explosion, or personal injury accidents caused by leakage of flammable, explosive, or toxic and harmful media. cause irreparable damage