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A kind of corrosion agent and gentle technology, applied in the field of neutralizing corrosion inhibitor, can solve the problems of equipment corrosion, explosion, affecting equipment, etc., and achieve the effect of eliminating corrosion
Inactive Publication Date: 2019-03-26
JIANGSU KECHUANG PETROCHEM
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Abstract
Description
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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 mor
Method used
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Examples
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Embodiment 1
[0035] A neutralizing corrosion inhibitor, comprising the following components in mass fraction: polyisobutylene succinimide 4%, ethylenediamine 20%, naphthenic acid imidazoline 8%, benzimidazole mercaptan 1%, propynyl alcohol 3%, benzotriazole 6%, phosphorothioate 4%, Mannich base 4%, and the balance is water.
[0036] Stir water, polyisobutylene succinimide, and ethylenediamine evenly, and cool down to about 30°C; then add benzotriazole, stir to make it fully dissolve, and finally add naphthenic acid imidazoline, benzimidazole thiol , propynyl alcohol, phosphorothioate, and Mannich base, and stirred for 1 hour to obtain the neutralized corrosion inhibitor.
Embodiment 2
[0038] A neutralizing corrosion inhibitor, comprising the following components in mass fraction: polyisobutylene succinimide 2%, ethylenediamine 20%, naphthenic acid imidazoline 8%, benzimidazole mercaptan 0.8%, propynyl alcohol 2%, benzotriazole 10%, phosphorothioate 3%, Mannich base 3%, and the balance is water.
[0039] The preparation method is the same as in Example 1.
Embodiment 3
[0041] A neutralizing corrosion inhibitor, comprising the following components in mass fraction: polyisobutylene succinimide 3%, ethylenediamine 22%, naphthenic acid imidazoline 8%, benzimidazole mercaptan 1%, propynyl alcohol 5%, benzotriazole 12%, phosphorothioate 4%, Mannich base 4%, and the balance is water.
[0042] The preparation method is the same as in Example 1.
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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...
Claims
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Application Information
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