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Oil soluble composite corrosion inhibitor

A composite corrosion inhibitor, oil-soluble technology, applied in the field of petroleum refining, can solve the problems of affecting film formation and neutralization, not achieving the comprehensive effect of anti-corrosion of the tower top system, etc., and achieves low cost and neutralization ability. The effect of strong, enhanced adsorption capacity

Active Publication Date: 2017-09-22
南京万象新材料科技有限责任公司
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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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  • Oil soluble composite corrosion inhibitor

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Vegetable oleic acid and naphthenic acid are prepared respectively with tertiary alkyl primary amines to form carboxylic acid amine salts, and alkylbenzenesulfonic acid and petroleum sulfonic acid are respectively prepared with tertiary alkyl primary amines to form sulfonic acid amine salts. Add 70g each of amine salt and naphthenic acid amine salt into the three-necked flask, add 50g each of heavy alkylbenzenesulfonate amine salt and petroleum sulfonate amine salt, 90g each of morpholine and methylmorpholine, heavy aromatic solvent and dimethylformaldehyde Take 90g of methyl formamide, stir at room temperature and pressure for 30 minutes, and then filter to remove impurities to obtain composite corrosion inhibitor A.

Embodiment 2

[0037] Animal oleic acid, naphthenic acid and tertiary alkyl primary amine are prepared respectively to form carboxylic acid amine salt, nonylphenol sulfonic acid amine salt and petroleum sulfonic acid are respectively prepared from tertiary alkyl primary amine to form sulfonic acid amine salt. Add 70g each of amine salt and amine salt of naphthenic acid into a three-necked flask, add 50g each of nonylphenol sulfonic acid amine salt and petroleum sulfonic acid amine salt, 90g each of morpholine and ethyl morpholine, heavy aromatic solvent, two Methylformamide and propylene glycol each 60g, stirred at normal temperature and pressure for 30min, then filtered to remove impurities to obtain composite corrosion inhibitor B.

Embodiment 3

[0039] Vegetable oleic acid, animal oleic acid, naphthenic acid are prepared respectively with tertiary alkyl primary amines Carboxylic acid amine salt, heavy alkylbenzene sulfonic acid, petroleum sulfonic acid and nonylphenol sulfonic acid are prepared respectively with tertiary alkyl primary amines Sulfonic acid amine salt, first add 50g of vegetable oleic acid amine salt, 50g of animal oleic acid amine salt and 40g of naphthenic acid amine salt into the three-necked flask, then add 30g of heavy alkylbenzene sulfonic acid amine salt, nonylphenol sulfonic acid amine salt 30g, 40g of petroleum sulfonic acid amine salt, 100g of morpholine, 30g of methylmorpholine, 30g of ethyl morpholine, 100g of heavy aromatic solvent, 50g of dimethylformamide, 50g of propylene glycol, stirred at room temperature and pressure for 30min and then filtered Composite corrosion inhibitor C is obtained by removing impurities.

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Abstract

The invention relates to an oil soluble composite corrosion inhibitor, and belongs to the field of petroleum refining. The oil soluble composite corrosion inhibitor is composed of following components including 20-40 wt% of carboxylic acid amine salt, 5-20 wt% of sulfonic acid amine salt, 15-40 wt% of organic amine and 20-40 wt% of an organic solvent. The carboxylic acid amine salt is a mixture formed through combination of two or more of carboxylic acid amine salt prepared through vegetable oleic acid and tertiary alkyl primary amine, carboxylic acid amine salt prepared through animal oleic acid and tertiary alkyl primary amine and carboxylic acid amine salt prepared through naphthenic acid and tertiary alkyl primary amine according to any proportion. The sulfonic acid amine salt is a mixture formed through combination of sulfonic acid amine salt prepared through heavy alkylbenzene sulfonic acid and tertiary alkyl primary amine, sulfonic acid amine salt prepared through nonyl phenol sulfonic acid and tertiary alkyl primary amine and sulfonic acid amine salt prepared through mahogany acid and tertiary alkyl primary amine according to any proportion. The product is stable in performance, good in oil solubility, high in anti-corrosion capability and neutralization ability and good in film forming performance, and when a tower roof system is used, an organic amine neutralizer or ammonium hydroxide does not need to be additionally injected.

Description

technical field [0001] The invention relates to an oil-soluble composite corrosion inhibitor, which belongs to the field of petroleum refining. Background technique [0002] Atmospheric and vacuum, catalytic cracking, hydrogenation and coking units occupy a dominant position in the refinery unit. After the initial processing of the raw material oil, it enters the electric desalination process after heat exchange, water washing, demulsification and desalination, and regular and vacuum distillation to obtain light naphtha, gasoline , diesel 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 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/10
CPCC23F11/10
Inventor 黄准
Owner 南京万象新材料科技有限责任公司
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