Preparation method of oil soluble hydrogenation corrosion inhibitor for hydrogenation and reforming device

Abstract

The invention relates to a preparation method of oil soluble hydrogenation corrosion inhibitor for a hydrogenation and reforming device; the oil soluble hydrogenation corrosion inhibitor is prepared by the following ingredients by weight percentage: 5-20 percent of organic amine, 0-20 percent of imidazoline derivative, 10-60 percent of fatty acid amino amide and 30-60 percent of heavy aromatics; the organic amine is gamma-methoxypropylamine, dodecyl primary amine, dodecyldimethyltertiaryamine or diethylenetriamine, preference for gamma-methoxypropylamine or dodecyldimethyltertiaryamine; the oil soluble hydrogenation corrosion inhibitor is formed by mixing all ingredients, the preparation is simple, the performance of a product is stable, and has high efficiency and no toxicity, little corrosion inhibitor is only filled to effectively inhibit corrosion and salt crust generation, the filling process is simple without changing the equipment pipelines; the filling of the corrosion inhibitor has no adverse effect on performance of oil products and the follow-up processing, and the corrosion inhibitor has no interference to the activity of catalyzers and has strong application to the environment.

Description

technical field [0001] The invention relates to a preparation method of an oil-soluble hydrogenation corrosion inhibitor used in hydrogenation and reforming units. Background technique [0002] Petroleum hydrogenation technology is an important means of refining, upgrading and heavy oil processing of petroleum products. It plays a very important role in improving the processing depth of crude oil and ensuring and improving product quality. In recent years, due to the shortage of domestic oil resources, a large amount of high-sulfur crude oil has been imported, and the role of hydrogenation units in the processing of high-sulfur crude oil is extremely important. As the sulfur content of crude oil increases, the corrosion of the hydrogenation unit is intensified. At the same time, because the hydrogenation unit is operated at high temperature, high pressure, and near hydrogen, the logistics are flammable and explosive. Once corrosion failure occurs, it will lead to serious acc...

AI Technical Summary

Problems solved by technology

Although water-soluble corrosion inhibitors have a certain effect on equipment anti-corrosion, they must be used in conjunction with amine injection in industrial applications, and the pH value must be controlled within the range of 7-9, and the corrosion inhibitor performance is poor in the low pH HCl dew point area

Judging from the current market usage, it is difficult for water-soluble corrosion inhibitors to play an anti-corrosion effect on the initial condensation area of ​​oil refining, the inner wall of the distillation tower, the internal components of the tower and the transmission pipeline.

Corrosion inhibitors based on imidazoline and its derivatives have poor film-forming performance, low slow-release rate, and are easy to emulsify, which makes it unsuitable for treatment and discharge in the later stage of water cutting of the device.

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