Hydrogenation device oil-soluble corrosion inhibitor and preparation method and application thereof

Abstract

The invention relates to the technical field of oil-soluble corrosion inhibitors, in particular to a hydrogenation device oil-soluble corrosion inhibitor which is characterized by comprising the following components in parts by weight: 78-80 parts of pure ethanol, 10-20 parts of isopropanol, 10-20 parts of an active agent, 10-20 parts of an organic corrosion inhibitor, 10-20 parts of water, 1-3 parts of ethylenediamine and 1-3 parts of a neutralizer. 10 to 15 parts of isopropanol; 10 to 15 parts of an active agent; 10 to 15 parts of an organic corrosion inhibitor; 60 to 70 parts of water; 31 to 45 parts of ethylenediamine; and 1-5 parts of a neutralizer. The corrosion inhibitor has the beneficial effects that the oil-soluble corrosion inhibitor is finally prepared from pure ethanol, isopropanol, an active agent, organic corrosion inhibitor water, ethylenediamine and a neutralizer. The corrosion inhibitor has the advantages of favorable corrosion inhibition effect, favorable film-forming property, high hydrogen sulfide corrosion resistance, no oil emulsification, no oil precipitation and no adverse influence on the oil quality, and the adopted neutralizer is polyethylene polyamine,and can perform a neutralization action with an acidic neutralizing medium.

Description

technical field [0001] The invention relates to the technical field of oil-soluble corrosion inhibitors, in particular to an oil-soluble corrosion inhibitor for a hydrogenation unit and its preparation method and application. Background technique [0002] Crude oil becomes heavier and thicker and the demand for light oil products continues to increase. Heavy oil processing has become the main problem faced by modern refineries. Currently, heavy oil processing mainly includes delayed coking, viscracking, catalytic cracking and heavy oil hydrogenation. , the hydrogenation process is a deep processing technology for heavy oil. Under the action of hydrogen and catalysts, desulfurization, denitrification, and metallization are carried out on atmospheric or vacuum residual oil to obtain light products to the maximum extent. Through combined hydrogenation and upgrading Technology can further optimize product quality and improve product quality. With the improvement of domestic envi...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an oil-soluble corrosion inhibitor for a hydrogenation unit and its preparation method and application, so as to solve the problem of poor corrosion inhibition effect in the above-mentioned background technology, which easily emulsifies the oil product and affects the quality of the oil product , and the product stability is poor, and at the same time, it is impossible to improve the dew point corrosion in the condensation process of the condensation cooling system at the top of the hydrogenation tower

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