Corrosion inhibitor for ethylene chemical engineering

Abstract

The invention discloses a corrosion inhibitor for ethylene chemical engineering. The corrosion inhibitor for ethylene chemical engineering is prepared by the following steps of: 1, burdening, specifically, 15%-20% of sodium silicate, 3%-7% of acrylic acid, 1%-6% of HEDP, 5%-10% of mercaptobenzothiazole, 16%-26% of benzotriazole, 10%-20% of oleic acid, 10%-16% of ethylenediamine, 11%-21% of diethylenetriamine, 12%-20% of imidazoline, 1%-6% of alkylamino alcohol, 1%-3% of quaternary ammonium salt and 2%-6% of acetylenic alcohol are prepared; and 2, mixing, specifically, dehydration condensationreaction of sodium silicate, HEDP, mercaptobenzothiazole, benzotriazole, imidazoline and oleic acid is carried out to form complex imidazoline, wherein under the vacuum dehydration condition of the dehydration condensation reaction, the temperature is 150 DEG C, and the reaction time is 5 h. The corrosion inhibitor prepared by the method has the imidazoline ring structure with a high corrosion inhibition property, and therefore, the corrosion inhibitor has a good corrosion inhibition performance; and by adding a synergist, acetylenic bonds in acetylenic alcohol molecules can suffer hydrogenation reaction with nascent hydrogen in the corrosion process, and the corrosion inhibitor can form a multilayer protective film in the reaction process, and effectively inhibits the corrosion rate. Thecorrosion inhibitor does not contain phosphorus, and has a good environmental protection property.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a corrosion inhibitor for ethylene chemical industry. Background technique [0002] Ethylene is a colorless, slightly odorous gas with a density of 1.256g / L, which is slightly less dense than air. It is hardly soluble in water but easily soluble in organic solvents such as carbon tetrachloride. Ethylene is the basic chemical raw material for synthetic fibers, synthetic rubber, synthetic plastics (polyethylene and polyvinyl chloride), synthetic ethanol (alcohol), and is also used to manufacture vinyl chloride, styrene, ethylene oxide, acetic acid, acetaldehyde, and ethanol Ethylene is one of the most produced chemical products in the world, and the ethylene industry is the core of the petrochemical industry. Ethylene products account for more than 75% of petrochemical products and occupy an important position in the national economy. The world has taken ethylene product...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of corrosion inhibitor for ethylene chemical industry, to solve the need to use corrosion inhibitor in the current ethylene processing process in the above background technology, but the existing corrosion inhibitor will produce harmful substances after use, which is not good for the environment Friendly, and the anti-corrosion effect of the corrosion inhibitor is not good

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