Water-soluble corrosion inhibitor, preparation and application thereof

A corrosion inhibitor, water-soluble technology, used in the treatment of equipment corrosion/fouling inhibition, petroleum industry, hydrocarbon oil treatment, etc., can solve the problem of narrow use range, and achieve low cost, good water solubility, low toxicity and no odor on site effect of operation
CN101280222AInactive Publication Date: 2008-10-08LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
Publication Date
2008-10-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a water soluble corrosion inhibitor, the preparation method and the application of the corrosion inhibitor, solving the defect of narrow application range of the corrosion inhibitor pH in the prior art; the water soluble corrosion inhibitor is composed of 20-70 weight proportion of imidazolines derivates, 1-10 weight proportion of pyridine derivates, 1-20 weight proportion of corrosion inhibition auxiliary agent and 10-50 weight proportion of solvent, based on the total weight of the corrosion inhibitor as the reference. The water soluble corrosion inhibitor in the invention has corrosion inhibition effect on the metal material in the medium with wide PH variation range (pH equals to 1-10) and good metal surface film formation property.
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Description

Technical field

[0001] The invention belongs to the field of metal corrosion inhibition, and more specifically relates to a water-soluble corrosion inhibitor for preventing equipment corrosion in low-temperature light oil parts of a refinery and its preparation method and application. Background technique

[0002] With the in-depth development of crude oil, the proportion of low-quality crude oil is increasing, causing the corrosion problem of refinery equipment to become increasingly serious. Among them, the corrosion of equipment in the low-temperature light oil parts of primary and secondary processing units is particularly prominent, such as the top of the atmospheric and vacuum unit. Condensation cooling system, catalytic cracking stable absorption system and delayed coking fractionation tower top condensation cooling system. The corrosion of the condensation cooling system at the top of the atmospheric and vacuum unit is mainly due to H 2 S-HCl-H 2 O-type corrosion, ...

Claims

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