Imidazoline type neutralization corrosion inhibitor and preparation method thereof

An imidazoline-type and imidazoline technology is applied in the field of preparation of imidazoline-type neutralizing corrosion inhibitors, which can solve the problems of inability to inhibit corrosion under salt scale, poor dispersibility of corrosion inhibitors, etc. High efficiency and wide application range

Active Publication Date: 2014-10-15
山东京博众诚清洁能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly aims at the disadvantages of poor dispersibility of corrosion inhibitors in the prior art, which cannot inhibit the under-scaling corrosion of salt, etc., and provides a new type of corrosion inhibitor

Method used

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  • Imidazoline type neutralization corrosion inhibitor and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] An imidazoline type neutralizing corrosion inhibitor, which is composed of the following components in parts by weight:

[0029] 15 parts of imidazoline derivatives and long-chain organic amine mixture, and the mass ratio of imidazoline derivatives and long-chain organic amines is 3:1;

[0030] 10 parts of a mixture of 20% ammonia water and methylamine in any proportion

[0031] Polyethylene glycol 2 parts

[0032] 35 parts of methanol

[0033] Weigh the main corrosion inhibitor, neutralizer and dispersant according to the measured parts, put them into the measured parts of the solvent, and stir evenly to obtain the imidazoline type neutralized corrosion inhibitor.

Embodiment 2

[0035] An imidazoline type neutralizing corrosion inhibitor, which is composed of the following components in parts by weight:

[0036] 40 parts of imidazoline derivatives and long-chain organic amine mixture, and the mass ratio of imidazoline derivatives and long-chain organic amines is 5:1;

[0037] Concentration is 20% mixture of ammonia water and dimethylamine 20 parts

[0038] Lignosulfonate 5 parts

[0039] Ethylene glycol 73 parts

[0040] Weigh the main corrosion inhibitor, neutralizing agent and dispersant according to the measured parts, and put them directly into the measured parts of the solvent, and stir evenly to obtain the imidazoline type neutralized corrosion inhibitor.

Embodiment 3

[0042] An imidazoline type neutralizing corrosion inhibitor, which is composed of the following components in parts by weight:

[0043] 30 parts of imidazoline derivatives and long-chain organic amine mixture, and the mass ratio of imidazoline derivatives and long-chain organic amines is 4:1;

[0044] Concentration is 20% ammonia water and ethylamine mixture 15 parts

[0045] 3 parts petroleum sulfonate

[0046] Propylene glycol 50 parts

[0047] Weigh the main corrosion inhibitor, neutralizing agent and dispersant according to the measured parts, and put them directly into the measured parts of the solvent, and stir evenly to obtain the imidazoline type neutralized corrosion inhibitor.

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Abstract

The invention relates to water soluble neutralization corrosion inhibitor mainly used for corrosion prevention of metal in a low-temperature light oil part of an oil refinery, and a preparation method thereof. The water soluble neutralization corrosion inhibitor is imidazoline type derivative corrosion inhibitor prepared by using oleic acid, polyene polyamine and quaternization reagent as raw materials, and is prepared by compounding assistant corrosion inhibitor, neutralizing agent and solvent; compared with similar corrosion inhibitor, the additive dosage is low (5-10 ppm); and the corrosion inhibitor has good water solubility, high corrosion inhibition efficiency and good chemical stability and heat stability, and has dual effects of film corrosion inhibitor and neutralization to enable the scene operation to become simple.

Description

technical field [0001] The invention belongs to the field of metal corrosion inhibition, and more specifically relates to the preparation of an imidazoline-type neutralizing corrosion inhibitor for preventing the corrosion of the fractionation tower top and cooling and condensing system equipment of devices such as atmospheric and decompression, catalytic cracking, and coking. technical background [0002] With the in-depth development of crude oil, the proportion of low-quality crude oil is increasing, resulting in increasingly serious corrosion problems in refinery equipment. Among them, the corrosion of low-temperature light oil equipment in primary and secondary processing equipment is particularly prominent, such as the top of the atmospheric and vacuum equipment. Condensation cooling system, catalytic cracking stable absorption system and delayed coking fractionation overhead condensation cooling system. The corrosion of the condensation cooling system at the top of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/14
Inventor 张红娟侯晓峰刘振学牟庆平姚刚
Owner 山东京博众诚清洁能源有限公司
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