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Coking corrosion inhibitor

A corrosion inhibitor and compounding agent technology, applied in the direction of corrosion prevention during distillation, can solve the problems of poor density of the adsorption film, increased corrosion inhibition effect, and reduced usage of amine compounding agent, so as to achieve not easy to fall off, easy to degrade, and low cost Effect

Active Publication Date: 2020-02-04
上海贵通新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Another object of the present invention is to provide a coking corrosion inhibitor, which is low in cost and easy to degrade. It is compounded and used with amino acid composition, amine compounding agent and polyacrylamide, and has obvious corrosion inhibition effect. The coking inhibitor used in the present invention The corrosion agent uses amino acid composition as the main raw material and the first-generation corrosion inhibitor greatly reduces the amount of amine complex agent used, and uses carbon-based materials to load amino acids to solve the disadvantage of poor density of the green corrosion inhibitor adsorption film in the prior art , which makes the corrosion inhibitor more environmentally friendly and the corrosion inhibition effect is significantly increased compared with the first generation corrosion inhibitor

Method used

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Embodiment 1

[0028] A coking corrosion inhibitor comprising the following raw materials in parts by weight:

[0029] 30 parts by weight of sulfur-containing amino acid composition, 12 parts of amine compounding agent, 10 parts of polyacrylamide and 6 parts of synergist;

[0030] Among them, the sulfur-containing amino acid composition is cysteine ​​and cystine, and its weight ratio is 1:2; the amine complex agent includes: 40 parts of ethanolamine, 45 parts of diethanolamine, and 10 parts of triethanolamine; the synergist includes: Glycerol and citric acid, wherein the weight ratio of glycerol and citric acid is 1:2.

[0031] The concrete preparation method of described coking corrosion inhibitor:

[0032] S1. Mix 40 parts of ethanolamine, 45 parts of diethanolamine, and 10 parts of triethanolamine at room temperature, and then add 6 parts of synergist, wherein the weight ratio of glycerol and citric acid in the synergist is 1:1.5, Get A component;

[0033] S2. Take cysteine ​​and cysti...

Embodiment 2

[0036] A coking corrosion inhibitor comprising the following raw materials in parts by weight:

[0037] 35 parts by weight of sulfur-containing amino acid composition, 14 parts of amine compounding agent, 11 parts of polyacrylamide and 12 parts of synergist;

[0038] Wherein, the weight ratio of methionine, cysteine ​​and cystine is 1:1:3; the synergist includes: glycerol and citric acid, wherein the weight ratio of glycerol and citric acid is 1:3.

[0039] The concrete preparation method of described coking corrosion inhibitor:

[0040] S1. The preparation method of the amine composite agent is as follows: take 50-70% ammonia water, add ethylene oxide to the ammonia water, the substance ratio of ammonia to ethylene oxide is 4.5:1, at 150 ° C, The pressure is 16MPa under the condition of reaction 2h, wherein, ethanolamine 40%, diethanolamine 42%, triethanolamine 14%, take 14 parts of amine complex agent, add 12 parts of synergist to amine complex agent, wherein, synergist is ...

Embodiment 3

[0044] A coking corrosion inhibitor comprising the following raw materials in parts by weight:

[0045] 32 parts by weight of sulfur-containing amino acid composition, 15 parts of amine compounding agent, 12 parts of polyacrylamide and 8 parts of synergist;

[0046] Among them, the sulfur-containing amino acid composition is methionine and cystine, and its weight ratio is 1.5:2; the amine complex agent includes: 55 parts of ethanolamine, 30 parts of diethanolamine, and 20 parts of triethanolamine; the synergist includes: glycerol and Citric acid, wherein the weight ratio of glycerol and citric acid is 1:3.

[0047] The concrete preparation method of described coking corrosion inhibitor:

[0048] S1. Mix 55 parts of ethanolamine, 30 parts of diethanolamine, and 20 parts of triethanolamine at room temperature, and then add 8 parts of synergist to obtain component A, wherein the weight ratio of glycerol and citric acid in the synergist 1:3;

[0049] S2. Take methionine and cys...

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Abstract

The invention discloses a coking corrosion inhibitor. The coking corrosion inhibitor comprises, by weight, 30-35 parts of a sulfur-containing amino acid composition, 12-15 parts of an amine complexingagent, 10-12 parts of polyacrylamide and 6-12 parts of a synergist. The coking corrosion inhibitor has the advantages of low cost, and easiness in degradation; the amino acid composition, the amine complexing agent and polyacrylamide are compounded for use, so the corrosion inhibition effect is obvious; the amino acid composition used as a main raw material is matched with a first-generation corrosion inhibitor, so that the use amount of the amine complexing agent is greatly reduced; and the defect of poor compactness of an adsorption film of a green corrosion inhibitor in the prior art is overcome in a mode of loading amino acids on a carbon-based material, so that the corrosion inhibitor is environmentally friendly, and has an obviously better corrosion inhibition effect than the first-generation corrosion inhibitor.

Description

technical field [0001] The invention relates to the field of fine chemical technology. More specifically, the present invention relates to a coking corrosion inhibitor. Background technique [0002] The corrosive environment of the refinery is at low temperature (T<120°C) light oil H 2 S-H 2 O-type corrosive environment; high-temperature (240-500°C) heavy oil-type corrosive environment, high-temperature vulcanization, in the sulfur recovery unit, in the high-temperature sulfur-containing process gas after combustion, the gas flow composition is H 2 S, SO 2 , sulfur vapor, CS 2 , COS, CO 2 、H 2 O and nitrogen, etc. [0003] Chinese patent CN107338072B describes a corrosion inhibitor for reforming unit, which includes: amine compounding agent, wherein the amine compounding agent is monoethanolamine, diethanolamine, triethanolamine according to a certain proportion by weight, with glycerol and citric acid as The synergist is obtained, and its polar group can be adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G7/10
CPCC10G7/10
Inventor 徐文忠
Owner 上海贵通新材料科技有限公司
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