Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of non-phosphorus high temperature corrosion inhibitor and preparation method thereof

A high-temperature corrosion inhibitor and corrosion inhibitor technology, applied in the field of metal corrosion inhibition, can solve the problems of large amount of corrosion inhibitor, catalyst poisoning, poor corrosion inhibition effect, etc., to improve corrosion inhibition efficiency, enhance bonding strength and stability , the effect of inhibiting corrosion

Active Publication Date: 2018-02-16
SINOPEC LUOYANG PETROCHEM ENG CORP +1
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, phosphorus-based corrosion inhibitors are more effective than non-phosphorus-based corrosion inhibitors, but when phosphorus-based corrosion inhibitors are used, it is easy to cause catalyst poisoning in the subsequent deep processing process
The patent USP5252254 discloses a sulfonated nonylphenol high-temperature corrosion inhibitor prepared by reacting alkylphenol with sulfur trioxide or oleum, but the amount of corrosion inhibitor is large and the corrosion inhibition effect is low
USP5630964, USP5863415, USP6583091 and USP7491318 are organic polysulfide, piperazine, sulfophthalic acid and mercaptocarboxylate corrosion inhibitors respectively, which also have the disadvantages of large dosage and poor corrosion inhibition effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of non-phosphorus high temperature corrosion inhibitor and preparation method thereof
  • A kind of non-phosphorus high temperature corrosion inhibitor and preparation method thereof
  • A kind of non-phosphorus high temperature corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Mix 5-ethyl-2-thiazolidinethione and potassium hydroxide in a molar ratio of 1:1, then add absolute ethanol 4 times the total weight of the above substances, and mix and stir at room temperature. After mixing evenly, slowly add 1,9-dibromononane, and add 1,9-dibromononane at a molar ratio of 1:3 to alkylthiazolidinethione. After the addition was completed, the mixture was stirred and reacted at 50°C for 48 hours, then 1 / 2 volume of distilled water was added to the reaction product and allowed to stand still. After the precipitate was precipitated, it was suction filtered and dried to obtain the thiazoline sulfide compound A.

[0042] (2) Mix the thiazoline sulfide compound A prepared in step (1), butyl polysulfide compound, isooctylamine and xylene solvent in a mass ratio of 35:20:10:35 to obtain the high temperature corrosion inhibitor HCO1.

Embodiment 2

[0044] (1) Mix 5-octyl-2-thiazolidinethione and potassium hydroxide in a molar ratio of 1:1, then add absolute ethanol 8 times the total weight of the above substances, and mix and stir at room temperature. After mixing evenly, slowly add 1,2-dibromoethane, and add 1,2-dibromoethane at a molar ratio of 1:2 to alkylthiazolidinethione. After the addition was completed, the mixture was stirred and reacted at 40°C for 60 hours, then 1 / 2 volume of distilled water was added to the reaction product and allowed to stand still. A precipitate was precipitated, then suction filtered and dried to obtain the thiazoline sulfide compound B.

[0045] (2) Mix the thiazoline sulfide compound B prepared in step (1), isoprene polysulfide compound, dipropylamine, n-octylamine and toluene solvent in a mass ratio of 50:5:15:10:20 to obtain High temperature corrosion inhibitor HC02.

Embodiment 3

[0047] (1) Mix 5-butyl-2-thiazolidinethione and potassium hydroxide at a molar ratio of 1:1, then add absolute ethanol five times the total weight of the above substances, and mix and stir at room temperature. After mixing evenly, slowly add p-dibromomethylbenzene, and add p-dibromomethylbenzene at a molar ratio of 1:5 to alkylthiazolidinethione. After the addition was completed, the mixture was stirred and reacted at 70°C for 24 hours, then 1 / 2 volume of the reaction product was added with distilled water and left to stand. After the precipitate was precipitated, it was suction filtered and dried to obtain the thiazoline sulfide compound C.

[0048](2) Mix the thiazoline sulfide compound C prepared in step (1), cetyl polysulfide compound, n-dodecylamine and benzene solvent in a mass ratio of 15:40:5:40 to obtain a high-temperature corrosion inhibitor HC03.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a non-phosphor high-temperature inhibitor and a preparation method thereof. The non-phosphor high-temperature inhibitor comprises, by weight, 5-60% of thiazoline thioether compound, 1-50% of organic polysulfide, 1-30% of organic amine compound, and 10-70% of solvent; all the aforementioned components are calculated based on the total weight of the non-phosphor high-temperature inhibitor. The non-phosphor high-temperature inhibitor is applicable to a high-temperature naphthenic acid corrosion environment of an oil refining device and can obviously inhibit the corrosion of a naphthenic acid corrosion medium to metal equipment and pipelines; meanwhile, the inhibitor is free of the phosphorus element, so that subsequent processing devices are not damaged.

Description

technical field [0001] The invention belongs to the field of metal corrosion inhibition, and more specifically relates to a non-phosphorus high-temperature corrosion inhibitor for inhibiting high-temperature naphthenic acid corrosion of oil refinery equipment and pipelines and a preparation method thereof. Background technique [0002] At present, crude oil resources in the world are developing in the direction of inferiority, and the processing volume of acid-containing and sulfur-containing crude oil is increasing year by year. The processing of inferior crude oil has become a common problem faced by the world's oil refining enterprises. With the continuous increase in the processing of acid-containing and sulfur-containing crude oil, the corrosion of equipment is intensifying. Equipment corrosion is a problem that plagues the safe production and long-term operation of refinery units. Among them, high-temperature naphthenic acid corrosion is a major hidden danger that plag...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/16C23F11/173
Inventor 段永锋王宁赵小燕孙新乐刘强张庆源石运峰
Owner SINOPEC LUOYANG PETROCHEM ENG CORP