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A kind of water-soluble nonionic imidazoline corrosion inhibitor and preparation method thereof

A type of imidazoline and corrosion inhibitor technology, applied in the field of water-soluble non-ionic imidazoline corrosion inhibitor and its preparation, can solve the problems of use limitation, poor water solubility, affecting the use effect, etc., and achieve excellent corrosion inhibition performance , good water solubility, good compatibility

Inactive Publication Date: 2015-08-05
河北盛泉新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Imidazoline corrosion inhibitors can be divided into cationic imidazolines, anionic imidazolines, amphoteric imidazolines and nonionic imidazolines, among which the first three are ionic imidazoline corrosion inhibitors, because their molecular structure contains ionic charges, In the process of use, it often affects the use effect of other agents in the system; although non-ionic imidazoline corrosion inhibitors do not contain charges, they often have poor water solubility, so their use is limited

Method used

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  • A kind of water-soluble nonionic imidazoline corrosion inhibitor and preparation method thereof
  • A kind of water-soluble nonionic imidazoline corrosion inhibitor and preparation method thereof
  • A kind of water-soluble nonionic imidazoline corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 103.00g (1mol) diethylenetriamine and 200.00g (1mol) lauric acid to a 2L high temperature reactor equipped with mechanical stirrer, condenser, water separator and temperature sensor, and add 500.00g of toluene with water agent and Dehydration catalyst Al 2 O 3 0.30g, pass N 2 The air in the system is removed, and the temperature is raised to 200°C to cause the reactant to undergo a dehydration reaction. After the dehydration volume reaches 32.40ml, the water-containing toluene is evaporated to obtain a brown viscous liquid. Transfer the brown viscous liquid to a 2L pressure reactor, add 0.30g etherification catalyst KOH, and pass N 2 Exclude the air in the system, raise the temperature to 150°C, and pass in 660.00g (15mol) of ethylene oxide to carry out the etherification reaction; after the reaction pressure no longer drops, continue to pass in 174.00g (3mol) of propylene oxide to carry out the propyl etherification reaction; After the reaction pressure no longer dro...

Embodiment 2

[0030] Add 103.00g (1mol) diethylenetriamine and 284.00g (1mol) stearic acid to a 2L high temperature reactor equipped with mechanical stirring, condenser, water separator and temperature sensor, and add 800.00g of toluene with water agent And dehydration catalyst platinum 0.04g, through N 2 The air in the system was removed, and the temperature was raised to 240°C to cause the reactant to undergo dehydration reaction. After the dehydration volume reached 32.40ml, the water-containing toluene was evaporated to obtain a brown viscous liquid. Transfer the brown viscous liquid to a 2L pressure reactor, add 0.90g of etherification catalyst NaOH, and pass N 2 Exclude the air in the system, raise the temperature to 140°C, and pass in 116.00g (2mol) of propylene oxide for propyl etherification; after the reaction pressure no longer drops, continue to pass 528.00g (12mol) of ethylene oxide for etherification; After the reaction pressure no longer drops, continue to pass 288.00g (4mol) 1...

Embodiment 3

[0034] Add 146.00g (1mol) triethylenetetramine and 282.00g (1mol) oleic acid into a 2L high-temperature reactor equipped with mechanical stirrer, condenser, water separator and temperature sensor, and add 900.00g xylene with water agent And dehydration catalyst tetrabutylammonium bromide 0.50g, pass N 2 The air in the system is removed, and the temperature is raised to 180°C to cause the reactant to undergo a dehydration reaction. After the dehydration volume reaches 32.40ml, the water-containing xylene is evaporated to obtain a brown viscous liquid. Transfer the brown viscous liquid to a 2L pressure reactor, add etherification catalyst CH 3 ONa0.50g, pass N 2 Exclude the air in the system, raise the temperature to 120°C, and pass in 144.00g (2mol) 1,2-butylene oxide for the butyl etherification reaction; pass it in and continue to pass in 440.00g (10mol) epoxy after the reaction pressure no longer drops Ethane undergoes etherification reaction; after the reaction pressure does ...

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Abstract

The invention provides a water-soluble non-ionic imidazoline corrosion inhibitor and a preparation method thereof. Organic polyamine, an organic acid and an etherification reagent undergo a dehydration cyclization reaction and an etherification reaction to produce the water-soluble non-ionic imidazoline corrosion inhibitor. A molecular structure of the water-soluble non-ionic imidazoline corrosion inhibitor does not contain ionic charge, has good water solubility, can be used individually, can be compounded with other agents into a compound for metal corrosion protection of an oil gas gathering pipe, an oilfield sewage system and an oilfield reinjection water system, has the excellent effect for preventing common Cl<->, H2S and CO2 corrosion on an oilfield system, and has good compatibility with other oilfield chemical agents such as a de-emulsifier, a scale inhibitor and a bactericide.

Description

Technical field [0001] The invention belongs to the field of corrosion inhibitor preparation and application, and specifically relates to a water-soluble non-ionic imidazoline corrosion inhibitor and a preparation method thereof. technical background [0002] Corrosion damage is one of the main reasons for the damage of metal materials in the oil and gas exploitation and petrochemical industry, and the losses caused by this are very huge. There are many ways to solve the corrosion problem, among which the method of using corrosion inhibitor is the simplest and most economical. Among the many kinds of corrosion inhibitors, imidazoline corrosion inhibitors are the most widely used because of their good corrosion inhibition effect, wide variety and low toxicity, especially imidazoline corrosion inhibitors excellent in inhibiting CO 2 , H 2 S corrosion performance makes it the most widely used corrosion inhibitor for oil and gas field equipment. [0003] In the synthesis process of im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/14C23F11/173C07D233/16C07D233/06C08G65/26
Inventor 李光海吕萍王宏义柳如秀
Owner 河北盛泉新材料有限公司