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Water-soluble non-ionic 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 limited use, affecting the use effect, poor water solubility, etc., and achieve excellent corrosion inhibition performance , Good water solubility and good compatibility

Inactive Publication Date: 2013-09-25
河北天化盛泉化工有限公司
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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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  • Water-soluble non-ionic imidazoline corrosion inhibitor and preparation method thereof
  • Water-soluble non-ionic imidazoline corrosion inhibitor and preparation method thereof
  • Water-soluble non-ionic imidazoline corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 103.00g (1mol) of diethylenetriamine and 200.00g (1mol) of lauric acid into a 2L high-temperature reactor equipped with mechanical stirring, condenser, water separator and temperature sensor, add 500.00g of water-carrying agent toluene and Dehydration catalyst Al 2 o 3 0.30g, through N 2 Exclude the air in the system, and raise the temperature to 200°C to dehydrate the reactant. After the amount of dehydration reaches 32.40ml, evaporate the water-carrying agent toluene to obtain a brown viscous liquid. Transfer this brown viscous liquid to 2L pressure reactor, add etherification catalyst KOH0.30g, pass N 2 Exclude the air in the system, raise the temperature to 150°C, and feed 660.00g (15mol) of ethylene oxide to carry out the etherification reaction; after the reaction pressure no longer drops, continue to feed 174.00g (3mol) of propylene oxide to carry out the etherification reaction; After the reaction pressure no longer drops, continue to feed 144.00g (2mol) ...

Embodiment 2

[0030] Add 103.00g (1mol) of diethylenetriamine and 284.00g (1mol) of stearic acid into a 2L high-temperature reactor equipped with mechanical stirring, condenser, water separator and temperature sensor, and add 800.00g of water-carrying agent toluene And dehydration catalyst platinum 0.04g, pass N 2 Exclude the air in the system, and raise the temperature to 240°C to dehydrate the reactant. After the amount of dehydration reaches 32.40ml, evaporate the water-carrying agent toluene to obtain a brown viscous liquid. Transfer this brown viscous liquid to 2L pressure reactor, add etherification catalyst NaOH0.90g, pass N 2 Exclude the air in the system, raise the temperature to 140°C, and pass in 116.00g (2mol) of propylene oxide to carry out the etherification reaction; after the reaction pressure no longer drops, continue to pass in 528.00g (12mol) of ethylene oxide to carry out the etherification reaction; After the reaction pressure no longer drops, continue to feed 288.00g ...

Embodiment 3

[0034] Add 146.00g (1mol) of triethylenetetramine and 282.00g (1mol) of oleic acid into a 2L high-temperature reactor equipped with mechanical stirring, condenser, water separator and temperature sensor, and add 900.00g of water-carrying agent xylene And dehydration catalyst tetrabutylammonium bromide 0.50g, logical N 2 Exclude the air in the system, and raise the temperature to 180°C to dehydrate the reactant. After the dehydration amount reaches 32.40ml, distill out the water-carrying agent xylene to obtain a brown viscous liquid. Transfer this brown viscous liquid to 2L pressure reactor, add etherification catalyst CH 3 ONa0.50g, through N 2 Exclude the air in the system, raise the temperature to 120°C, and feed 144.00g (2mol) of 1,2-epoxybutane to carry out the butyric etherification reaction; after the reaction pressure no longer drops, continue to feed 440.00g (10mol) of epoxy Carry out the etherification reaction of ethane; after the reaction pressure no longer drops,...

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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 preparation and application of corrosion inhibitors, and in particular relates to a water-soluble nonionic imidazoline corrosion inhibitor and a preparation method thereof. technical background [0002] Corrosion damage is one of the main causes of metal material damage in oil and gas extraction and petrochemical industries, and the resulting losses are huge. There are many ways to solve the corrosion problem, among which the method of using corrosion inhibitor is the most simple and economical. Among the many types 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 are excellent in inhibiting CO 2 、H 2 The corrosion performance of S makes it the most widely used corrosion inhibitor in the anticorrosion of oil and gas field equipment. [0003] In the synth...

Claims

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Application Information

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IPC IPC(8): C23F11/14C23F11/173C07D233/16C07D233/06C08G65/26
Inventor 李光海吕萍王宏义柳如秀
Owner 河北天化盛泉化工有限公司
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