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Asymmetric long-chain alkyl benzyl imidazoline polyethylene long-chain alkyl amide cationic compound as well as preparation and application thereof

A technology of long-chain alkyl benzyl imidazoline polyvinyl and long-chain alkyl amide, applied in the direction of organic chemistry, etc., can solve the problem of less corrosion inhibitor, achieve excellent film-forming ability, improve oil-soluble water dispersibility, The effect of excellent oil-soluble water dispersibility

Active Publication Date: 2021-06-29
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are many literatures and patent reports on imidazoline and its derivatives corrosion inhibitors, they are specifically aimed at the use of corrosion inhibitors in high hydrogen sulfide gas fields, especially my country’s high hydrogen sulfide Puguang gas field (with a content of 1.5MPa). less research

Method used

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  • Asymmetric long-chain alkyl benzyl imidazoline polyethylene long-chain alkyl amide cationic compound as well as preparation and application thereof
  • Asymmetric long-chain alkyl benzyl imidazoline polyethylene long-chain alkyl amide cationic compound as well as preparation and application thereof
  • Asymmetric long-chain alkyl benzyl imidazoline polyethylene long-chain alkyl amide cationic compound as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Preparation of unsymmetrical long-chain alkyl benzyl imidazoline polyvinyl long-chain alkylamide cationic corrosion inhibitor

[0054] (I) Preparation of long-chain alkyl imidazoline polyvinylamine nonionic

[0055] Add 1.0mol (282.5g) oleic acid, 1.2mol (123.6g) diethylenetriamine, 0.6g Aluminum oxide and 120g xylene, under constant stirring, heat up to 160°C, react at a constant temperature for 2 hours, then raise the temperature to 200°C, react at a constant temperature for 3 hours, then raise the temperature to 230°C, and react at a constant temperature until no droplets are generated in the water separator , cooled to 70°C and discharged to obtain long-chain alkyl imidazoline ethylene amine non-ion.

[0056] Its FT-IR and 1 The H-NMR spectrum is as follows figure 1 , figure 2 shown

[0057] (Ⅱ) Preparation of unsymmetrical long chain alkyl benzyl imidazoline and long chain alkyl polyvinylamide cationic corrosion inhibitor

[0058] Lower the temperature of th...

Embodiment 2

[0061] Preparation of unsymmetrical long-chain alkyl benzyl imidazoline polyvinyl long-chain alkylamide cationic corrosion inhibitor

[0062] (I) Preparation of long-chain alkyl imidazoline polyvinylamine nonionic

[0063] Add 1.0mol (282.5g) oleic acid, 1.2mol (175.2g) triethylenetetramine, 0.7g Aluminum oxide and 120g xylene, under constant stirring, heat up to 160°C, react at a constant temperature for 2 hours, then raise the temperature to 200°C, react at a constant temperature for 3 hours, then raise the temperature to 240°C, and react at a constant temperature until no droplets are generated in the water separator , cooled to 70°C and discharged to obtain long-chain alkyl imidazoline polyethylene polyamine nonionic.

[0064] (Ⅱ) Preparation of unsymmetrical long chain alkyl benzyl imidazoline and long chain alkyl polyvinylamide cationic corrosion inhibitor

[0065] Lower the temperature of the reaction system in step (I) to 120°C, add 1.0mol (282.5g) of oleic acid into...

Embodiment 3

[0067] Preparation of unsymmetrical long-chain alkyl benzyl imidazoline polyvinyl long-chain alkylamide cationic corrosion inhibitor

[0068] (I) Preparation of long-chain alkyl imidazoline polyvinylamine nonionic

[0069] Add 1.0mol (284.5g) stearic acid, 1.2mol (175.2g) triethylenetetramine, 0.7 g alumina and 120g xylene, under constant stirring, raise the temperature to 160°C, react at a constant temperature for 2 hours, then raise the temperature to 200°C, react at a constant temperature for 3 hours, then raise the temperature to 240°C, react at a constant temperature until there are no droplets in the water separator Produced, cooled to 70°C and discharged to obtain long-chain alkyl imidazoline polyethylene polyamine non-ion.

[0070] (Ⅱ) Preparation of unsymmetrical long chain alkyl benzyl imidazoline and long chain alkyl polyvinylamide cationic corrosion inhibitor

[0071] Lower the temperature of the reaction system in step (I) to 120°C, add 1.0mol (284.5g) of oleic ...

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Abstract

The invention discloses an asymmetric long-chain alkyl benzyl imidazoline polyethylene long-chain alkyl amide cationic compound. The structural formula of the cationic compound is as shown in formula I which is described in the specification. In the formula I, R1 and R2 are respectively and independently selected from CnH2n + 1 or C<n>H<2n-1>, n is a positive integer in a range of 12 to 18, and m is equal to 0, 1 or 2. The cationic compound can be used as a corrosion inhibitor for exploiting a high hydrogen sulfide gas field, has a high slow release rate in the high hydrogen sulfide gas field (wherein the hydrogen sulfide content can reach up to 1.5 MPa or above), has the advantages of no special pungent smell, low toxicity, good oil-soluble water dispersibility and strong film-forming ability, and presents wide application prospects in corrosion prevention of equipment and pipelines in high hydrogen sulfide gas field drilling and production and gathering and transportation. The invention also discloses a preparation method and application of the cationic compound.

Description

technical field [0001] The invention relates to the field of oil and gas field exploitation. More specifically, it relates to an asymmetric long-chain alkylbenzyl imidazoline polyvinyl long-chain alkylamide cationic compound, its preparation and application. Background technique [0002] At present, my country's natural gas reserves are very rich, and more and more gas fields have been proven, especially unconventional gas fields such as tight gas and shale gas. With the rapid development of my country's economy, the demand for oil and gas is increasing However, my country's oil reserves are relatively scarce. In recent years, my country's oil production has gradually declined, and the difficulty of mining has continued to increase. Crude oil production is far from meeting domestic energy demand. Therefore, it is necessary to increase the exploration and exploitation of gas fields to meet domestic energy requirements. . [0003] At present, my country's onshore proven gas fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/16C23F11/02C23F11/14
CPCC07D233/16C23F11/02C23F11/149
Inventor 徐志成宫清涛靳志强刘子瑜张磊马望京罗澜张路赵濉
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI