Didodecanyl-diformamide bipyridine quaternary ammonium salt soluble corrosion inhibitor and its preparation method and application

A technology of dicarboxamide bipyridine and dodecyl dimethyl benzyl ammonium chloride, applied in organic chemistry and other directions, can solve the problem of uniform corrosion of pipelines and equipment, decreased adsorption capacity of corrosion inhibitors, and decreased corrosion inhibition effect, etc. problem, to maximize the corrosion inhibition effect, improve the film coverage, and improve the adsorption capacity.

Active Publication Date: 2022-05-20
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0002] The internal transmission medium of oil and gas field gathering and transportation pipelines and equipment is mainly a mixture of oil, gas and water, rich in CO 2 And other acidic corrosive media, at the same time, the medium contains high chloride ions, which will cause serious uniform corrosion and localized corrosion to the inside of pipelines and equipment, resulting in a large number of economic losses and serious safety hazards
[0003] Adding a suitable high-efficiency corrosion inhibitor is one of the effective ways to prevent corrosion in pipelines and equipment, but in CO 2 In the gathering and transportation environment of oil and gas fields with saturated high salinity (salinity 20000mg / L-200000mg / L), the adsorption capacity of corrosion inhibitors is greatly reduced, and the corrosion inhibition effect is reduced. How to target CO 2 The development of new corrosion inhibitors in saturated high salinity corrosion environment has become a problem to be solved

Method used

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  • Didodecanyl-diformamide bipyridine quaternary ammonium salt soluble corrosion inhibitor and its preparation method and application
  • Didodecanyl-diformamide bipyridine quaternary ammonium salt soluble corrosion inhibitor and its preparation method and application
  • Didodecanyl-diformamide bipyridine quaternary ammonium salt soluble corrosion inhibitor and its preparation method and application

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preparation example Construction

[0049] According to a typical embodiment of the present invention, there is provided a method for preparing a didodecanyl-diformamide bipyridyl quaternary ammonium salt aqueous corrosion inhibitor, which is used to prepare the aforementioned didodecanyl-diformamide bipyridyl Quaternary ammonium salt soluble corrosion inhibitors, including:

[0050] Preparation of dodecyl-diformamide bipyridine quaternary ammonium salt mixed solution;

[0051] According to the mass parts, cetyl trimethyl ammonium bromide, dodecyl dimethyl benzyl ammonium chloride, diethylene glycol monobutyl ether, ethylene glycol monobutyl ether, diglycolamine, 3-octyn 1-alcohol, N,N-dimethylformamide and the didodecanyl-diformamide bipyridine quaternary ammonium salt mixture are mixed to obtain the didodecanyl-diformamide bipyridine quaternary ammonium salt mixture. Pyridinium quaternary ammonium salt soluble corrosion inhibitor.

[0052] In some optional embodiments, the preparation of the didodecanyl-dica...

Embodiment 1

[0063] The didodecyl-diformamide bipyridyl quaternary ammonium salt soluble corrosion inhibitor provided in this example and its preparation are as follows:

[0064] 1) React 2,2'-bipyridine-4,4'-dicarboxylic acid and dodecylamine at 110°C for 4h, add benzyl chloride after the reaction is complete, and react at 80°C for 4.5h to obtain Didodecyl-diformamide bipyridine quaternary ammonium salt mixture;

[0065] 2) 15 parts by weight of the didodecanyl-diformamide bipyridine quaternary ammonium salt mixed solution prepared in step 1), and 2 parts of cetyltrimethylammonium bromide, 1 part of dodecyl Alkyl dimethyl benzyl ammonium chloride, 10 parts of diethylene glycol monobutyl ether, 10 parts of ethylene glycol monobutyl ether, 2 parts of diglycolamine, 1 part of 3-octyn 1-ol, The rest is N,N-dimethylformamide, fully dissolved and mixed at 40°C to obtain the dodecyl-diformamide bipyridyl quaternary ammonium salt soluble corrosion inhibitor.

[0066] refer to figure 1 , figur...

Embodiment 2

[0068] The didodecyl-diformamide bipyridyl quaternary ammonium salt soluble corrosion inhibitor provided in this example and its preparation are as follows:

[0069] 1) React 2,2'-bipyridyl-4,4'-dicarboxylic acid and dodecylamine at 110°C for 4 hours, add benzyl chloride after the reaction is complete, and react at 70°C for 4 hours to obtain bis Lauryl-diformamide bipyridine quaternary ammonium salt mixture.

[0070] 2) 15 parts by weight of the didodecyl-diformamide bipyridine quaternary ammonium salt mixed solution prepared in step 1), and 3 parts of cetyltrimethylammonium bromide, 2 parts of dodecyl Alkyl dimethyl benzyl ammonium chloride, 12 parts of diethylene glycol monobutyl ether, 12 parts of ethylene glycol monobutyl ether, 3 parts of diglycolamine, 1 part of 3-octyn 1-ol, The rest is N,N-dimethylformamide, fully dissolved and mixed at 45°C to obtain the dodecyl-diformamide bipyridyl quaternary ammonium salt soluble corrosion inhibitor.

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Abstract

The present invention specifically relates to a dodecyl-dicarboxamide bipyridine quaternary ammonium salt soluble corrosion inhibitor and its preparation method and application, belonging to the technical field of metal anti-corrosion materials. The dodecyl-dicarboxamide provided by the invention Formamide bipyridine quaternary ammonium salt solution corrosion inhibitor includes didodecyl-diformamide bipyridine quaternary ammonium salt mixture; add 30mg / L of dodecyl-dicarboxamide bipyridine quaternary ammonium salt prepared by this implementation case Ammonium salt soluble corrosion inhibitor, which can achieve corrosion inhibition efficiency of steel sheet > 95%.

Description

technical field [0001] The invention belongs to the technical field of metal anticorrosion materials, and in particular relates to a dodecyl-diformamide bipyridyl quaternary ammonium salt soluble corrosion inhibitor and a preparation method and application thereof. Background technique [0002] The internal transmission medium of oil and gas field gathering and transportation pipelines and equipment is mainly a mixture of oil, gas and water, rich in CO 2 Such acidic corrosive media, and the high content of chloride ions in the medium, will cause serious uniform corrosion and localized corrosion to the inside of pipelines and equipment, resulting in a large number of economic losses and serious safety hazards. [0003] Adding a suitable high-efficiency corrosion inhibitor is one of the effective ways to prevent corrosion in pipelines and equipment, but in CO 2 In the gathering and transportation environment of oil and gas fields with saturated high salinity (salinity 20000mg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/14C07D213/82
CPCC23F11/149C07D213/82
Inventor 李玲杰张红磊杨耀辉张彦军娄亮杰王志涛张盈盈王伟
Owner BC P INC CHINA NAT PETROLEUM CORP
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