N-caprylic acid diisopropanol amide, preparation method thereof and corrosion inhibitor

A technology of n-octanoic acid diisopropanolamide and diisopropanolamide, which is applied in the field of metal corrosion inhibition, can solve the problem that corrosion inhibitors cannot have both, and achieves the effects of good aluminum corrosion inhibition effect, low production cost and easy operation.

Active Publication Date: 2021-03-12
德旭新材料(广州)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the application provides a n-octanoic acid diisopropanolamide and its preparation method and corrosion inhibitor, which can effectively solve the problem that existing corrosion inhibitors cannot have both non-foaming, good corrosion inhibition effect and lubricating effect question

Method used

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  • N-caprylic acid diisopropanol amide, preparation method thereof and corrosion inhibitor
  • N-caprylic acid diisopropanol amide, preparation method thereof and corrosion inhibitor
  • N-caprylic acid diisopropanol amide, preparation method thereof and corrosion inhibitor

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preparation example Construction

[0036] The preparation method of the embodiment of the application is as follows:

[0037] (1) Put 17%~27wt.% n-octanoic acid into the reactor, heat up to 90°C, and set aside;

[0038] (2) 73%~83wt.% diisopropanolamine is slowly dropped into the reactor;

[0039] (3) Put 0.1-0.2wt.% of the catalyst 18-crown-6 into the reaction kettle, raise the temperature to 110-125°C, react at this temperature for about 4-5 hours, and simultaneously turn on the vacuum pump to discharge The water generated by the reaction was stopped heating when no more water was distilled out.

[0040] (4) naturally cool to room temperature, discharge, and make n-octanoic acid diisopropanolamide.

[0041] The CAS of the oleic acid diethanolamide used in Comparative Example 1 below is 93-83-4, and the chemical formula is: CH 3 (CH 2 ) 7 CH=CH(CH 2 ) 7 C(=O)N(CH 2 CH 2 Oh) 2 . The tall oleic acid diethanolamide in Comparative Example 2 is tall oleic acid diethanolamide synthesized from tall oleic a...

Embodiment 1

[0043] The embodiment of the present application provides the preparation method of n-octanoic acid diisopropanolamide, specifically comprising:

[0044] (1) 23% n-octanoic acid is put into the reactor, and the temperature is raised to 90° C. for subsequent use;

[0045] (2) 77% diisopropanolamine is slowly dropped into the reactor;

[0046] (3) Put 0.1 to 0.2% of the catalyst 18-crown-6 into the reactor, raise the temperature to 118°C, and react at this temperature for about 4.5 hours. At the same time, turn on the vacuum pump to discharge the water generated by the reaction until there is no more Heating was stopped when the water distilled off.

[0047] (4) naturally cool to room temperature, discharge, namely n-octanoic acid diisopropanolamide as described in formula I.

[0048] (5) The n-octanoic acid diisopropanolamide described in the embodiment of the present application is carried out infrared spectrum analysis and nuclear magnetic resonance spectrum analysis, the r...

Embodiment 2

[0050] The embodiment of the present application provides the corrosion inhibition performance test of the LY12 aluminum alloy of embodiment 1, comparative example 1, comparative example 2 and comparative example 3, and the specific steps are as follows:

[0051] With reference to the corrosion test method in "GB6144-2010 Synthetic Cutting Fluid", test example 1, comparative example 1 (oleic acid diethanolamide), comparative example 2 (tall oleic acid diethanolamide) and comparative example 3 (conventional non-foaming corrosion inhibitor sodium silicate) of LY12 aluminum alloy corrosion inhibition performance.

[0052] 1. Configure the working solution: respectively configure Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 3 into corresponding working solutions with concentrations of 0.05%, 0.1%, 0.2%, 0.5%, and 0.8%. The solute in the liquid is Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 3, and the solvent is...

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Abstract

The invention belongs to the technical field of metal corrosion inhibition, and particularly relates to n-caprylic acid diisopropanolamide, a preparation method thereof and a corrosion inhibitor. Thefirst aspect of the invention provides n-caprylic acid diisopropanolamide. The n-caprylic acid diisopropanolamide has a structure as shown in a formula I which is described in the specification, the second aspect of the invention provides a preparation method of n-caprylic acid diisopropanolamide, which comprises the following step: mixing n-caprylic acid, diisopropanolamine and a phase transfer catalyst to react, thereby obtaining the n-caprylic acid diisopropanolamide as shown in the formula I. The n-caprylic acid diisopropanol amide, the preparation method thereof and the corrosion inhibitor provided by the invention can effectively solve the technical problem that the existing corrosion inhibitor cannot have the effects of no foaming, good corrosion inhibition effect and good lubricating effect at the same time.

Description

technical field [0001] The application belongs to the technical field of metal corrosion inhibition, and in particular relates to a n-octanoic acid diisopropanolamide, a preparation method thereof, and a corrosion inhibitor. Background technique [0002] Metal corrosion refers to the damage or deterioration of metals caused by the external environment. A chemical or electrochemical multiphase reaction occurs on the surface of the metal, turning the metal into an oxidized state, which will significantly reduce the strength, plasticity, and toughness of the metal material. and other mechanical properties. Aluminum alloy has been widely used in various fields because of its unique metal properties, and its anti-corrosion problem has also received more attention. Aluminum is an active amphoteric metal, which is more sensitive to acid and alkali and more prone to corrosion than ferrous metals. Traditional corrosion inhibitors have the problems of easy foaming and poor corrosion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/02C10M133/16C23F11/14C10N30/06C10N30/12
CPCC07C231/02C23F11/145C10M133/16C10M2215/082C07C233/18
Inventor 何锦梅江存何锦凤
Owner 德旭新材料(广州)股份有限公司
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