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Synthesis method of N, N-bi(piperidylmethyl)-cyclohexylamine

A technology of dimethylolcyclohexylamine and piperidinylmethyl, which is applied in the field of synthesis of N,N-di-cyclohexylamine, can solve the problems of few product varieties and limited application coverage, and achieve the purpose of inhibiting corrosion and reaction Simple and easy to operate effect

Active Publication Date: 2014-11-19
兴化市庆丰锌品有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with advanced countries, China's vapor phase antirust technology still has the problems of fewer product varieties and limited application coverage. Therefore, it is necessary to increase the promotion of advanced technologies and at the same time strengthen the research and development of vapor phase antirust agents.

Method used

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  • Synthesis method of N, N-bi(piperidylmethyl)-cyclohexylamine

Examples

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Effect test

Embodiment 1

[0012] In a three-necked bottle equipped with a stirring device and a thermometer, add 25 grams of cyclohexylamine, then slowly add 92 grams of 37% formaldehyde solution, and stir for 25 minutes. Under stirring conditions, react at a temperature of 10 to 20 ° C for 0.5 hours. Generate N,N-dimethylolcyclohexylamine, then add 47 g of piperidine to the reaction solution, and react for 2 hours at a temperature of 25 to 30°C. After the reaction, the solution is left to stand, filtered, and the product is used Recrystallize from ethanol, filter with suction, and wash the recrystallized product twice with mother liquor to obtain N,N-bis(piperidylmethyl)-cyclohexylamine.

Embodiment 2

[0014] In a three-necked bottle equipped with a stirring device and a thermometer, add 28 grams of cyclohexylamine, then slowly add 92 grams of 37% formaldehyde solution, and stir for 15 minutes. Under stirring conditions, react at a temperature of 10 to 20 ° C for 1 hour. Generate N,N-dimethylolcyclohexylamine, then add 50 grams of piperidine to the reaction solution, and react for 1.5 hours at a temperature of 20 to 30°C. After the reaction is completed, the solution is left to stand, filtered, and the product is Recrystallize from ethanol, filter with suction, wash the recrystallized product 3 times with mother liquor to obtain N,N-bis(piperidylmethyl)-cyclohexylamine.

Embodiment 3

[0016] In a three-necked bottle equipped with a stirring device and a thermometer, add 30 grams of cyclohexylamine, then slowly add 122 grams of 37% formaldehyde solution, and stir for 30 minutes. Under stirring conditions, react at a temperature of 10-20°C for 1 hour. Generate N,N-dimethylolcyclohexylamine, then add 52 grams of piperidine to the reaction solution, and react for 1 hour at a temperature of 20 to 25°C. After the reaction, the solution is left to stand, filtered, and the product is used Recrystallize from ethanol, filter with suction, wash the recrystallized product 3 times with mother liquor to obtain N,N-bis(piperidylmethyl)-cyclohexylamine.

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Abstract

The invention discloses a synthesis method of N, N-bi(piperidylmethyl)-cyclohexylamine. The synthesis method comprises the steps of reacting cyclohexylamine and a formaldehyde solution to generate N, N-dihydroxymethylcyclohexylamine; adding piperidine into a reaction solution, and heating to carry out reflux reaction; after the reaction is ended, standing the solution, filtering, recrystallizing the product by using ethanol, carrying out suction filtration, and cleaning the recrystallized product 2-3 times by using a mother solution to prepare N, N-bi(piperidylmethyl)-cyclohexylamine. The synthesized product has a corrosion inhibiting effect, is mainly used for inhibiting cathode corrosion reaction and belongs to a multi-unit gaseous-phase cathode protection corrosion inhibitor.

Description

technical field [0001] The invention relates to the technical field of antirust additive synthesis, in particular to a synthesis method of N,N-di(piperidylmethyl)-cyclohexylamine. Background technique [0002] Compared with traditional anti-rust methods, gas-phase anti-rust materials have many incomparable advantages. After the metal material is packaged or sprayed, the molecules of the gas-phase corrosion inhibitor begin to diverge, and the molecules of the gas-phase corrosion inhibitor can penetrate into the traditional anti-rust The corner space that cannot be covered by oil has no dead corners in rust prevention; the effective components of gas-phase corrosion inhibitor molecules have a long retention time, and can achieve an anti-rust protection period of more than 10 years; even if there is moisture on the metal surface or the outside air is very humid, the anti-rust agent can A protective film is formed on the surface of the metal to prevent the metal from being corro...

Claims

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Application Information

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IPC IPC(8): C07D295/13
CPCC07D295/13
Inventor 修建东刘方旭
Owner 兴化市庆丰锌品有限公司
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