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Method for synthesizing amide type gemini quaternary ammonium salt surfactant

A technology of gemini quaternary ammonium salt and surfactant, which is applied in the field of synthesis of amide type gemini quaternary ammonium salt surfactant, can solve the problems of poor durability of corrosion inhibition film, high use concentration, and inability to take into account, and achieve simple and easy reaction , high surface activity and excellent corrosion inhibition performance

Inactive Publication Date: 2018-07-06
CIVIL AVIATION UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional single-chain quaternary ammonium salt corrosion inhibitors have many applications in corrosion protection, but the corrosion inhibition effect is not good, and there are problems such as high concentration and poor durability of the formed corrosion inhibition film.
At present, imidazoline and quaternary ammonium salt corrosion inhibitors, which account for the main share in the market, generally have the problem of incompatibility between anti-corrosion performance and zero pollution discharge.

Method used

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  • Method for synthesizing amide type gemini quaternary ammonium salt surfactant
  • Method for synthesizing amide type gemini quaternary ammonium salt surfactant
  • Method for synthesizing amide type gemini quaternary ammonium salt surfactant

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Embodiment 1

[0018] The synthetic method of the amide type gemini quaternary ammonium salt surfactant provided by the present embodiment comprises the following steps carried out in order:

[0019] 1) Preparation of intermediate: add 50ml of dichloromethane into a beaker, dissolve 11.3g of chloroacetyl chloride in dichloromethane, take 3.7g of 1,3-propanediamine, and mix it in every 5 Slowly drip into the beaker at a rate of one drop per second. After the dropwise addition is complete, raise the temperature and react in a water bath at 35°C for 4 hours, and then evaporate under reduced pressure with a rotary evaporator in a water bath at 60°C for 1 hour to remove the solvent and excess chlorine. Acetyl chloride, the residue was dissolved in water, filtered, and then recrystallized once with absolute ethanol to obtain 4.7 g of an intermediate, namely 1,3-bis(2-chloroacetamide)propylamine.

[0020] 2) Synthesis of amide-type gemini quaternary ammonium salt surfactant: 4.7 g of 1,3-bis(2-chlo...

Embodiment 2

[0022] The synthetic method of the amide type gemini quaternary ammonium salt surfactant provided by the present embodiment comprises the following steps carried out in order:

[0023] 1) Preparation of intermediate: add 50ml of dichloromethane into a beaker, dissolve 14.1g of chloroacetyl chloride in dichloromethane, take 3.7g of 1,3-propanediamine, and mix in ice bath and stirring at every 5 Slowly drip into the beaker at a rate of one drop per second. After the dropwise addition is completed, raise the temperature and react in a water bath at 35°C for 5 hours, and then use a rotary evaporator in a water bath at 60°C for 1.5 hours to remove the solvent and excess chlorine. Acetyl chloride, the residue was dissolved in water, filtered, and then recrystallized once with absolute ethanol to obtain 4.9 g of an intermediate, namely 1,3-bis(2-chloroacetamide)propylamine.

[0024] 2) Synthesis of amide-type gemini quaternary ammonium salt surfactant: 4.9 g of 1,3-bis(2-chloramide) ...

Embodiment 3

[0026] The synthetic method of the amide type gemini quaternary ammonium salt surfactant provided by the present embodiment comprises the following steps carried out in order:

[0027] 1) Preparation of intermediate: add 50ml of dichloromethane into a beaker, dissolve 17.0g of chloroacetyl chloride in dichloromethane, take 3.7g of 1,3-propanediamine, and mix it in every 5 Slowly drip into the beaker at a rate of one drop per second. After the dropwise addition is completed, raise the temperature and react in a water bath at 35°C for 6 hours, then evaporate under reduced pressure with a rotary evaporator in a water bath at 60°C for 2 hours to remove the solvent and excess chlorine. Acetyl chloride, the residue was dissolved in water, filtered, and then recrystallized once with absolute ethanol to obtain 5.0 g of an intermediate, namely 1,3-bis(2-chloroacetamide)propylamine.

[0028] 2) Synthesis of amide type gemini quaternary ammonium salt surfactant: 5.0 g of 1,3-bis(2-chloro...

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Abstract

The invention provides a method for synthesizing an amide type gemini quaternary ammonium salt surfactant. The method comprises the following steps: under anhydrous conditions, firstly reacting 1,3-propanediamine and chloroacetyl chloride to synthesize an intermediate with bisamide groups and dichloro atoms; then reacting the intermediate and dodecyl dimethylamine, and synthesizing the final product belonging to quaternary ammonium salt Gemini surfactants. According to the method, the target product is synthesized by two steps, reactions are simple and feasible, and the product has the advantages of being high in surface activity, excellent in water solubility, small in irritation and degradable. The final product can be applied to an aluminum alloy corrosion inhibition system for aviation. Experiments prove that the corrosion inhibition property of the final product is better than that of the traditional single-chain quaternary ammonium salt corrosion inhibitor.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, in particular to a synthesis method of an amide-type gemini quaternary ammonium salt surfactant. technical background [0002] Gemini surfactants are a new generation of surfactants that connect two traditional single-head group single-alkane chain surfactants at the ionic head group with a linking group through chemical bonds. In recent years, with the development of chemical technology and the needs of the economy, traditional surfactants have been unable to meet people's needs due to many limitations in their own structures. Compared with traditional surfactants, gemini surfactants have many advantages such as high surface activity, good water solubility and rheological properties, so they have a wide range of industrial production and commercial application prospects. With the rise of the green revolution, people's awareness of environmental protection has gradually increased, and the...

Claims

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Application Information

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IPC IPC(8): C07C231/12C07C237/10C23F11/14
CPCC07C231/02C07C231/12C23F11/145C07C237/10C07C233/36
Inventor 杜娟杨凡贾帅刘青茂
Owner CIVIL AVIATION UNIV OF CHINA
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