Method for synthesizing fatty acyl amino acid surfactant by using direct method

A fatty acyl amino acid and surfactant technology, applied in the field of surfactant preparation, can solve the problems of insufficient green raw materials, "three wastes" discharge, low yield, etc., and achieve the advantages of improving application convenience, reducing use and emission, Ease of industrial production

Inactive Publication Date: 2020-04-14
ZHANGJIAGANG GREAT CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above research methods, except for the industrialized acid chloride method, basically have the problems of poor reaction selectivity and low reaction conversion rate, which lead to difficulties in separation and purification and low yields.
At present, the synthesis process of acyl amino acid salt by acyl chloride method is relatively mature, with good selectivity and high conversion rate, but there are also problems such as insufficient green raw materials, long process, and serious discharge of "three wastes" during the purification process, which limits its rapid development. development and application areas.

Method used

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  • Method for synthesizing fatty acyl amino acid surfactant by using direct method
  • Method for synthesizing fatty acyl amino acid surfactant by using direct method
  • Method for synthesizing fatty acyl amino acid surfactant by using direct method

Examples

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Effect test

Embodiment 1

[0053]The method for the direct synthesis of fatty acyl amino acid surfactant in this embodiment, the steps are as follows:

[0054] Add 0.1mol of coconut oil acid, 0.5mol of methylamine, and 0.12mol of sodium isethionate into the reactor, close the reactor, slowly raise the temperature to 210°C, keep the temperature for 4 hours, and distill off the unreacted methylamine. Add 0.05% hydrochloric acid of reactant weight, adjust the pH value at 6.5~7.5, granulate to obtain light yellow N-cocoyl-N-methyl taurate granules, N-cocoyl-N-methyl taurate The sodium acid content is 90.5%, and the coconut oil content is 2.1%.

Embodiment 2

[0056] The method for the direct synthesis of fatty acyl amino acid surfactant in this embodiment, the steps are as follows:

[0057] Add 0.14mol of cocoic acid, 3mol of methylamine, and 0.1mol of sodium isethionate into the reactor, seal the reactor, slowly raise the temperature to 150°C, keep the temperature for 3 hours, distill off the unreacted methylamine, add Reactant weight 0.1% taurine, adjust the pH value at 6.5 ~ 7.5, add water to adjust the mass percentage to 30%, to obtain light yellow N-cocoyl-N-methyl taurine sodium taurate solution, N- The content of sodium cocoyl-N-methyl taurine taurate is 26.4%, and the content of cocoic acid is 3.1%.

Embodiment 3

[0059] The method for the direct synthesis of fatty acyl amino acid surfactant in this embodiment, the steps are as follows:

[0060] Add 0.2 mol of caprylic acid, 1.0 mol of methylamine, and 0.10 mol of sodium isethionate into the reactor, seal the reactor, slowly raise the temperature to 150°C, keep the temperature for 4 hours, and distill off the unreacted methylamine. Add 0.05% hydrochloric acid of reactant weight, adjust pH value at 6.5~7.5, obtain light yellow N-octyl decanoyl-N-methyl taurate sodium, N-octyl decanoyl N-methyl taurate sodium content 95.6%, caprylic acid content 0.5%.

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Abstract

The invention discloses a method for synthesizing a fatty acyl amino acid surfactant by using a direct method. The method comprises the following steps: (1) adding fatty acid, methylamine and hydroxyethyl sulfonate into a reactor; (2) closing the reactor, and slowly heating to 150-300 DEG C; (3) carrying out a heat preservation reaction for 2-10 hours; (4) distilling to remove unreacted methylamine; and (5) treating to obtain a finished product. According to the invention, fatty acid, methylamine and sodium isethionate are selected to be subjected to a direct reaction, impurities such as chlorine ions and the like are not introduced in the process, and the target product is obtained through the direct reaction, so that the purification steps such as acidification, salification and the likeare omitted, and the use and discharge of salt-containing wastewater or an organic solvent are reduced; and the operation is convenient, the industrial production is easy to realize, the product formof the prepared product can also be changed according to actual requirements, and the cost advantage and the application convenience advantage of the product are improved.

Description

technical field [0001] The invention relates to a preparation method of a surfactant, in particular to a method for directly synthesizing a fatty acyl amino acid surfactant. Background technique [0002] Surfactant is a class of active materials that can significantly change all surface / interface properties. By changing the interface state of the system, it has the functions of wetting or anti-sticking, emulsification or demulsification, foaming or defoaming, and solubilization and dispersion. A series of physical and chemical effects and corresponding practical applications, such as washing, anti-corrosion, anti-static, etc., are widely used in all walks of life in the development of the national economy, and are known as "industrial monosodium glutamate". In the industrial transformation period when human beings are facing resource, energy, and water crisis, the sustainable development of surfactants is very important for the healthy development of surfactants themselves a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/32C07C309/15B01F17/24C09K23/24
CPCC07C303/32C09K23/00
Inventor 徐由江朱红军郭静波崔宜斌陈叶礼朱志乾臧涛涛
Owner ZHANGJIAGANG GREAT CHEM
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