Preparation method of amino acid surfactant

A technology for surfactants and amino acids, which is applied in the preparation of carboxylic acid amides, the preparation of organic compounds, chemical instruments and methods, etc. It can solve problems such as high content of fatty acids and fatty acid salts, increased separation operation procedures, and unstable product indicators. , to achieve the effect of reducing the formation of fatty acids and fatty acid salts, shortening the reaction time, and solving the instability of product indicators

Pending Publication Date: 2022-04-22
广州花语精细化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The hydrolysis of acyl chloride will result in low material conversion rate, high content of fatty acid and fatty acid salt in the product, easy to appear turbidity, unstable product index and other problems, which will affect the product quality and increase the subsequent separation operation process

Method used

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  • Preparation method of amino acid surfactant
  • Preparation method of amino acid surfactant
  • Preparation method of amino acid surfactant

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The preparation method of amino acid surfactant in the present embodiment comprises the following steps: add alanine 93.45g, PEG400 1g, deionized water 620g in four-neck flask, start stirring, add the sodium hydroxide solution that solute mass fraction is 32% 94g, so that the alkaline pH value of the reaction solution reaches 12, after the temperature of the cooling reaction solution reaches 20°C, slowly add 218.5g of cocoyl chloride and 168.5g of sodium hydroxide solution with a mass fraction of solute of 32%, and adjust appropriately in the reaction process Add the amount of sodium hydroxide so that the pH value of the reaction solution is between 11-12, and the temperature is kept at 20-30°C for the reaction. The dropwise addition time is 2-3h. After the dropwise addition, continue to keep the reaction for 0.5h. complete.

[0027] The total mass of all other raw materials except PEG400 in this example is 1194.45g.

Embodiment 2

[0029] The preparation method of this example is basically the same as that of Example 1, except that the amount of PEG400 added in this example is 2 g.

Embodiment 3

[0031] The preparation method of this example is basically the same as that of Example 1, except that the amount of PEG400 added in this example is 5 g.

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Abstract

The invention provides a preparation method of an amino acid surfactant, and relates to the field of fine chemical engineering. The preparation method of the amino acid surfactant provided by the invention comprises the following steps: mixing water, amino acid and polyethylene glycol, adding alkali liquor to adjust the pH value of a mixed system to 8-13, adjusting the temperature of the mixed system to 10-60 DEG C, adding acyl chloride and alkali liquor into the mixed system, maintaining the pH value of the mixed system in a range of 8-13, and reacting for 2-4 hours to obtain the amino acid surfactant. And reacting to obtain the N-acylamino acid surfactant. According to the invention, polyethylene glycol is introduced into a reaction system on the basis of preparing the N-acylamino acid surfactant through a Shore-Baumann condensation reaction at present, so that the contact surface between acyl chloride and amino acid can be increased, the conversion rate of acyl chloride can be increased, the reaction time can be shortened, and the hydrolysis reaction of materials can be reduced; generation of fatty acid and fatty acid salt is effectively reduced, and the problems of unstable product indexes, turbidity and the like are solved.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a preparation method of an amino acid surfactant. Background technique [0002] In recent years, people have increasingly stringent requirements on the safety, mildness, functionality and environmental protection of surfactants. Multifunctional, environmentally friendly green surfactants are the main development direction of the surfactant industry. N-acyl-aminoacidssurfactants (N-acyl-aminoacidssurfactants, NAAs) are more popular green surfactants in recent years. It is a surfactant based on biomass. In addition to the basic properties of the active agent such as washing, foaming, penetration, emulsification, dispersion and solubilization, it also has good antibacterial effect, good biocompatibility, low irritation, low toxicity, mildness, corrosion inhibition and rust prevention Non-toxic, safe and rapid biodegradation, and good affinity to human skin, so it is widely used in co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C233/47C07C231/02C09K23/42
CPCC07C231/02C07C233/47
Inventor 王定培张涌刘振华陈胜环胡文杰
Owner 广州花语精细化工有限公司
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