Synthesis method of surfactant

A surfactant and synthesis method technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of insufficient green raw materials, "three wastes" discharge, low yield, etc., and improve the convenience of application Advantages, reduced use and emissions, and ease of industrial production

Pending Publication Date: 2020-04-14
ZHANGJIAGANG GREAT CHEM
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  • Abstract
  • Description
  • Claims
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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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  • Synthesis method of surfactant
  • Synthesis method of surfactant
  • Synthesis method of surfactant

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Effect test

Embodiment 1

[0041] The synthetic method of the surfactant of the present embodiment is as follows:

[0042] Add 0.1 mol of tetradecyl alcohol, 0.15 mol of alanine ethyl ester, 0.05 mol of alanine methyl ester, and 0.02 g of manganese acetate into the reactor, close the reactor, slowly heat up to 210°C, and keep warm for 4 hours, connect to vacuum, vacuum degree -0.08~-0.09MPa, degas for 2 hours, adjust the pH value at 6.5~7.5, filter to obtain a light yellow solid product, and the conversion rate of lauryl alcohol is 81.4%.

Embodiment 2

[0044] The synthetic method of the surfactant of the present embodiment is as follows:

[0045] Add 0.1 mol of dodecyl alcohol, 0.14 mol of ethyl alanine, 0.03 g of manganese acetate, and 0.01 g of ferric oxide into the reactor, seal the reactor, slowly raise the temperature to 260°C, keep it warm for 3 hours, and insert Vacuum, vacuum degree -0.08~-0.09MPa, degas for 2 hours, adjust the pH value at 6.5~7.5, add water to adjust the solid content to 30.5%, filter to obtain a light yellow transparent liquid product, the conversion rate of lauryl alcohol is 91.2%.

Embodiment 3

[0047] The synthetic method of the surfactant of the present embodiment is as follows:

[0048]0.1mol lauryl alcohol, 0.1mol tetradecyl alcohol, 0.08mol methyl alanine, 0.1mol ethyl alanine, 0.025 gram of manganese acetate are added to the reactor, the reactor is closed, and the temperature is slowly raised to 200°C, heat preservation reaction for 6 hours, connect to vacuum, vacuum degree -0.08~-0.09MPa, degas for 2 hours, adjust the pH value at 6.5~7.5, filter to obtain a light yellow solid product, and the conversion rate of fatty alcohol is 91.1%.

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Abstract

The invention discloses a synthetic method of a surfactant. The synthetic method comprises the following steps: (1) adding fatty alcohol, a catalyst and amino acid ester into a reactor; (2) closing the reactor, and slowly heating to 200-300 DEG C; (3) carrying out a heat preservation reaction for 2-10 hours; (4) degassing; and (5) treating to obtain a finished product. According to the invention,fatty alcohol is directly selected as an acylation reagent to perform a reaction, so that the step of fatty acid acylation is omitted, the selection of dangerous substance acylation reagents such as phosgene, thionyl chloride, trichloromethyl chloroformate, phosphorus trichloride, phosphorus pentachloride and phosphorus oxychloride is reduced, the emission of byproducts such as phosphorous acid and the like is reduced, and the method is feasible from the aspect of reaction mechanism; and fatty alcohol and amino acid ester are selected to be subjected to a direct reaction, so that 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 as to eliminate the steps of acidification, salification or waterwashing desalination and reduce the use and discharge of salt-containing wastewater or an organic solvent.

Description

technical field [0001] The invention belongs to the technical field of preparation of daily chemicals, in particular to a method for synthesizing surfactants, in particular to a method for directly synthesizing fatty acyl amino acid surfactants. 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 i...

Claims

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Application Information

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IPC IPC(8): C07C231/10C07C233/47B01F17/22B01F17/28C09K23/22C09K23/28
CPCC07C231/10C09K23/00
Inventor 崔宜斌徐由江朱红军郭静波陈叶礼朱志乾臧涛涛
Owner ZHANGJIAGANG GREAT CHEM
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