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Method for measuring fatty acid soap in amino acid surface active agent

A technology for surfactants and fatty acid soaps, which is applied in the field of determination of fatty acid soaps in amino acid surfactants, can solve the problems of inconvenient tracking and analysis, insufficient reproducibility, cumbersome operation, etc. short-term effect

Active Publication Date: 2014-07-09
SHANGHAI OLI ENTERPRISES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is cumbersome to operate, takes a long time, and the reproducibility is not good enough. It is quite inconvenient for daily production tracking analysis.

Method used

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  • Method for measuring fatty acid soap in amino acid surface active agent
  • Method for measuring fatty acid soap in amino acid surface active agent
  • Method for measuring fatty acid soap in amino acid surface active agent

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Acidification: Take 30g sample, put it in a separatory funnel, add distilled water and concentrated sulfuric acid, recommended to pH≤1. Add 75mL of xylene for extraction, and after the layers are separated, release the lower aqueous layer. Add 50 mL of distilled water, shake and wash, and release the water layer. Filter the xylene solution to 250mL with qualitative filter paper 24 # In a ground round bottom bottle. Evaporate in vacuo, vacuum dry the sample, and pour the sample into a clean jar.

[0023] Esterification: Weigh 2.5g of hexanoic acidified and constant weight synthetic product into a round bottom flask, add 80mL of methanol solution of p-toluenesulfonic acid, reflux on a water bath for 5h, pour it into the liquid separation after esterification In the funnel, wash the esterification flask with 100mL distilled water for 3 times, combine the 3 washes in the separatory funnel, and extract 3 times with 20mL petroleum ether, 10mL for the first time, 10.0mL for...

Embodiment 2

[0038] Acidification: Take 30g sample, put it in a separatory funnel, add distilled water and concentrated hydrochloric acid until pH≤1. Add 75mL of diethyl ether for extraction, and after the layers are separated, release the lower aqueous layer. Add 50 mL of distilled water, shake and wash, and release the water layer. Filter the ether solution to 250mL with qualitative filter paper 24 # In a ground round bottom bottle. Evaporate in vacuo, vacuum dry the sample, and pour the sample into a clean jar.

[0039] Esterification: Weigh 2g of hexanoic acid and constant weight synthetic product into a round bottom flask, add 80mL of methanol solution of p-toluenesulfonic acid, reflux on a water bath for 2h, and pour it into a separatory funnel after esterification Inside, wash the esterification flask with 100mL distilled water for 3 times, combine the 3 washes in a separatory funnel, extract 3 times with 20mL petroleum ether, 10mL for the first time, 10.0mL petroleum ether for t...

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Abstract

The invention relates to a method for measuring the fatty acid soap in an amino acid surface active agent, which comprises the following steps: acidizing the surface active agent; extracting converted organic acid by using an organic solvent; then carrying out esterification; and finally, measuring the content of ester by using a gas chromatograph through an internal standard method to obtain the content of the fatty acid soap. The method is simple, convenient and rapid and is suitable for trace analysis in chemical production.

Description

technical field [0001] The invention relates to a method for determining fatty acid soap content in amino acid surfactants. Through the method of the present invention, the content of the fatty acid soap in the intermediate of the amino acid surfactant and even the final product can be quickly analyzed, which is suitable for the central control analysis, tracking analysis and product analysis of chemical production. Background technique [0002] In recent years, due to the need for environmental protection and biological safety, the development and use of environmentally friendly surfactants have attracted increasing attention from all over the world. Amino acid surfactants are one of them and are very popular. It has good wettability, foaming properties, antibacterial properties, etc., is almost non-toxic and harmless, and is mild to the skin. Its degradation products are amino acids and fatty acids, so it has almost no impact on the environment. It has the advantages of g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/06
Inventor 江志洁方慧静蔡芳张扬
Owner SHANGHAI OLI ENTERPRISES CO LTD