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Method for producing alkanolamine salt of a-sulfo fatty acid alkyl ester

A technology of sulfo fatty acid alkyl ester and manufacturing method, which is applied in the direction of sulfonate salt preparation, amino hydroxyl compound preparation, chemical instruments and methods, etc., can solve the problems such as easy coloring of α-sulfo fatty acid alkyl ester salt, Achieves the effect of suppressing color tone deterioration

Inactive Publication Date: 2012-04-11
LION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] α-sulfo fatty acid alkyl ester salts are prone to coloration when sulfonated or concentrated

Method used

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  • Method for producing alkanolamine salt of a-sulfo fatty acid alkyl ester
  • Method for producing alkanolamine salt of a-sulfo fatty acid alkyl ester
  • Method for producing alkanolamine salt of a-sulfo fatty acid alkyl ester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3-1～3-4

[0157] [Examples 3-1 to 3-4, Reference Example 3-5]

[0158] Put the methyl ester of fatty acid with a chain length of C14 (14 carbon atoms) (manufactured by Lion Co., Ltd., trade name: Pastel M-14) in a tank reactor, and flow it into the reaction solution by nitrogen in an open system. Blow into SO 3 gas, thereby sulfonating the respective methyl esters. The reaction temperature is 80°C, and the reaction molar ratio is SO 3 / methyl ester=1.2, SO 3 The supply rate is about 10g·min -1 . Thereafter, α-sulfofatty acid methyl esters were obtained by performing an aging reaction at 80° C. for 30 minutes. Then with respect to the obtained α-sulfo fatty acid methyl ester, add methanol 20wt%, H 2 o 2 SO 3 Esterification and bleaching of 2-molecule adducts. Add 0.5 mol / L monoethanolamine aqueous solution heated to 50° C. into bleaching acid, adjust the pH of the sample to 6.0, and obtain an aqueous solution containing α-sulfo fatty acid methyl ester monoethanolamine salt. The...

Embodiment 3-6～3-7

[0162] Using methyl ester of fatty acid with chain length C12 (manufactured by Lion Corporation, trade name: Pastel M-12) and methyl ester of fatty acid with chain length C18 (manufactured by Lion Corporation, trade name: Pastel M-180), carry out The same operation as in Example 3-4 was carried out to obtain an aqueous paste containing α-sulfo fatty acid methyl ester monoethanolamine salt. The results of its concentrated AI and hue determination are shown in Table 4.

[0163] [Table 4]

[0164]

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PUM

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Abstract

Disclosed is a method for producing an alkanolamine salt of an a-sulfo fatty acid alkyl ester, comprising: a step of sulfonating a fatty acid alkyl ester to obtain a sulfonated compound; a step of reacting an alcohol and hydrogen peroxide with the sulfonated compound to obtain a reaction product; a step of adding an aqueous alkanolamine solution to the reaction product to obtain a neutralized product having a pH of 2 to 6.5; and a step of concentrating the neutralized product to obtain an aqueous paste containing an alkanolamine salt of an a-sulfo fatty acid alkyl ester. Accordingly, the deterioration of color tone at the time of concentration when preparing an aqueous paste of an alkanolamine salt of an a-sulfo fatty acid alkyl ester can be prevented.

Description

technical field [0001] The present invention relates to the production method of α-sulfo fatty acid alkyl ester fatty alcohol amine salt. [0002] this application claims priority based on Japanese Patent Application No. 2009-095937 for which it applied to Japan on April 10, 2009, and uses the content here. Background technique [0003] An α-sulfo fatty acid alkyl ester salt among anionic surfactants is highly evaluated as a lotion material due to its excellent detergency, good biodegradability, etc. [0004] In the production of α-sulfo fatty acid alkyl ester salt, generally, after contacting the fatty acid alkyl ester with sulfonation gas, the sulfonated product obtained is passed through an aging process, an esterification process of adding a lower alcohol, etc., by using an aqueous alkali solution. Neutralize to obtain an aqueous paste of α-sulfo fatty acid alkyl ester salt. Usually, the above-mentioned aqueous paste is heated and concentrated in order to increase the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/32C07C215/08C07C309/17
CPCC07C213/08C07C303/32C07C215/08C07C309/17
Inventor 安藤秀男樱井美香子
Owner LION CORP
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