Method for synthesizing methyl ricinoleate ethoxylate sulfonate

A technology of ethoxylates and ricinoleic acid is applied in the directions of sulfonate preparation, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of simple and safe synthesis process

Active Publication Date: 2017-04-26
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using ricinoleic acid methyl ester ethoxylate as raw material, under the action of catalyst, it can be directly sulfonated with sodium bisulfite to obtain a new type of anionic surfactant----ricinoleic

Method used

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  • Method for synthesizing methyl ricinoleate ethoxylate sulfonate
  • Method for synthesizing methyl ricinoleate ethoxylate sulfonate
  • Method for synthesizing methyl ricinoleate ethoxylate sulfonate

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 50g (0.051mol) ricinoleic acid methyl ester ethoxylate (average molecular weight 976, X average value is 10.9, Y average value is 4.2, iodine value is 26.1g / 100g), 100g deionized water, 100g isopropanol , 8g (0.077mol) of sodium bisulfite and 1.1g of azobisisobutyronitrile were added to a 500ml four-neck flask, heated to 80°C, and reacted for 6.5h. After the reaction, the water and isopropanol were removed by rotary evaporation, dissolved with excess absolute ethanol, unreacted sodium bisulfite and generated sodium sulfite were removed by hot filtration, and the ethanol was removed by rotary evaporation to obtain the product. The main indicators of the product are as follows: (1) the iodine value is 22.1g / 100g; (2) the mass fraction of ricinoleic acid methyl ester ethoxylate sodium sulfonate is 14.7%.

Embodiment 2

[0029] 30g (0.030mol) ricinoleic acid methyl ester ethoxylate (average molecular weight 976, X average value is 10.9, Y average value is 4.2, iodine value is 26.1g / 100g), 60g deionized water, 60g ethanol, 4.8 Add g (0.046mol) sodium bisulfite and 0.6g azobisisobutyronitrile into a 250ml four-neck flask (dissolve sodium bisulfite in deionized water before adding), heat to 78°C, and react for 6h. After the reaction, remove water and ethanol by rotary evaporation, dissolve with excess absolute ethanol, remove unreacted sodium bisulfite and generated sodium sulfite by hot filtration, and remove ethanol by rotary evaporation to obtain the product. The main indicators of the product are as follows: (1) the iodine value is 21.6g / 100g; (2) the mass fraction of ricinoleic acid methyl ester ethoxylate sodium sulfonate is 17.9%.

Embodiment 3

[0031] 30g (0.026mol) ricinoleic acid methyl ester ethoxylate (average molecular weight 1151, X average value is 13.2, Y average value is 5.9, iodine value is 22.5g / 100g), 55g deionized water, 55g methanol, 5.4 Add g (0.052mol) sodium bisulfite and 0.5g azobisisobutyronitrile into a 250ml four-neck flask, heat to 60°C, and react for 8h. After the reaction, remove water and methanol by rotary evaporation, dissolve with excess absolute ethanol, remove unreacted sodium bisulfite and generated sodium sulfite by hot filtration, and remove ethanol by rotary evaporation to obtain the product. The main indicators of the product are as follows: (1) the iodine value is 18.5g / 100g; (2) the mass fraction of ricinoleic acid methyl ester ethoxylate sodium sulfonate is 18.9%.

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Abstract

The invention relates to a method for synthesizing methyl ricinoleate ethoxylate sulfonate. The method comprises the steps of adding methyl ricinoleate ethoxylate, sodium bisulfite, a catalyst, deionized water and low carbon alcohol into a reactor, carrying out a reaction with violent stirring, carrying out distilling at reduced pressure after the reaction ends so as to remove water and the low carbon alcohol, carrying out dissolving by using excessive anhydrous ethanol so as to remove unreacted sodium bisulfite and produced sodium sulfite, and carrying out distilling at reduced pressure to remove ethanol, thereby obtaining the product, wherein the mole ratio of methyl ricinoleate ethoxylate to sodium bisulfite is 1: (1.5 to 2.5), the use level of the catalyst is 1.5% to 2.5% the mass of methyl ricinoleate ethoxylate, and the mass ratio of the low carbon alcohol to the deionized water to methyl ricinoleate ethoxylate is (0.9 to 3): (0.9 to 3): 1. The method has the advantages that the synthesis process is simple and safe, and waste acids and waste alkalis cannot be generated.

Description

technical field [0001] The present invention relates to a kind of preparation method of anionic surface active agent, relate in particular to a kind of synthetic method of ricinoleic acid methyl ester ethoxylate sulfonate. Background technique [0002] In recent years, as people pay more and more attention to environmental issues, the development of new green and multifunctional surfactants has attracted more and more attention. Methyl ricinoleate ethoxylate is a typical nonionic surfactant, which has the characteristics of low cost, easy biodegradation, good environmental compatibility and little skin irritation. Its molecular structure is quite special. Compared with ordinary fatty acid methyl ester ethoxylate, it has a structure similar to fatty alcohol polyoxyethylene ether on the branch chain. In addition, there is a carbon-carbon double bond in the molecule, so it is subject to widespread attention of the people. [0003] Ricinoleic acid methyl ester ethoxylate sulfo...

Claims

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Application Information

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IPC IPC(8): C07C303/32C07C309/17B01F17/08C09K23/08
CPCC07C303/32C09K23/00
Inventor 孙永强朱克华武华萍孙晋源张勇周婧洁梁慧斌丁莉荣
Owner CHINA RES INST OF DAILY CHEM IND
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