The synthetic method of ricinoleic acid methyl ester ethoxylate sulfonate

A technology of ethoxylate and methyl ricinoleate, which is applied in the field of preparation of anionic surfactants, and achieves the effect of simple and safe synthesis process

Active Publication Date: 2018-04-27
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 acid methyl ester ethoxylate sulfonate Sodium bisulfite is added to the carbon-carbon double bond in the molecule. The preparation method of this kind of surfactant has not been reported at home and abroad.

Method used

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  • The synthetic method of ricinoleic acid methyl ester ethoxylate sulfonate
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  • The synthetic method of ricinoleic acid methyl ester ethoxylate sulfonate

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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

A kind of synthetic method of methyl ricinoleic acid ethoxylate sulfonate is that methyl ricinoleic acid ethoxylate, sodium bisulfite, catalyzer, deionized water, low-carbon alcohol are added in the reactor, strongly Under stirring, reaction, wherein the mol ratio of ricinoleic acid methyl ethoxylate and sodium bisulfite is 1:1.5-2.5; The consumption of catalyst is 1.5-2.5% of ricinoleic acid ethoxylate quality, Low-carbon alcohol, the mass ratio of deionized water and ricinoleic acid methyl ester ethoxylate is 0.9-3:0.9-3:1, after the reaction finishes, decompression distillation removes water and low-carbon alcohol, uses excessive anhydrous Ethanol was dissolved, unreacted sodium bisulfite and generated sodium sulfite were removed, and ethanol was distilled off under reduced pressure to obtain the product. The invention has the advantages of simple and safe synthesis process and no waste acid and alkali.

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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Patent Type & Authority Patents(China)
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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