Preparation method of amphoteric surfactant containing plurality of polar heads

A surfactant and polar head technology, applied in the preparation of sulfonate, organic chemistry, etc., can solve the problems of inability to obtain surfactant compounds, low atom utilization rate, and by-products, and achieve easy separation and purification, overcome Low atom utilization and no by-product effects

Inactive Publication Date: 2017-11-07
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

[0003] However, the common methods for synthesizing surfactants cannot obtain surface-active compounds with multiple polar heads in the molecule through a simple reaction.
Or limited by actual conditions,

Method used

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  • Preparation method of amphoteric surfactant containing plurality of polar heads

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Embodiment Construction

[0014] 1. Preparation of sodium 1-propyl-amine diethylsulfonate

[0015] Step 1: In a 100mL three-necked flask, mix 3.6g (0.05mol) of n-butyraldehyde, 4.8g (0.05mol) of methanesulfonic acid and 5.05g (0.0525mol) of sodium n-butoxide, add 50mL of n-butanol, and stir magnetically . Reflux to separate water until no more water is produced, cool to room temperature, and filter with suction, the yield is 100%.

[0016] Step 2: In a 100mL three-necked flask, dissolve the sodium β-propylethylene sulfonate and 7.92g (0.06mol) taurine sulfonic acid in 30mL water, stir magnetically, and add sodium hydroxide to adjust the pH to 9 ~10, react at 80°C for 4 hours, cool to room temperature, add an equal volume of ethanol and stir for 1 hour, and filter with suction to obtain the crude product of 1-propyl-amine diethanesulfonate, which can be recrystallized from 95% ethanol to obtain the pure product , yield 70%.

[0017] 2. Preparation of sodium 1-pentyl-amine diethanesulfonate

[0018] ...

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Abstract

This invention discloses a synthetic method of an amphoteric surfactant 1-(substituent)-amine diethanesulfonate (hereinafter the same) containing multiple polar heads. This invention comprises the following steps: the first step, using n-butanol as solvent and water-carrying agent, sodium n-butoxide as reaction reagent, mixing aldehydes, ketones and methanesulfonic acid with Rx group to prepare β- Sodium Rx ethylene sulfonate; the second step, water is used as a solvent, and sodium hydroxide is used as a reagent to mix β-Rx sodium ethylene sulfonate and aminoethanesulfonic acid to prepare 1-(substituent) of the formula II structure ‑Amine diethylsulfonate sodium. This invention realizes high utilization and low-cost preparation of 1-(substituent)-amine diethanesulfonate by improving conditions such as solvent, temperature, and pH.

Description

Technical field: [0001] This invention relates to a method for synthesizing an amphoteric surfactant containing multiple polar heads: 1-(substituting group)-amine diethanesulfonate sodium. Background technique: [0002] Synthesizing both unsaturated double bonds and anion-cation zwitterionic surface-active compounds is a very meaningful and challenging subject. These compounds have very important functions and applications in textiles, washing, petroleum, medicine and organic synthesis intermediates. In the molecular structure of surface active compounds, there are both anion and cationic centers, which can effectively improve the solubility, salt resistance, and antibacterial properties of surfactants; the molecules contain unsaturated bond active functional groups, which can be used as a new type of Gemini with higher activity. Surface-active intermediates. [0003] However, the common method for synthesizing surfactants cannot obtain the surface-active compounds of mult...

Claims

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Application Information

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IPC IPC(8): C07C303/32C07C309/14
CPCC07C303/32
Inventor 程玉桥杨光牛春荣张贤松梁书芹薛莉娜杜婷婷余恒
Owner TIANJIN POLYTECHNIC UNIV
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