Improved method for preparing sodium lauryl sulfate
A technology of sodium lauryl sulfate and sulfamic acid, which is applied in the preparation of sulfate esters, organic chemistry, etc., and can solve problems such as irritation, harm, and danger
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[0015] The preparation of embodiment 1, sodium lauryl sulfate, structural formula is as follows:
[0016]
[0017] Add 6.64g of raw material lauryl alcohol and 1.94g of sulfamic acid in a 100ml round bottom flask, and dissolve the raw materials under stirring conditions, and then add 1-butylpyridine bisulfate ([BPy]HSO 4 ) (structural formula is: ) 0.3884 g of acidic ionic liquid and 0.48 g of urea were used as catalysts, and stirred and reacted at 90° C. for 4 h. After the reaction was completed, it was treated with 30% NaOH solution to neutrality. After drying, it was washed with absolute ethanol and chloroform to obtain 3.69 g of pure white powder sodium lauryl sulfate, with an isolated yield of 64.0% and a melting point of 183 -185°C.
[0018] Identification of Sodium Lauryl Sulfate:
[0019] Infrared Spectrum IR(KBr)v / cm -1 : 2957, 2919, 2851, 1249, 1205, 830.
[0020] The product was identified to be consistent with the literature report.
Embodiment 2
[0022] Add 6.64g of raw material lauryl alcohol and 1.94g of sulfamic acid in a 100ml round bottom flask, and dissolve the raw materials under stirring conditions, and then add 1-butylpyridine bisulfate ([BPy]HSO 4 ) (structural formula is: ) 0.3884 g of acidic ionic liquid and 0.48 g of urea were used as catalysts, and stirred and reacted at 95° C. for 2 h. After the reaction was completed, it was treated with 30% NaOH solution to neutrality, and after drying, it was washed with absolute ethanol and chloroform to obtain 4.56 g of pure white powder sodium lauryl sulfate, with an isolated yield of 79.1% and a melting point of 183 -185°C.
[0023] The product was identified to be consistent with the literature report.
Embodiment 3
[0025] Add 6.64g of raw material lauryl alcohol and 1.94g of sulfamic acid in a 100ml round bottom flask, and dissolve the raw materials under stirring conditions, and then add 1-butylpyridine bisulfate ([BPy]HSO 4 ) (structural formula is: ) 0.3884 g of acidic ionic liquid and 0.48 g of urea were used as catalysts, and stirred and reacted at 100° C. for 4 h. After the reaction was completed, it was treated with 30% NaOH solution to neutrality, and after drying, it was washed with absolute ethanol and chloroform to obtain 5.30 g of pure white powder sodium lauryl sulfate, with an isolated yield of 91.9% and a melting point of 183 -185°C.
[0026] The product was identified to be consistent with the literature report.
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