High-purity spherical fatty acyl amino acid and preparation method thereof
A fatty acyl amino acid and high-purity technology, which is applied in the field of high-purity spherical fatty acyl amino acid and its preparation, can solve the problems of high liquid transportation cost, generation of dust, difficulty in use and the like, and achieves convenient dissolution and use, less impurities , the effect of small size
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Embodiment 1
[0029] A preparation method of high-purity spherical lauroyl sarcosine includes the following steps:
[0030] (1) Take a four-neck flask, add a 75% ethanol aqueous solution with a volume concentration of 75%, add sarcosine, control the temperature at 17°C, add liquid caustic soda (30wt% sodium hydroxide) dropwise to it, and adjust the pH between 9-12.5 , Control the temperature at 17℃±2, slowly add lauroyl chloride dropwise, while adding liquid caustic soda to control the pH in the range of 9-12.5, after the dropwise addition, continue to stir at 17°C for 30 minutes, the reaction is complete, and lauroyl sarcosinate is obtained; The molar ratio of sarcosine to lauroyl chloride is 1.2.
[0031] (2) Add hydrochloric acid to adjust the pH to 2-5 to obtain a clear and transparent lauroyl sarcosine solution.
[0032] (3) Put the 50g lauroyl sarcosine solution obtained in step (2) in a four-necked flask, stir, turn on the vacuum, heat up to 60°C, draw out the solvent, and use a metering p...
Embodiment 2
[0034] A preparation method of high-purity spherical cocoyl glutamic acid includes the following steps:
[0035] (1) Take a four-necked flask, add 75% acetone aqueous solution with a volume concentration of 75%, add glutamic acid, control the temperature at 17°C, add liquid caustic soda (30wt% sodium hydroxide) dropwise to it, and adjust the pH between 9-12.5 , Control the temperature at 17℃±2, slowly drip cocoyl chloride, drip liquid caustic so as to control the pH in the range of 9-12.5, continue to stir at 17℃ for 30min after the dripping is completed, the reaction is completed to obtain cocoyl glutamate ; The molar ratio of glutamic acid to cocoyl chloride is 1.6.
[0036] (2) Add hydrochloric acid to adjust the pH to 2-4 to obtain a clear and transparent cocoyl glutamic acid solution.
[0037] (3) Put the 50g cocoyl glutamic acid solution obtained in step (2) in a four-necked flask, stir, turn on the vacuum, heat up to 50°C, draw out the solvent, and use a metering pump to even...
Embodiment 3
[0039] A method for preparing high-purity spherical cocoylglycine includes the following steps:
[0040] (1) Take a four-neck flask, add 75% methyl ethyl ketone aqueous solution with volume concentration, add glycine, control the temperature at 17°C, add liquid caustic soda (30wt% potassium hydroxide) dropwise to it, adjust the pH between 9-12.5, Control the temperature at 17°C±2, slowly add cocoyl chloride dropwise, drop the liquid caustic soda to control the pH within the range of 9-12.5, continue to stir at 17°C for 30 minutes after the dropwise addition is complete, and the cocoyl glycinate is obtained after the reaction is completed; The molar ratio to cocoyl chloride was 1.8.
[0041] (2) Add hydrochloric acid to adjust the pH to 2-4 to obtain a clear and transparent cocoylglycine solution.
[0042] (3) Put the 50g cocoyl glycine solution obtained in step (2) in a four-necked flask, stir, turn on the vacuum, heat up to 70°C, draw out the solvent, and use a metering pump to eve...
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