Preparation method and application of stachydrine ionic liquid
The technology of ionic liquid and stachydine is applied in the field of preparation of stachydrine organic acid ionic liquid, which can solve the problems of difficult separation of precipitated salts, easy water separation of stachydrine, etc., and achieves good extraction effect and transdermal absorption effect. Good, high-purity effect
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Embodiment 1
[0028] Weigh 0.10mol stachydrine hydrochloride and 0.15mol salicylic acid and dissolve them in 100mL of distilled water respectively, then pass the stachydrine hydrochloride solution through a chromatographic column equipped with 800g pretreated strong basic anion exchange resin to make the solution Pass through the chromatography column at a flow rate of 20m / h. The passed solution was mixed with the salicylic acid solution, and the mixed solution was vacuum-dried at 0.1 mPa and 60°C for 48 hours to finally obtain the stachydrine-salicylic acid ionic liquid [Sta][Sal].
Embodiment 2
[0030] Weigh 0.10mol stachydrine hydrochloride and 0.10mol rhododendronic acid and dissolve them in 100mL distilled water acetonitrile respectively, then pass the stachydrine hydrochloride solution through the chromatographic column of 100g pretreated strong basic anion exchange resin to make The solution was passed through the chromatography column at a flow rate of 15 m / h. The passed solution was mixed with the rhododendronic acid solution, and the mixed solution was evaporated to dryness at 60° C. until the weight did not change, and finally the stachydrine-rhodododric acid ionic liquid [Sta][Aze] was obtained.
Embodiment 3
[0032] Weigh 0.10mol stachydrine hydrochloride and 0.30mol acetic acid and dissolve them in 100mL ethanol respectively, then pass the stachydrine hydrochloride solution through the chromatographic column of 350g pretreated strong basic anion exchange resin, and make the solution dilute at 10mL / h flow through the column. The passed solution was mixed with acetic acid solution, and the mixed solution was rotary evaporated at 30° C. until no condensate was produced, and stachydrine-acetic acid ionic liquid [Sta][Ace] was finally obtained.
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