Benidipine hydrochloride nanoparticle and preparation method thereof
A technology of benidipine hydrochloride and benidipine hydrochloride, applied in the field of medicine, can solve the problems of large energy and time, wide crystal particle size distribution, etc.
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Embodiment 1
[0031] Add 10 mL of benidipine hydrochloride primary crystals to 10 mL of absolute ethanol, heat to reflux to dissolve, cool down in an ice bath, crystallize with 150W ultrasound for 10 min, and filter with suction to obtain pale yellow crystals. The crystal size is shown in Figure 1.
Embodiment 2
[0033] Add 10 mL of methanol to 10.1 g of primary crystals of benidipine hydrochloride, heat to reflux to dissolve, cool down in an ice bath, crystallize with 150 W ultrasound for 10 min, and suction filter to obtain light yellow crystals.
Embodiment 3
[0035] Add 10.2g of benidipine hydrochloride primary crystals, add 12mL of absolute ethanol, heat to reflux to dissolve, add 12mL of water, cool down in an ice bath, 150W ultrasonic, continue ultrasonication for 2min after crystallization.
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