A kind of preparation method of pharmaceutical excipient
A technology for pharmaceutical excipients and polyvinyl alcohol, which is applied in pharmaceutical formulations, medical preparations with inactive ingredients, sugar-coated pills, etc., can solve the problems of water solubility, poor fluidity, poor fluidity of intermediates, and water-soluble intermediates. To solve problems such as poor performance, the formula is simple and easy to implement, the variety of raw materials is small, and the coating effect is good.
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Embodiment 1
[0026] A preparation method of pharmaceutical excipients, comprising the steps of:
[0027] Add 2 tons of medical deionized water to the kettle, heat up to 90°C, add 375kg of PVA (0588), the weight average molecular weight is 27000, the viscosity of 10wt% polyvinyl alcohol aqueous solution at 20°C is 5mpa.s, and the degree of alcoholysis is 88 %, stir for 3-5h until fully dissolved, add 125kg PEG6000, the weight average molecular weight is 6000, stir until fully dissolved, replenish 600kg of water, adjust the pH value to 7 with solid sodium hydroxide, and the mass ratio of PVA to PEG is 3:1.
[0028] In the 300-type centrifugal spray drying tower, the spray drying temperature is 120°C, the air inlet temperature is 140°C, the air outlet temperature is 80°C, the spray drying pressure is -400Pa, and the powdery finished pharmaceutical excipients are dried with a mesh size of 60- 70 mesh.
Embodiment 2
[0030] A preparation method of pharmaceutical excipients, as described in Example 1, the difference is: PEG6000 is replaced by PEG4000 with a weight average molecular weight of 4000, and other steps are consistent with Example 1.
[0031] This embodiment can also obtain qualified finished products, but the powder is easy to agglomerate.
Embodiment 3
[0033] A preparation method of pharmaceutical excipients, as described in Example 1, the difference is: PVA (0588) is replaced by PVA (1788), the weight average molecular weight is 84000, and the viscosity of 10wt% polyvinyl alcohol aqueous solution at 20 ° C is 26mpa .s, alcoholysis degree is 88%, other steps are consistent with embodiment 1.
[0034] What the present embodiment obtains is free-flowing powder, obtains qualified product.
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