Powder formation by atmospheric spray-freeze drying

Details Powder formation by atmospheric spray-freeze drying Powder formation by atmospheric spray-freeze drying

B - Operations, Transporting

01

J

B01J 2/04 (2006.01) A61J 3/02 (2006.01) A61K 9/14 (2006.01) A61K 9/19 (2006.01) F26B 5/06 (2006.01)

Patent

CA 2450779

A method of manufacturing heat-sensitive pharmaceutical powder is disclosed. The original pharmaceutical substances are dissolved in a solution or suspended in a suspension, which is sprayed through an atomizing nozzle and frozen in a cold gas phase or liquid nitrogen atomized directly in the spray-freeze chamber or gas jacket at the same time (for cooling purposes). The particles are freeze-dried at roughly atmospheric pressure in a down-stream fluid flow with exit filter thereby to remove moisture entrapped on or inside the frozen particles. The system has applicability for forming other powders.

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