New process for preparing pharmaceutical, cosmetic or diagnostic

Details New process for preparing pharmaceutical, cosmetic or diagnostic New process for preparing pharmaceutical, cosmetic or diagnostic

1978-02-06

1979-12-18

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 13, F26B 506

Patent

active

041786955

ABSTRACT:
The process produces pharmaceutical, cosmetic or diagnostic formulations by the freeze drying of one or more substances in solution or in suspension in a solvent or a mixture of solvents. The solution or suspension is locally and progressively cooled in a controlled manner while agitating so as to produce microcrystals of solvent which are put in suspension in the remainder of the liquid until there is obtained a high-viscosity microcrystalline complex system comprising essentially isolated microcrystals of solvent in intimate mixture with interstitial liquid phases having a high concentration of the initially present substances. The microcrystalline complex system is hardened by cooling and lyophilized. This process permits the obtainment of lyophilized formulations having a higher dissolving or dispersing rate and lyophilized compositions of normally incompatible substances.

REFERENCES:
patent: 3309779 (1967-03-01), Ginnette et al.

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