APPARATUS AND METHOD FOR PREPARING SOLID FORMS WITH CONTROLLED RELEASE OF THE ACTIVE INGREDIENT.

摘要

An improved apparatus and method for preparing solid forms with controlled release of the active ingredient according to the spray drying and spray congealing techniques. The improvement involves the use of an atomizer utilizing the mechanical vibrations of resonant metal elements or nozzles so as to obtain very small droplets with very short spray length (25-30 cm). These droplets fall to give spherical powder particles owing to the evaporation of the contained solvents or of the quenching solidification of the melted waxy components.