초록 ▼

Methods for preparing dry powders having hydrophobic and hydrophilic components comprise combining solutions of the components and spray drying them simultaneously in a spray dryer. The hydrophilic and hydrophobic component are separately dissolved in separate solvents and directed simultaneously th

Methods for preparing dry powders having hydrophobic and hydrophilic components comprise combining solutions of the components and spray drying them simultaneously in a spray dryer. The hydrophilic and hydrophobic component are separately dissolved in separate solvents and directed simultaneously through a nozzle, usually a coaxial nozzle, into the spray dryer. The method provides dry powders having relatively uniform characteristics.

대표청구항 ▼

[ What is claimed is:] [1.] A method for preparing a dry powder composition, said method comprising:preparing an aqueous solution of a hydrophilic component;preparing an organic solution of a hydrophobic component in an organic solvent; anddelivering the aqueous solution containing the hydrophilic c

[ What is claimed is:] [1.] A method for preparing a dry powder composition, said method comprising:preparing an aqueous solution of a hydrophilic component;preparing an organic solution of a hydrophobic component in an organic solvent; anddelivering the aqueous solution containing the hydrophilic component to an atomizer;delivering the organic solution containing the hydrophobic solution to the atomizer separately from the aqueous solution containing the hydrophilic solution;atomizing the two solutions together in the atomizer to produce droplets containing both solutions;spray drying the droplets of the aqueous solution and the organic solution to form dry particles comprising a mixture of the hydrophilic and hydrophobic component.