Freeze drying apparatus and method

Details Freeze drying apparatus and method Freeze drying apparatus and method

2008-03-25

2008-03-25

Lu, Jiping (Department: 3749)

Drying and gas or vapor contact with solids

Apparatus

Vacuum

C034S073000, C034S076000

Reexamination Certificate

active

07347004

ABSTRACT:
A lyophilization apparatus includes a chamber and plural drying shelves arranged in vertically spaced apart relation. Each shelf has an inlet, outlet, and flow passageway therebetween. Plural sets of shelves are independently coupled to separate sources of circulating heat exchange fluid. In a preferred embodiment, every second shelf is fluidically coupled to a first inlet manifold and a first outlet manifold, and every other shelf is fluidically coupled to a second inlet manifold a second outlet manifold. The first inlet and outlet manifolds are fluidically coupled to a first circulating source of heat exchange fluid and the second inlet and outlet manifolds are fluidically coupled to a second circulating source of heat exchange fluid, whereby the temperature of each drying shelf can be controlled independently of a vertically adjacent one of the drying shelves. In a further aspect, a lyophilization process is also provided.

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