Method for purification through sublimation

Details Method for purification through sublimation Method for purification through sublimation

2005-01-11

2005-01-11

Silverman, Stanley S. (Department: 1754)

Chemistry: physical processes

Physical processes

Sublimation

Reexamination Certificate

active

06840968

ABSTRACT:
A method for purification through sublimation includes a step of compressing a powdered object to be purified in a tight and compact manner such as granules or cakes under a preset pressure, temperature and time for containing a greater amount of substances in a unit volume so that the object to be purified has an improved heat transfer efficiency and heating power is more stable. During sublimation process a flowing inertia gas is channeled to carry the sublimated and purified substances so that the purified substance flow in the same direction for depositing.

REFERENCES:
patent: 4654048 (1987-03-01), Braun et al.
patent: 5173088 (1992-12-01), Maeda et al.

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