Sublimation purifying method and apparatus

Specialized metallurgical processes – compositions for use therei – Compositions – Loose particulate mixture containing metal particles

Reexamination Certificate

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C266S172000, C266S202000

Reexamination Certificate

active

06878183

ABSTRACT:
This invention relates to a method for sublimation refining which gives a high-purity product in high yield while preventing corrosion of the apparatus, contamination of the product and change in quality of the product and to an apparatus useful for the method. The apparatus of this invention for sublimation refining comprises a heat generating unit made of a material generating heat by electromagnetic induction, sublimating unit A and collecting units B and C, respectively independently controllable in temperature by electromagnetic induction heating and the inner surface or the inner tube of the sublimating or collecting unit is made of a material like metal and ceramic inert to sublimable substances. According to the method of this invention for sublimation refining, a sublimable substance is introduced to sublimating unit A, the sublimating unit is heated by electromagnetic induction thereby sublimating the sublimable substance, the sublimate is introduced to collecting unit B containing a zone controlled in temperature by electromagnetic induction heating and the object sublimable substance is collected.

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English language translation of JP 09103602 A, Apr. 22, 1997.*
Supplementary European Search Report dated Apr. 9, 2003.
International Search Report for PCT/JP01/02173 mailed on Jul. 3, 2001.
Translation of International Preliminary Examination Report mailed on Aug. 6, 2002.

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