Method of preparing bismuth oxide and apparatus therefor

Details Method of preparing bismuth oxide and apparatus therefor Method of preparing bismuth oxide and apparatus therefor

2011-05-03

2011-05-03

Bos, Steven (Department: 1736)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group va metal or arsenic

C423S617000, C422S186220, C422S209000, C266S200000, C266S217000, C266S225000, C266S235000, C266S239000

Reexamination Certificate

active

07935321

ABSTRACT:
A method of preparing bismuth oxide and an apparatus therefor are disclosed. The method includes: melting bismuth metal; transporting the melted bismuth metal to an open first reactor and oxidizing the melted bismuth metal while stirring at a temperature of 300-650° C.; and transporting bismuth oxide and un-reacted material to a closed second reactor through a screw and oxidizing the bismuth oxide and un-reacted material while rotating the closed second reactor at a temperature of 300-600° C. with a supply of air or oxygen.

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