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US 9,169,123 B2Granted
Method for producing sodium chromite
AssigneeSumitomo Electric Industries, Ltd.
InventorsAtsushi Fukunaga, Shoichiro Sakai, Koji Nitta, Masatoshi Majima, Shinji Inazawa
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Abstract
According to this production method, the water content of a mixture of a chromium oxide (Cr2O3) powder and a sodium carbonate (Na2CO3) powder is brought to 1000 ppm or less, and the mixture is heated in an inert gas atmosphere at a calcination temperature (850 DEG C.) where the sodium carbonate and the chromium oxide undergo a calcination reaction. Sodium chromite is thereby obtained.
Claims11
A method for producing sodium chromite, the method comprising steps of:
- adjusting a water content of a mixture of a chromium oxide powder and a sodium carbonate powder to 1,000 ppm or less;
- and
- heating the mixture in an inert gas atmosphere at a calcination temperature where the sodium carbonate and the chromium oxide undergo a calcination reaction to produce the sodium chromite.
Dependencies are inferred from the claim text.