The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2015
Filed:
Sep. 26, 2011
Applicants:
Atsushi Fukunaga, Osaka, JP;
Shoichiro Sakai, Osaka, JP;
Koji Nitta, Osaka, JP;
Masatoshi Majima, Osaka, JP;
Shinji Inazawa, Osaka, JP;
Inventors:
Atsushi Fukunaga, Osaka, JP;
Shoichiro Sakai, Osaka, JP;
Koji Nitta, Osaka, JP;
Masatoshi Majima, Osaka, JP;
Shinji Inazawa, Osaka, JP;
Assignee:
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01D 1/02 (2006.01); C01G 37/14 (2006.01); C01G 37/00 (2006.01);
U.S. Cl.
CPC ...
C01D 1/02 (2013.01); C01G 37/00 (2013.01); C01G 37/14 (2013.01); C01P 2002/72 (2013.01);
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.