Title:
【発明の名称】硝酸第二セリウムアンモニウムの製造法
Document Type and Number:
Japanese Patent JP2844368
Kind Code:
B2
Abstract:
PURPOSE:To increase work efficiency as well as to obtain a higher yield as compared with the conventional method by restricting the concn. and amt. of nitric acid and the amt. of ammonium nitrate in a reaction system at the time of charging starting materials. CONSTITUTION:When cerium oxide, cerium oxide hydrate or cerium hydroxide is dissolved in nitric acid and ammonium nitrate is added to the resulting soln. to produce ceric ammonium nitrate, nitric acid is used so that the concn. of nitric acid in a reaction system is regulated to >=50wt.% at the time of charging starting materials and the molar ratio of nitric acid to cerium and that of ammonium nitrate to cerium are regulated to >=4 and >=1.5, respectively.
Inventors:
KIMURA KAZUO
IKEDA YOICHI
IKEDA YOICHI
Application Number:
JP29198389A
Publication Date:
January 06, 1999
Filing Date:
November 08, 1989
Export Citation:
Assignee:
SUMITOMO KAGAKU KOGYO KK
SUMITOMO SEIYAKU KK
SUMITOMO SEIYAKU KK
International Classes:
C01C1/18; C01F17/00; (IPC1-7): C01C1/18; C01F17/00
Attorney, Agent or Firm:
Mitsuhiro Moroishi (1 person outside)