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Machine translation
1. (WO2003072503) METHOD OF PURIFYING NIOBIUM COMPOUND AND/OR TANTALUM COMPOUND
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2003/072503    International Application No.:    PCT/JP2003/002224
Publication Date: 04.09.2003 International Filing Date: 27.02.2003
Chapter 2 Demand Filed:    23.06.2003    
IPC:
C01G 33/00 (2006.01), C01G 35/00 (2006.01), C01G 35/02 (2006.01), C22B 3/44 (2006.01), C22B 34/20 (2006.01), C22B 34/24 (2006.01)
Applicants: STELLA CHEMIFA KABUSHIKI KAISHA [JP/JP]; 6-3, Awajimachi 3-chome, Chuo-ku, Osaka-shi, Osaka 541-0047 (JP) (For All Designated States Except US).
KIKUYAMA, Hirohisa [JP/JP]; (JP) (For US Only).
WAKI, Masahide [JP/JP]; (JP) (For US Only).
IZUMI, Hirohito [JP/JP]; (JP) (For US Only).
YAZAKI, Hirofumi [JP/JP]; (JP) (For US Only).
AOKI, Kenji [JP/JP]; (JP) (For US Only).
HASHIGUCHI, Shinji [JP/JP]; (JP) (For US Only).
KAWAWAKI, Rie [JP/JP]; (JP) (For US Only).
MURAKAMI, Yuko [JP/JP]; (JP) (For US Only)
Inventors: KIKUYAMA, Hirohisa; (JP).
WAKI, Masahide; (JP).
IZUMI, Hirohito; (JP).
YAZAKI, Hirofumi; (JP).
AOKI, Kenji; (JP).
HASHIGUCHI, Shinji; (JP).
KAWAWAKI, Rie; (JP).
MURAKAMI, Yuko; (JP)
Agent: FUKUMORI, Hisao; 2F, Fuji Building, 5-11, Kudanminami 4-chome, Chiyoda-ku, Tokyo 102-0074 (JP)
Priority Data:
2002/52411 27.02.2002 JP
Title (EN) METHOD OF PURIFYING NIOBIUM COMPOUND AND/OR TANTALUM COMPOUND
(FR) PROCÉDÉ DE PURIFICATION D'UN COMPOSÉ DE NIOBIUM ET/OU DE TANTALE
Abstract: front page image
(EN)A method of purifying a niobium compound and/or tantalum compound, characterized by crystallizing the niobium compound and/or tantalum compound from a solution thereof. In the purification method, examples of the niobium compound and/or tantalum compound include niobium oxides and/or tantalum oxides. Examples of the solvent include hydrofluoric acid, especially one having a water content of 80 wt.% or lower. Thus, a niobium compound and/or tantalum compound can be easily purified at low cost.
(FR)L'invention concerne un procédé de purification d'un composé de niobium et/ou de tantale qui consiste à faire cristalliser le composé de niobium et/ou de tantale contenu dans une solution. Dans ce procédé de purification, des exemples de composés de niobium et/ou de tantale comportent des oxydes de niobium et/ou des oxydes de tantale. Des exemples du solvant comprennent de l'acide fluorhydrique, en particulier de l'acide fluorhydrique dont la teneur en eau est de 80 % maximum. L'invention permet ainsi de purifier à faible coût un composé de niobium et/ou de tantale.
Designated States: BR, CN, JP, KR, US.
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, SE, SI, SK, TR).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)