公开(公告)号：EP1160033A4

公开(公告)日：2004-05-12

申请号：EP00974955

申请日：2000-11-10

申请人： SAKAI CHEMICAL INDUSTRY CO

发明人： MIZUTANI HIDETO ,  YONEDA MINORU ,  SUGAYA TOSHIHIRO ,  URASUMI HIROYOSHI ,  HONDA CHIYO ,  NAKAO HIROSHI ,  HATANAKA TSUTOMU ,  OHGAMA SHINJI ,  FUKAI KIYOSHI ,  NAGANO KAZUHIKO ,  KUMISAKA SHIGEFUMI ,  ABE KAZUNOBU

IPC分类号： B22F9/26 ,  B22F9/22 ,  H01G4/008

CPC分类号： H01G4/008 ,  B22F9/22 ,  B22F2998/10 ,  B22F2999/00 ,  B22F9/026

摘要： A method for producing a fine powder of metallic nickel comprised of fine spherical particles having an average particle diameter of 0.05 to 10 νm characterized in that it comprises a first step of dissolving nickel carbonate and/or nickel hydroxide represented by Ni(CO3)x . (OH)y, wherein 0 ≤ x ≤ 1.5 and 0 ≤ y ≤ 3, in an aqueous ammonia solution, or an aqueous solution of ammonia and ammonium carbonate, ammonium hydrogen carbonate or a carbonate or hydrogen carbonate of an alkali metal to form an aqueous nickel solution, preparing a W/O type emulsion comprising a non-aqueous medium and droplets of the aqueous nickel solution, and removing volatile components form the droplets to precipitate nickel carbonate, thereby forming fine spherical particles of nickel carbonate, and a second step of heating the nickel carbonate particles under a hydrogen atmosphere in the presence of 0.01 to 30 wt % in terms of oxide of a fusion preventive agent comprising a compound of at least one element selected from among an alkaline earth element, aluminum, silicon and a rare earth element, thereby reducing the nickel carbonate particles.

公开(公告)号：EP1013610A4

公开(公告)日：2001-08-16

申请号：EP99921191

申请日：1999-05-19

申请人： SAKAI CHEMICAL INDUSTRY CO

发明人： NAGANO KAZUHIKO ,  ABE KAZUNOBU ,  KAMISAKA SHIGEFUMI ,  FUKAI KIYOSHI ,  HATANAKA TSUTOMA ,  OHGAMA SHINJI ,  NAKAO HIROSHI ,  YONEDA MINORU ,  MIZUTANI HIDETO

IPC分类号： B01J23/70 ,  B01J37/00 ,  B22F9/02 ,  C01B13/32 ,  C01G3/00 ,  C01G3/02 ,  C01G51/00 ,  C01G51/04 ,  C01G51/06 ,  C01G53/04 ,  C01G53/06 ,  C01G53/00

CPC分类号： C01G53/06 ,  B01J23/70 ,  B01J37/00 ,  B22F9/026 ,  C01B13/328 ,  C01G3/00 ,  C01G3/02 ,  C01G51/04 ,  C01G51/06 ,  C01G53/04 ,  C01P2002/02 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62

摘要： A method for producing fine spherical particles of a carbonate or a hydroxide of nickel, cobalt or copper which comprises dissolving a carbonate or a hydroxide of nickel, cobalt or copper represented by general formula (I): M(CO3)x/2 •(OH)y, wherein M represents Ni, Co or Cu, and x and y are numbers satisfying 0