公开(公告)号：EP1071687A4

公开(公告)日：2003-01-08

申请号：EP99915091

申请日：1999-03-30

申请人： RHODIA RARE EARTHS INC

发明人： YUNLU KENAN ,  HE MIN ,  CUIF JEAN-PIERRE ,  ALAS MICHEL

IPC分类号： B01J31/04 ,  C07C51/41 ,  C07C53/128 ,  C07F5/00 ,  C08F4/52 ,  C08F36/00 ,  C08F36/04 ,  B01J31/00

CPC分类号： B01J31/223 ,  B01J31/04 ,  B01J2231/122 ,  B01J2531/38 ,  C08F36/04 ,  C08F4/545

摘要： Stable Rare Earth carboxylate liquids having high concentrations of Rare Earths and suitable for use in forming active Ziegler Natta catalysts, are prepared with stabilizing agents such as water and/or acid. The liquids comprise from about 4.5 % to about 20 % Rare Earth element(s). A novel process for making is disclosed.