公开(公告)号：EP0983227A1

公开(公告)日：2000-03-08

申请号：EP98922946.3

申请日：1998-05-22

申请人： NYCOMED IMAGING AS

发明人： THIELKING, William ,  INGVOLDSTAD, Einar, Odd ,  GULBRANDSEN, Trygve

IPC分类号： C07C231/12 ,  C07C231/22 ,  C07C237/46

CPC分类号： C07C231/12 ,  C07C237/46

摘要： The invention provides a process by which ultra low salt content triiodinated aromatic compounds may be isolated from a highly acidic hot triiodination raction medium in a straightforward fashion. The process involves increasing the pH to above 5 with sodium hydroxide, addition of sodium bisulphite and/or sodium dithionite, addition of seed crystals, cooling slowly, and washing the collected precipitate with water.