公开(公告)号：EP1115653A4

公开(公告)日：2003-01-15

申请号：EP99927346

申请日：1999-06-08

申请人： CYPRUS AMAX MINERALS CO

发明人： KHAN MOHAMED H ,  COLE JAMES A ,  BRUHL TIMOTHY G ,  ELDER WENDELL S ,  GLASGOW GARY A ,  WAGH VIJAYKUMAR M

IPC分类号： C01G39/00 ,  C01B13/14 ,  B01J23/00 ,  C01F7/02

CPC分类号： C01G39/00

摘要： A novel isomer of ammonium octamolybdate ("AOM") and method for producing the same. A new AOM isomer ("X-AOM") is described which is characterized by a distinctive Raman spectral profile compared with other AOM isomers including and -AOM. To produce the novel isomer, ammonium dimolybdate ("ADM") (12) is combined with molybdenum trioxide (MoO3) (34) and water (14) to yield a mixture. When mixing these materials, optimum results are achieved if at least one of the foregoing molybdenum-containing reagents is added in a gradual, non-instantaneous manner so that the selected reagent is not added to the mixture in a single large mass. This gradual delivery procedure, along with a carefully controlled prolonged heating stage (e.g. in excess of 3 hours) contributes to a maximum yield of high purity X-AOM.