| Patent Number |
DE60022442 D1 2005-10-13 |
|
Processing route for direct production of mixed rare earth metal oxides by selective extraction
|
The process of the present invention comprises extracting praseodymium, neodymium, and optional cerium from a first aqueous solution comprising chlorides or sulfates of light rare earth into an organic solution; and separating product praseodymium, neodymium, and optional cerium from the organic solution by stripping the praseodymium, neodymium, and optional cerium into a second aqueous solution, followed by precipitation from the second aqueous solution, or by precipitating the praseodymium, neodymium, and optional cerium directly from the organic solution.The process is particularly advantageous because it allows efficient production of a mixture of rare earth suitable for use for permanent magnets that is less expensive and more readily available than the presently used pure neodymium.The extractant is selected from neodecanoic ("versatec") acids, naphthenic acids and organophosphorous compounds including i.a. 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (EHEHPA) and tributylphosphate (TBP).
|
©Questel
|
|
| FamPat family |
| Publication Number |
Type |
Publi.Date |
Links |
 |
EP1071828 |
A1 |
2001-01-31 |
  |
|
STG: |
(A1) Application published with search report |
|
AP: |
2000EP-0905917 |
| |
EP1071828 |
B1 |
2005-09-07 |
|
|
STG: |
(B1) Patent specification |
|
AP: |
2000EP-0905917 |
| PCT |
WO00/47785 |
A1 |
2000-08-17 |
|
|
STG: |
(A1) Published application with search report |
|
AP: |
2000WO-US02648 |
| PCT |
WO00/47785 |
A9 |
2001-10-25 |
|
|
STG: |
(A9) Complete corrected document |
|
AP: |
2000WO-US02648 |
 |
DE60022442 |
D1 |
2005-10-13 |
|
|
STG: |
(D1) Grant (no unexamined application published) patent law 81 |
|
AP: |
2000DE-6022442 |
| |
DE60022442 |
T2 |
2006-06-29 |
|
|
STG: |
(T2) Trans. of EP patent |
|
AP: |
2000DE-6022442 |
 |
JP2002536550 |
A |
2002-10-29 |
|
|
STG: |
(A) Published application |
|
AP: |
2000JP-0598678 |
 |
AU2751400 |
A |
2000-08-29 |
|
|
STG: |
(A) Open to public inspection |
|
AP: |
2000AU-0027514 |
 |
CN1263164 |
A |
2000-08-16 |
|
|
STG: |
(A) Published application |
|
AP: |
1999CN-0102208 |
| |
CN1131326 |
C |
2003-12-17 |
|
|
STG: |
(C) Granted patent for invention |
|
AP: |
1999CN-0102208 |
|
| First Date of Grant |
2005-09-07 |
|
2005-10-13 |
|
2003-12-17 |
| Inventor |
BAO DING SHAN
KU HAO XIAN
YAN BAI
ZHEN NI DE
BENZ MARK GILBERT
SHEI JULIANA C
DOYLE FIONA M |
| All applicant/assignee |
Baotou Iron And Steel (Group) Co., Ltd. ([CN])
GENERAL ELECTRIC COMPANY ([US])
Baotou Iron And Steel (Group) Co., Ltd. ([CN])
GENERAL ELECTRIC COMPANY ([US]) |
|
BAOTOU IRON AND STEEL (GROUP) CO., LTD. ([CN])
GENERAL ELECTRIC COMPANY ([US])
BAOTOU IRON AND STEEL (GROUP) CO., LTD.
GENERAL ELECTRIC COMPANY |
|
BAOTOU IRON AND STEEL (GROUP) CO., LTD.
GENERAL ELECTRIC CO., SCHENECTADY
Baotou Iron And Steel (Group) Co. ([CN])
General Electric Co. ([US]) |
|
BAOTOU IRON AND STEEL (GROUP) CO., LTD.
GENERAL ELECTRIC COMPANY |
|
GENERAL ELECTRIC CO.
BAOTOU IRON & STEEL (GROUP) CO., LTD.
BAOTOU IRON & STEEL (GROUP) CO., LTD.
GENERAL ELECTRIC CO. |
| Priority Details |
1999CN-0102208 1999-02-122000WO-US02648 2000-02-02 |
| Designated States |
Contracting States: DE GB NL |
|
National States: AL AM AT AU AZ BA BB BG BR BY CA CH CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW
ARIPO: GH GM KE LS MW SD SL SZ TZ UG ZW
EAPO: AM AZ BY KG KZ MD RU TJ TM
EPO: AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE
OAPI: BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
| |
|
©Questel
|