| (19) |
 |
|
(11) |
EP 0 132 073 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
30.12.1986 Bulletin 1986/52 |
| (43) |
Date of publication A2: |
|
23.01.1985 Bulletin 1985/04 |
| (22) |
Date of filing: 29.06.1984 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB NL |
| (30) |
Priority: |
14.07.1983 JP 12699583
|
| (71) |
Applicant: Solex Research Corporation of Japan |
|
() |
|
| (72) |
Inventors: |
|
- Watanabe, Morio
()
- Nishimura, Sanji
()
|
|
| |
|
| (54) |
Process for producing metallic niobium or metallic tantalum |
(57) Metallic niobium or metallic tantalum is produced by a process which comprises bringing
a fluorine containing compound of niobium or tantalum:
(A) into contact with a gas comprising hydrogen at a temperature of at least 400°C;
or
(B) into contact with metallic aluminium, metallic magnesium or metallic lead, at
a temperature of at least 300°C;
to convert the fluorine containing compound into the corresponding metal.