US3351423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing molybdic oxide from molybdate solutions
Assignee: Kennecott Corp
•
Filing: 1963-12-09
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Granted: 1967-11-07
•
Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 Stuart R Zimmerley
- 👤 Martin E Messner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:40
CPC Classifications
C; C01; C01G; C01G39/00; C01G39/02; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR PRODUCING MOLYBDIC OXIDE FROM MOLYBDATE SOLUTIONS, COMPRISING THE STEPS OF ADDING A MINERAL ACID TO SUCH A SOLUTION IN QUANTITY SUFFICIENT TO ADJUST ITS PH FAR ENOUGH BELOW 3.5 TO REMAIN BELOW 3.5 WHEN A REDUCING AGENT FOR MOLYBDENUM IS ADDED; INTRODUCING INTO THE SO-ADJUSTED SOLUTION A REDUCING AGENT FOR MOLYBDENUM WHICH IS STRONGER, IN AN ACID SOLUTION, THAN PLUS-THREE-VALENCE MOLYBDENUM, IN ORDER TO REDUCE THE MOLYBDENUM IONS TO THE PLUS THREE VALENCE STATE; THEREAFTER ADDING TO THE SOLUTION A BASIC MATERIAL IN QUANTITY SUFFICIENT TO RAISE THE PH TO PRECIPITATE MOLYBDENUM HYDROXIDE; SEPARATING THE PRECIPITATED MOLYBDENUM HYDROXIDE FROM THE SPENT SOLUTION WHILE MAINTAINING THE PH OF THE SOLUTION AT AT LEAST 3.5 BUT UNDER ABOUT 6.5; AND DRYING AND ROASTING THE MOLYBDENUM HYDROXIDE TO PRODUCE MOLYBDIC OXIDE.
Claim 2
Dependent Claim
131 words
A PROCESS FOR PRODUCING MOLYBDIC OXIDE FROM MOLYBDATE SOLUTIONS, COMPRISING THE STEPS OF ADDING A MINERAL ACID TO SUCH A SOLUTION IN QUANTITY SUFFICIENT TO ADJUST ITS PH FAR ENOUGH BELOW 3.5 TO REMAIN BELOW 3.5 WHEN A REDUCING AGENT FOR MOLYBDENUM IS ADDED; INTRODUCING INTO THE SO-ADJUSTED SOLUTION A REDUCING AGENT FOR MOLYBDENUM WHICH IS STRONGER, IN AN ACID SOLUTION, THAN PLUS-THREE-VALENCE MOLYBDENUM, IN ORDER TO REDUCE THE MOLYBDENUM IONS TO THE PLUS THREE VALENCE STATE; THEREAFTER ADDING TO THE SOLUTION A BASIC MATERIAL IN QUANTITY SUFFICIENT TO RAISE THE PH TO PRECIPITATE MOLYBDENUM HYDROXIDE; SEPARATING THE PRECIPITATED MOLYBDENUM HYDROXIDE FROM THE SPENT SOLUTION WHILE MAINTAINING THE PH OF THE SOLUTION AT AT LEAST 3.5 BUT UNDER ABOUT 6.5; AND DRYING AND ROASTING THE MOLYBDENUM HYDROXIDE TO PRODUCE MOLYBDIC OXIDE.
References Cited (Backward Citations)
US2017557A
Cited
US2965447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |