Patent US3622301A successfully refreshed from Google Patents.
US3622301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of nickel containing material to remove molybdenum
Assignee: Viridian Inc Canada
•
Filing: 1970-01-09
•
Granted: 1971-11-23
•
Expires: 1990-01-09
Abstract
Abstract A process for treating molybdenum contaminated nickel, iron and sulfur containing mattes, intermediates and residues to remove the molybdenum. The material in finely divided form is mixed with alkali and water and pelletized. The pellets are then roasted in air to convert the molybdenum into soluble alkali molybdate which is then leached from pellets with water.
Inventors
- 👤 Ernest Mehl
- 👤 Bauke Weizenbach
- 👤 Paul Kawulka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:23
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2406; C22B23/00; C22B23/005; C22B3/00; C22B3/04; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
The process as claimed in claim 1 wherein up to 80 percent by weight of the quantity of alkali mixed with said material is mixed in a dry state and the balance of said alkali is dissolved in the water which is added to said mixture to encourage and promote the agglomeration of said mixture into pellets.
Claim 2
Dependent Claim
29 words
The process as claimed in claim 2 wherein said alkali is selected from the group comprising sodium hydroxide, sodium carbonate, sodium sulfide, potassium hydroxide, potassium carbonate and mixtures thereof.
Claim 3
Dependent Claim
22 words
The process as claimed in claim 1 wherein said pelletized mixture is roasted in air at a temperature of about 1400* F.
Claim 4
Dependent Claim
34 words
The process as claimed in claim 1 wherein said pelletized mixture is roasted in air at a temperature of about 1400* F. for a period of from about 30 minutes to about 120 minutes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |