Patent US2612435A successfully refreshed from Google Patents.
US2612435A
Expired / Lapsed
US
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Method for recovery of vanadiumfree chromate and aluminate
Assignee: Diamond Shamrock Corp
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Filing: 1948-11-13
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Granted: 1952-09-30
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Expires: 1968-11-13
Abstract
No abstract record available.
Inventors
- 👤 Tom S Perrin
- 👤 Robert G Banner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:13
CPC Classifications
C; C01; C01G; C01G31/00; C01F; C01F7/00; C01F7/02; C01F7/46; C01F7/47; C01F7/68; C01F7/74; C01G37/00; C01G37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE METHOD OF REMOVING AND RECOVERING VANADIUM AND ALUMINUM VALUES FROM AN ALKALINE SOLUTION HAVING A PH OF AT LEAST 10 COMPRISING THE SAME AS VANADATES AND ALUMINATES AND A PREPONDERANCE OF ALKALI METAL CHROMATES, WHICH INCLUDES THE STEPS OF CONTACTING SUCH SOLUTION WITH A LEAD COMPOUND WHICH PROVIDES A SOURCE OF LEAD IONS IN SAID SOLUTION, TO CO-PRECIPITATE SUBSTANTIALLY ALL OF THE VANDATE IONS AND AMINOR PROPORTION OF THE CHROMATE IONS AS THEIR LEAD SALTS, ADJUSTING THE ALKALINITY OF SAID SOLUTION TO A PH WITHIN THE RANGE OF 8-9 TO CONVERT SUBSTANTIALLY ALL OF SAID ALUMINUM VALUES TO ALUMINA HYDRATE, AND CO-PRECIPITATE SAID ALUMINA HYDRATE WITH SAID LEAD SALTS, AND SEPARATELY RECOVERING THE SUBSTANTIALLY VANADIUM AND ALUMINUM-FREE CHROMATE SOLUTION AND SAID CO-PRECIPITATE.
Claim 2
Independent Claim
123 words
THE METHOD OF REMOVING AND RECOVERING VANADIUM AND ALUMINUM VALUES FROM AN ALKALINE SOLUTION HAVING A PH OF AT LEAST 10 COMPRISING THE SAME AS VANADATES AND ALUMINATES AND A PREPONDERANCE OF ALKALI METAL CHROMATES, WHICH INCLUDES THE STEPS OF CONTACTING SUCH SOLUTION WITH A LEAD COMPOUND WHICH PROVIDES A SOURCE OF LEAD IONS IN SAID SOLUTION, TO CO-PRECIPITATE SUBSTANTIALLY ALL OF THE VANDATE IONS AND AMINOR PROPORTION OF THE CHROMATE IONS AS THEIR LEAD SALTS, ADJUSTING THE ALKALINITY OF SAID SOLUTION TO A PH WITHIN THE RANGE OF 8-9 TO CONVERT SUBSTANTIALLY ALL OF SAID ALUMINUM VALUES TO ALUMINA HYDRATE, AND CO-PRECIPITATE SAID ALUMINA HYDRATE WITH SAID LEAD SALTS, AND SEPARATELY RECOVERING THE SUBSTANTIALLY VANADIUM AND ALUMINUM-FREE CHROMATE SOLUTION AND SAID CO-PRECIPITATE.
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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |