US2847279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for obtaining iron-free aluminum compound from clays
Assignee: Individual
•
Filing: 1955-05-25
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Granted: 1958-08-12
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Expires: 1975-05-25
Abstract
No abstract record available.
Inventors
- 👤 Tucker Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:28
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/20; C01F7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE RECOVERY OF AN IRON-FREE ALUMINUM COMPOUND FROM A CLAY OR LIKE SILICATE MINERAL CONTAINING CHEMICALLY COMBINED IRON WHICH COMPRISES CONTACTING SAID MINEAL WITH A 0.1 TO 5 MOLAR AQUEOUS NITRIC ACID SOLUTION, DISSOLVING IRON AND ALUMINUM INTO SAID ACID SOLUTION, FILTERING OFF UNDISSOLVED SILICA, ADDING CALCIUM CHLORIDE TO SAID ACID SOLUTION IN SUFFICIENT AMOUNT TO SATURATE SAID ACID SOLUTION WITH SUCH CALCIUM CHLORIDE, EXTRACTING THE ITON FROM SAID ACID SOLUTION BY DISSOLVING THE IRON IN METHYL ISOBUTYL KETONE, AND RETAINING ALL OF THE ALUMINUM DISSLOVED IN THE NITRIC ACID SOLUTION.
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE RECOVERY OF AN IRON-FREE ALUMINUM COMPOUND FROM A CLAY OR LIKE SILICATE MINERAL CONTAINING CHEMICALLY COMBINED IRON WHICH COMPRISES CONTACTING SAID MINEAL WITH A 0.1 TO 5 MOLAR AQUEOUS NITRIC ACID SOLUTION, DISSOLVING IRON AND ALUMINUM INTO SAID ACID SOLUTION, FILTERING OFF UNDISSOLVED SILICA, ADDING CALCIUM CHLORIDE TO SAID ACID SOLUTION IN SUFFICIENT AMOUNT TO SATURATE SAID ACID SOLUTION WITH SUCH CALCIUM CHLORIDE, EXTRACTING THE ITON FROM SAID ACID SOLUTION BY DISSOLVING THE IRON IN METHYL ISOBUTYL KETONE, AND RETAINING ALL OF THE ALUMINUM DISSLOVED IN THE NITRIC ACID SOLUTION.
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |