Patent US5657412A successfully refreshed from Google Patents.
Patent US3057682A successfully refreshed from Google Patents.
US3057682A
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Process for recovery as zirconium oxysulfate zirconium values from salt baths
Assignee: Millennium Petrochemicals Inc
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Filing: 1960-07-15
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Granted: 1962-10-09
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Expires: 1980-07-15
Abstract
No abstract record available.
Inventors
- 👤 Irwin J Groce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:05
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR RECOVERING ZIRCONIUM VALUES FROM A PURGE OBTAINED IN A SALT BATH PURIFICATION SYSTEM FOR ZIRCONIUM TETRACHLORIDE AND CONTAINING ZIRCONIUM VALUES WHICH COMPRISES THE STEPS OF (1) TREATING SAID PURGE WITH AND EXCESS OF WATER AT ABOUT 10* TO ABOUT 30* C. TO FORM A SLURRY; (2) TREATING THE SLURRY RESULTING FROM STEP (1) WITH SULFURIC ACID AT ABOUT 10* TO 30* C. TO CONVERT THE ZIRCONIUM VALUES TO ZIRCONIUM OXYSULFATE, THE RATIO OF ZIRCONIUM TO SULFATE ION BEING ABOUT 2:1 TO ABOUT 2.8:1, (3) TREATING THE ACID SOLUTION WITH A BASE AT ABOUT 85* TO 95* C. TO OBTAIN A PH OF ABOUT 194 RO 1.6 AND PRECIPITATE THE ZIRCONIUM OXYSULFATE; AND (4) RECOVERING SAID ZIRCONIUM OXYSULFATE.
Claim 2
Dependent Claim
120 words
A PROCESS FOR RECOVERING ZIRCONIUM VALUES FROM A PURGE OBTAINED IN A SALT BATH PURIFICATION SYSTEM FOR ZIRCONIUM TETRACHLORIDE AND CONTAINING ZIRCONIUM VALUES WHICH COMPRISES THE STEPS OF (1) TREATING SAID PURGE WITH AND EXCESS OF WATER AT ABOUT 10* TO ABOUT 30* C. TO FORM A SLURRY; (2) TREATING THE SLURRY RESULTING FROM STEP (1) WITH SULFURIC ACID AT ABOUT 10* TO 30* C. TO CONVERT THE ZIRCONIUM VALUES TO ZIRCONIUM OXYSULFATE, THE RATIO OF ZIRCONIUM TO SULFATE ION BEING ABOUT 2:1 TO ABOUT 2.8:1, (3) TREATING THE ACID SOLUTION WITH A BASE AT ABOUT 85* TO 95* C. TO OBTAIN A PH OF ABOUT 194 RO 1.6 AND PRECIPITATE THE ZIRCONIUM OXYSULFATE; AND (4) RECOVERING SAID ZIRCONIUM OXYSULFATE.
References Cited (Backward Citations)
US1540425A
Cited
US2294431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |