US3110561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of potassium sulfate
Assignee: Wintershall AG
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Filing: 1961-03-14
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Granted: 1963-11-12
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Expires: 1981-03-14
Abstract
No abstract record available.
Inventors
- 👤 Henne Hans
- 👤 Ratsch Kurt
- 👤 Budan Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:03
CPC Classifications
C; C01; C01D; C01D5/00; C01D5/06; C01D5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A CONTINUOUS PROCESS FOR PRODUCING POTASSIUM SULFATE WHICH COMPRISES (1) MIXING, IN AN AQUEOUS SOLUTION, POTASSIUM CHLORIDE AND POTASSIM NAGNESIUM DOUBLE SULFATE AND SEPARATING THE POTASSIUM SULFATE AND SULFATE LIQUOR RESULTING THEREFROM, (2) MIXING A MAJOR PORTION OF SAID SULFATE LIQUOR WITH MAGNESIUM SULFATE HAVING AT MOST ONE MOLE OF WATER OF CRYSTALLIZATION AT A TEMPREATURE OF ABOUT 50* TO 80* C. THEREBY FORMING POTASISUM MAGNESIUM DOUBLE SULFATE AND MOTHER LIQUOR, (3) MIXING THE REMAINING PORTION OF SAID SULFATE LIQUOR WITH SYNTHETIC FORMING POTASSIUM MAGNESIUM DOUBLE SULFATE AND MOTHER LIQUOR, (4) SEPARATING THE POTASIUM MAGNESIUM DOUBLE SULFATE FROM THE MOTHER LIQUORS AND RECYCLING THE POTAS-
Claim 2
Dependent Claim
105 words
A CONTINUOUS PROCESS FOR PRODUCING POTASSIUM SULFATE WHICH COMPRISES (1) MIXING, IN AN AQUEOUS SOLUTION, POTASSIUM CHLORIDE AND POTASSIM NAGNESIUM DOUBLE SULFATE AND SEPARATING THE POTASSIUM SULFATE AND SULFATE LIQUOR RESULTING THEREFROM, (2) MIXING A MAJOR PORTION OF SAID SULFATE LIQUOR WITH MAGNESIUM SULFATE HAVING AT MOST ONE MOLE OF WATER OF CRYSTALLIZATION AT A TEMPREATURE OF ABOUT 50* TO 80* C. THEREBY FORMING POTASISUM MAGNESIUM DOUBLE SULFATE AND MOTHER LIQUOR, (3) MIXING THE REMAINING PORTION OF SAID SULFATE LIQUOR WITH SYNTHETIC FORMING POTASSIUM MAGNESIUM DOUBLE SULFATE AND MOTHER LIQUOR, (4) SEPARATING THE POTASIUM MAGNESIUM DOUBLE SULFATE FROM THE MOTHER LIQUORS AND RECYCLING THE POTAS-
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) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |