US2881050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of potassium and magnesium sulfate double salts
Assignee: Vefkaufsgemeinschaft Deutscher Kaliwerke GmbH
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Filing: 1955-10-20
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Granted: 1959-04-07
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Expires: 1975-10-20
Abstract
No abstract record available.
Inventors
- 👤 Autenrieth Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:08
CPC Classifications
C; C01; C01F; C01F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A PROCESS FOR THE PRODUCTION OF DOUBLE SALTS OF ONE MOL POTASSIUM SULFATE AND ONE MOL MAGNESIUM SULFATE HAVING CHEMICALLY BOUND WATER WITH THE RECOVERY OF A DOUBLE SALT CONVERSION SOLUTION HAVING A HIGH MAGNESIUM CHLORIDES CONTENT, WHICH COMPRISES CONTACTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF UNHYDRATES MAGNESIUM SULFATE AND THE HYDRATED MAGNESIUM SULFATES WITH POTASSIUM CHLORIDE AT A TEMPERATURE BETWEEN ABOUT 30 AND 55* C. IN AN AQUEOUS MEDIUM TO THEREBY PRECIPITATE THE DOUBLE SULFATE, SAID CONTACT SOLUTION BEING PREPARED BY ADDITION OF SAID GROUP MEMBER AND POTASSIUM CHLORIDE IN SUCH QUANTITIES TO SAID GROUP MEDIUM THAT IN SAID CONTACT SOLUTION THERE RESULTS CONCENTRATIONS WHICH ARE ADJUSTED TO FORM AT A PREDETERMINED LOWER TEMPERATURE BETWEEN 20* AND 35* C. A SOLUTION IN A META-STABLE EQUILIBRIUM THEREAFTER COOLING THE CONTACT MIXTURE WHILE PRECIPITATING FURTHER QUANTITIES OF THE DOUBLE SULFATE, AT ABOUT SAID PREDETEMINED LOWER TEMPERATURE AND RECOVER ING THE DOUBLE SULFATE FORMED AND A MOTHER LIQUID CONTAINING AT LEAST 220 GRAMS AND UP TO 285 GRAMS OF MAGNESIUM CHLORIDE PER LITER,
Claim 2
Dependent Claim
173 words
A PROCESS FOR THE PRODUCTION OF DOUBLE SALTS OF ONE MOL POTASSIUM SULFATE AND ONE MOL MAGNESIUM SULFATE HAVING CHEMICALLY BOUND WATER WITH THE RECOVERY OF A DOUBLE SALT CONVERSION SOLUTION HAVING A HIGH MAGNESIUM CHLORIDES CONTENT, WHICH COMPRISES CONTACTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF UNHYDRATES MAGNESIUM SULFATE AND THE HYDRATED MAGNESIUM SULFATES WITH POTASSIUM CHLORIDE AT A TEMPERATURE BETWEEN ABOUT 30 AND 55* C. IN AN AQUEOUS MEDIUM TO THEREBY PRECIPITATE THE DOUBLE SULFATE, SAID CONTACT SOLUTION BEING PREPARED BY ADDITION OF SAID GROUP MEMBER AND POTASSIUM CHLORIDE IN SUCH QUANTITIES TO SAID GROUP MEDIUM THAT IN SAID CONTACT SOLUTION THERE RESULTS CONCENTRATIONS WHICH ARE ADJUSTED TO FORM AT A PREDETERMINED LOWER TEMPERATURE BETWEEN 20* AND 35* C. A SOLUTION IN A META-STABLE EQUILIBRIUM THEREAFTER COOLING THE CONTACT MIXTURE WHILE PRECIPITATING FURTHER QUANTITIES OF THE DOUBLE SULFATE, AT ABOUT SAID PREDETEMINED LOWER TEMPERATURE AND RECOVER ING THE DOUBLE SULFATE FORMED AND A MOTHER LIQUID CONTAINING AT LEAST 220 GRAMS AND UP TO 285 GRAMS OF MAGNESIUM CHLORIDE PER LITER,
References Cited (Backward Citations)
US2437182A
Cited
US2479001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |