US3254946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of potash solutions including pre-carbonation
Assignee: Dynamit Nobel AG
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Filing: 1964-11-17
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Granted: 1966-06-07
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Expires: 1984-11-17
Abstract
No abstract record available.
Inventors
- 👤 Karl W Hass
- 👤 Bleh Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:08
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE METHOD FOR PRODUCING POTASH BY CARBONATION OF A POTASSIUM HYDROXIDE SOLUTION WITH CARBON DIOXIDE, WHICH COMPRISES IN A FIRST STEP PASSING A CO2-CONTAINING GAS INTO A FIRST ADSORPTION ZONE IN COUNTERFLOW CONTACT WITH A PRE-CARBONATED KOH SOLUTION, WITHDRAWING THE REACTION SOLUTION FROM SAID FIRST ABSORPTION ZONE, MIXING A MAJOR AMOUNT OF THE KOH SOLUTION AND RE-INTRODUCING SAID LATTER RESULTING INTO THE FIRST ABSORPTION ZONE FOR FURTHER COUNTERFLOW CONTACT WITH CO2-CONTAINING GAS, PASSING THE REMAINING PORTION OF SAID WITHDRAWN REACTION SOLUTION INTO A SECOND ABSORPTION ZONE FOR COUNTERFLOW CONTACT WITH A CO2-CONTAINING GAS THEREIN, SAID CO2 BEING PRESENT IN SAID LATTER GAS IN AN AMOUNT AT LEAST EQUAL TO THAT REQUIRED TO COMPLETE THE CARBONATION AND RECOVERING THE POTASSIUM CARBONATE SOLUTION THEREBY PRODUCED.
Claim 2
Independent Claim
123 words
THE METHOD FOR PRODUCING POTASH BY CARBONATION OF A POTASSIUM HYDROXIDE SOLUTION WITH CARBON DIOXIDE, WHICH COMPRISES IN A FIRST STEP PASSING A CO2-CONTAINING GAS INTO A FIRST ADSORPTION ZONE IN COUNTERFLOW CONTACT WITH A PRE-CARBONATED KOH SOLUTION, WITHDRAWING THE REACTION SOLUTION FROM SAID FIRST ABSORPTION ZONE, MIXING A MAJOR AMOUNT OF THE KOH SOLUTION AND RE-INTRODUCING SAID LATTER RESULTING INTO THE FIRST ABSORPTION ZONE FOR FURTHER COUNTERFLOW CONTACT WITH CO2-CONTAINING GAS, PASSING THE REMAINING PORTION OF SAID WITHDRAWN REACTION SOLUTION INTO A SECOND ABSORPTION ZONE FOR COUNTERFLOW CONTACT WITH A CO2-CONTAINING GAS THEREIN, SAID CO2 BEING PRESENT IN SAID LATTER GAS IN AN AMOUNT AT LEAST EQUAL TO THAT REQUIRED TO COMPLETE THE CARBONATION AND RECOVERING THE POTASSIUM CARBONATE SOLUTION THEREBY PRODUCED.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |