US3119655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporative process for producing soda ash from trona
Assignee: FMC Corp
•
Filing: 1961-02-17
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Granted: 1964-01-28
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Expires: 1981-02-17
Abstract
No abstract record available.
Inventors
- 👤 William R Frint
- 👤 Allen P Mccue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:11
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/12; C01D7/126; C01D7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR PORDUCING SODA ASH FROM NATURAL TRONA WHICH COMPRISES CONTINUOUSLY DISSOLVING THE TRONA IN HEATED WATER, REMOVING THE INSOLUBLE MATTER, ADDING A SUBSTANTIALLY CRYSTAL FREE MOTHER LIQUID TO THE SOLUTION CONTAINING SUFFICIENT SODIUM CARBONATE TO BRING THE SOLUTION INTO THE RANGE WHERE SODIUM SESQUICARBONATE WILL PRECIPITATE THEREFROM, EVAPORATING WATER FROM THE SOLUTION TO PRODUCE A SLURRY OF SODIUM SESQUICARBONATE IN A MOTHER LIQUOR, RECOVERING THE SESQUICARBONATE CRYSTALS FROM THE MOTHER LIQUOR, CALCINING THE SESQUICARBONATE CRYSTALS TO SODA ASH, AND RECYCLING THE SUBSTANTIALLY CRYSTAL FREE MOTHER LIQUOR TO THE INSOLUBLE FREE, WATER SOLUTION OF TRONA FOR THE PRODUCTION OF SESQUICARBONATE CRYSTALS THEREFROM.
Claim 2
Dependent Claim
103 words
A PROCESS FOR PORDUCING SODA ASH FROM NATURAL TRONA WHICH COMPRISES CONTINUOUSLY DISSOLVING THE TRONA IN HEATED WATER, REMOVING THE INSOLUBLE MATTER, ADDING A SUBSTANTIALLY CRYSTAL FREE MOTHER LIQUID TO THE SOLUTION CONTAINING SUFFICIENT SODIUM CARBONATE TO BRING THE SOLUTION INTO THE RANGE WHERE SODIUM SESQUICARBONATE WILL PRECIPITATE THEREFROM, EVAPORATING WATER FROM THE SOLUTION TO PRODUCE A SLURRY OF SODIUM SESQUICARBONATE IN A MOTHER LIQUOR, RECOVERING THE SESQUICARBONATE CRYSTALS FROM THE MOTHER LIQUOR, CALCINING THE SESQUICARBONATE CRYSTALS TO SODA ASH, AND RECYCLING THE SUBSTANTIALLY CRYSTAL FREE MOTHER LIQUOR TO THE INSOLUBLE FREE, WATER SOLUTION OF TRONA FOR THE PRODUCTION OF SESQUICARBONATE CRYSTALS THEREFROM.
References Cited (Backward Citations)
US2798790A
Cited
US2954282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |