US3084026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing soda ash from crude trona
Assignee: FMC Corp
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Filing: 1960-05-26
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Granted: 1963-04-02
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Expires: 1980-05-26
Abstract
No abstract record available.
Inventors
- 👤 William R Frint
- 👤 William D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:49
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/12; C01D7/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A CYCLICAL SYSTEM OF PRODUCING SODA ASH FROM CRUDE TRONA THE PROCESS WHICH COMPRISES DISSOLVING CRUDE TRONA CONTAINING INSOLUBLE MATERIAL THEREIN IN A HEATED RECYCLING MOTHER LIQUOR, CLARIFYING THE CRUDE TRONA SOLUTION BY ADDING A FLOCCULATING AGENT FOR THE INSOLUBLE MATERIAL THEREIN IN AN AMOUNT FROM 0.5 TO 5 P.P.M., WHICH FLOCCULATING AGENT IS INCOMPATIBLE WITH THE CRYSTALLIZATION PROMOTER LATER USED IN SAID METHOD, AND SETTLING AND REMOVING THE INSOLUBLE MATERIAL AND SUBSTANTIALLY COMPLETELY REMOVING THE FLOCCULATING AGENT WITH THE INSOLUBLE MATERIAL, ADDING A CRYSTALLIZATION PROMOTER TO THE HOT TRONA SOLUTION AND COOLING TO CRYSTALLIZE SODIUM SESQUICARBONATE CRYSTALS THEREFROM, SEPARATING THE SESQUICARBONATE CRYSTALS FROM THE TRONA MOTHER LIQUOR, CALCINING THE SESQUICARBONATE CRYSTALS TO SODA ASH, RECYCLING AND REHEATING THE MOTHER LIQUOR AND DISSOLVING MORE CRUDE TRONA THEREIN AND REMOVING THE RESIDUAL CRYSTALLIZATION PROMOTER FROM THE CRUDE TRONA SOLUTION WITH THE INSOLUBLE MATERIAL.
Claim 2
Dependent Claim
143 words
IN A CYCLICAL SYSTEM OF PRODUCING SODA ASH FROM CRUDE TRONA THE PROCESS WHICH COMPRISES DISSOLVING CRUDE TRONA CONTAINING INSOLUBLE MATERIAL THEREIN IN A HEATED RECYCLING MOTHER LIQUOR, CLARIFYING THE CRUDE TRONA SOLUTION BY ADDING A FLOCCULATING AGENT FOR THE INSOLUBLE MATERIAL THEREIN IN AN AMOUNT FROM 0.5 TO 5 P.P.M., WHICH FLOCCULATING AGENT IS INCOMPATIBLE WITH THE CRYSTALLIZATION PROMOTER LATER USED IN SAID METHOD, AND SETTLING AND REMOVING THE INSOLUBLE MATERIAL AND SUBSTANTIALLY COMPLETELY REMOVING THE FLOCCULATING AGENT WITH THE INSOLUBLE MATERIAL, ADDING A CRYSTALLIZATION PROMOTER TO THE HOT TRONA SOLUTION AND COOLING TO CRYSTALLIZE SODIUM SESQUICARBONATE CRYSTALS THEREFROM, SEPARATING THE SESQUICARBONATE CRYSTALS FROM THE TRONA MOTHER LIQUOR, CALCINING THE SESQUICARBONATE CRYSTALS TO SODA ASH, RECYCLING AND REHEATING THE MOTHER LIQUOR AND DISSOLVING MORE CRUDE TRONA THEREIN AND REMOVING THE RESIDUAL CRYSTALLIZATION PROMOTER FROM THE CRUDE TRONA SOLUTION WITH THE INSOLUBLE MATERIAL.
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |