US3245755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of soda ash from trona with reduction of iron impurity
Assignee: Intermountain Research and Development Corp
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Filing: 1962-11-07
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Granted: 1966-04-12
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Expires: 1982-11-07
Abstract
No abstract record available.
Inventors
- 👤 Harold J Comer
- 👤 Alan B Gancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:16
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/22; C01D7/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS FOR THE PREPARATION OF SODA ASH HAVING AN IRON CONTENT OF LESS THAN 10 P.P.M. FROM CRUDE TRONA WHICH COMPRISES FORMING AN AQUEOUS SLUTION CONTAINING SODIUM CARBONATE FROM CRUDE TRONA, ADDING SUFFICIENT SOLUBLE SULFIDE TO THE AQUEUOUS SOLUTION CONTAINING SODIUM CARBONATE TO OBTAIN A CONCENTRATION OF 100 TO 1000 P.P.M. OF SULFIDE IN THE SAID AQUEOUS SOLUTIONS, CLARIFYING THE SAID AQUEOUS SOLUTION TO REMOVE INSOLUBLES THEREFROM, ACERATING THE CLARIFIED AQUEOUS SOLUTION CONTAINING SODIUM CARBONATE WITH AN OXYGEN CONTAINING GAS TO PRECIPITATE IRON THEREFROM, FILTERING THE AERATED SOLUTION, COOLING THE FILTERED SOLUTION TO CRYSTALLIZE SODIUM CARBONATE THEREFROM, SEPARATING THE SODIUM CARBONATE CRYSTALS FROM THE MOTHER LIQUOR AND CLACINING THE SODIUM CARBONATE CRYSTALS TO SODA ASH HAVING LESS THAN 10 P.P.M. OF IRON AND RECOVERING THE SODA ASH.
Claim 2
Dependent Claim
128 words
A PROCESS FOR THE PREPARATION OF SODA ASH HAVING AN IRON CONTENT OF LESS THAN 10 P.P.M. FROM CRUDE TRONA WHICH COMPRISES FORMING AN AQUEOUS SLUTION CONTAINING SODIUM CARBONATE FROM CRUDE TRONA, ADDING SUFFICIENT SOLUBLE SULFIDE TO THE AQUEUOUS SOLUTION CONTAINING SODIUM CARBONATE TO OBTAIN A CONCENTRATION OF 100 TO 1000 P.P.M. OF SULFIDE IN THE SAID AQUEOUS SOLUTIONS, CLARIFYING THE SAID AQUEOUS SOLUTION TO REMOVE INSOLUBLES THEREFROM, ACERATING THE CLARIFIED AQUEOUS SOLUTION CONTAINING SODIUM CARBONATE WITH AN OXYGEN CONTAINING GAS TO PRECIPITATE IRON THEREFROM, FILTERING THE AERATED SOLUTION, COOLING THE FILTERED SOLUTION TO CRYSTALLIZE SODIUM CARBONATE THEREFROM, SEPARATING THE SODIUM CARBONATE CRYSTALS FROM THE MOTHER LIQUOR AND CLACINING THE SODIUM CARBONATE CRYSTALS TO SODA ASH HAVING LESS THAN 10 P.P.M. OF IRON AND RECOVERING THE SODA ASH.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |