US3212848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing sodium carbonate
Assignee: Solvay SA
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Filing: 1963-01-21
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Granted: 1965-10-19
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Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Tasiaux Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:06
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/07; C01D7/35; C01D7/37
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A PROCESS FOR THE PRODUCTION OF DENSE SODIUM CARBONATE WHICH COMPRISES REACTING AN AQUEOUS SODIUM HYDROXIDE SOLUTION, LIGHT DENSITY SODIUM CARBONATE CONTAINING A SMALL AMOUNT SODIUM BICARBONATE, AND CRUDE SODIUM BICARBONATE CONTAINING AMMONIA IN SUFFICIENT PROPORTIONS IN CONVERT SUBSTANTIALLY ALL OF THE AQUEOUS SODIUM HYDROXIDE SOLUTION TO SODIUM CARBONATE MONOHYDRATE, AND SEPARATING THE REACTION PRODUCT FORMED CONSISTING, ESSENTIALLY OF SODIUM CARBONATE MONOHYDRATE CRYSTALS, AND THEREAFTER DRYING AND CALCINING THE SAID MONOHYDRATE TO PRODUCE SODIUM CARBONATE OF HIGHD ENSITY.
Claim 2
Dependent Claim
78 words
A PROCESS FOR THE PRODUCTION OF DENSE SODIUM CARBONATE WHICH COMPRISES REACTING AN AQUEOUS SODIUM HYDROXIDE SOLUTION, LIGHT DENSITY SODIUM CARBONATE CONTAINING A SMALL AMOUNT SODIUM BICARBONATE, AND CRUDE SODIUM BICARBONATE CONTAINING AMMONIA IN SUFFICIENT PROPORTIONS IN CONVERT SUBSTANTIALLY ALL OF THE AQUEOUS SODIUM HYDROXIDE SOLUTION TO SODIUM CARBONATE MONOHYDRATE, AND SEPARATING THE REACTION PRODUCT FORMED CONSISTING, ESSENTIALLY OF SODIUM CARBONATE MONOHYDRATE CRYSTALS, AND THEREAFTER DRYING AND CALCINING THE SAID MONOHYDRATE TO PRODUCE SODIUM CARBONATE OF HIGHD ENSITY.
Claim 3
Dependent Claim
59 words
A PROCES FOR THE PRODUCTION OF SODIUM CARBONATE MONOHYDRATE COMPRISING: (A) REACTING AN AQUEOUS SOLUTION OF SODIUM HYDROXIDE WITH AN EXCESS OF SODIUM BICARBONTE WHEREBY SUBSTANTIALLY ALL OF SAID SODIUM HYHDROXIDE IS CONVERTED TO SODIUM CARBONATE MONOHYDRATE; AND (B) REACTING THE SOLUTION OF (A) WITH ANHYDROUS SODIUM CARBONATE WHEREBY THE WATER OF SOLUTION IS CONVERTED TO SODIUM CARBONATE MONOHYDRATE.
Claim 4
Dependent Claim
59 words
A PROCES FOR THE PRODUCTION OF SODIUM CARBONATE MONOHYDRATE COMPRISING: (A) REACTING AN AQUEOUS SOLUTION OF SODIUM HYDROXIDE WITH AN EXCESS OF SODIUM BICARBONTE WHEREBY SUBSTANTIALLY ALL OF SAID SODIUM HYHDROXIDE IS CONVERTED TO SODIUM CARBONATE MONOHYDRATE; AND (B) REACTING THE SOLUTION OF (A) WITH ANHYDROUS SODIUM CARBONATE WHEREBY THE WATER OF SOLUTION IS CONVERTED TO SODIUM CARBONATE MONOHYDRATE.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |