US3103413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium cakbonate manufacture
Assignee: —
•
Filing: —
•
Granted: 1963-09-10
•
Expires: 1980-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:07
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A PROCESS FOR MAKING SODIUM CARBONATE MONOHYDRATE WHICH COMPRISES: REACTING AN AQUEOUS SODIUM CARBONATE LIQUOR WITH AN AQUEOUS CAUSTIC SODA LIQUOR CONTAINING AT LEAST 56% AND NOT MORE THAN ABOUT 63% BY WEIGHT OF SODIUM HYDROXIDE WHEREBY SODIUM CARBONATE MONOHYDRATE IS PRECIPITATED WITHOUT APPLICATION OF ADDITIONAL HEAT, THE AMOUNT OF SAID CAUSTIC SODA LIQUOR AND THE CONCENTRATION OF SAID SODIUM CARBONATE LIQUOR BEING SUCH THAT THE MOTHER LIQIOR RESULTING FROM THE PRECIPITATION CONTAINS LESS THAN 20% BY WEIGHT OF SODIUM HYDROXIDE AND MORE THAN 6% BY WEIGHT OF SIODIUM CARBONATE; SEPARATING SAID PRECIPITATED SODIUM CARBONATE MONOHYDRATE; REACTING SAID MOTHER LIQUOR AT A TEMPERATURE ABOVE 30*C. WITH SUFFICIENT OF A CARBON DIOXIDECONTAINING GAS TO GIVE A CARBONATED LIQUOR IN WHICH SUBSTANTIALLY ALL SODIUM HYDROXIDE HAS BEEN CONVERTED TO SODIUM CARBONATE; REACTING SAID CARBONATED LIQUOR WITH AN AQUEOUS CAUSTIC SODA LIQUOR CONTAINING AT LEAST 56% AND NOT MORE THAN ABOUT 63% BY WEIGHT OF SODIUM HYDROXIDE WHEREBY FURTHER SODIUM CARBONATE MONOOHYDRATE IS PRECIPITATED WITHOUT APPLICATION OF ADDITIONAL HEAT; REMOVING FROM THE PROCESS WATER VAPORIZED FROM SAID LIQUOORS BY THE HEAT WHICH IS LIBERATED DURING SAID CARBONATION AND PRECIPITATION REACTIONS; AND SEPARATING SAID FURTHER PRECIPITATED SODIUM CARBONATE MONOHYDRATE.
Claim 2
Dependent Claim
195 words
A PROCESS FOR MAKING SODIUM CARBONATE MONOHYDRATE WHICH COMPRISES: REACTING AN AQUEOUS SODIUM CARBONATE LIQUOR WITH AN AQUEOUS CAUSTIC SODA LIQUOR CONTAINING AT LEAST 56% AND NOT MORE THAN ABOUT 63% BY WEIGHT OF SODIUM HYDROXIDE WHEREBY SODIUM CARBONATE MONOHYDRATE IS PRECIPITATED WITHOUT APPLICATION OF ADDITIONAL HEAT, THE AMOUNT OF SAID CAUSTIC SODA LIQUOR AND THE CONCENTRATION OF SAID SODIUM CARBONATE LIQUOR BEING SUCH THAT THE MOTHER LIQIOR RESULTING FROM THE PRECIPITATION CONTAINS LESS THAN 20% BY WEIGHT OF SODIUM HYDROXIDE AND MORE THAN 6% BY WEIGHT OF SIODIUM CARBONATE; SEPARATING SAID PRECIPITATED SODIUM CARBONATE MONOHYDRATE; REACTING SAID MOTHER LIQUOR AT A TEMPERATURE ABOVE 30*C. WITH SUFFICIENT OF A CARBON DIOXIDECONTAINING GAS TO GIVE A CARBONATED LIQUOR IN WHICH SUBSTANTIALLY ALL SODIUM HYDROXIDE HAS BEEN CONVERTED TO SODIUM CARBONATE; REACTING SAID CARBONATED LIQUOR WITH AN AQUEOUS CAUSTIC SODA LIQUOR CONTAINING AT LEAST 56% AND NOT MORE THAN ABOUT 63% BY WEIGHT OF SODIUM HYDROXIDE WHEREBY FURTHER SODIUM CARBONATE MONOOHYDRATE IS PRECIPITATED WITHOUT APPLICATION OF ADDITIONAL HEAT; REMOVING FROM THE PROCESS WATER VAPORIZED FROM SAID LIQUOORS BY THE HEAT WHICH IS LIBERATED DURING SAID CARBONATION AND PRECIPITATION REACTIONS; AND SEPARATING SAID FURTHER PRECIPITATED SODIUM CARBONATE MONOHYDRATE.
References Cited (Backward Citations)
US2133455A
Cited
US2842489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |