Patent US3236590A successfully refreshed from Google Patents.
US3236590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anhydrous dense soda ash
Assignee: Honeywell International Inc
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Filing: 1962-12-10
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Granted: 1966-02-22
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Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 Sopchak Peter
- 👤 Eugene B Port
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:15
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/35; C01D7/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
A PROCESS FOR THE CONVERSION OF LIGHT SODA ASH TO HIGH QUALITY DENSE SODA ASH SUITABLE FOR USE BY THE GLASS INDUSTRY WHICH COMPRISES ADMIXING LIGHT SODA ASH WITH AN AQUEOUS SOLUTION HAVING DISSOLVED THEREIN 4-16% BY WEIGHT OF SODIUM CHLORIDE AND 10-27% BY WEIGHT OF SODIUM CARBONATE TO PRODUCE A SLURRY OF SODIUM CARBONATE SOLIDS DISPERSED IN THE AQUEOUS LIQUID, MAINTAINING THE AQUEOUS SOLUTION DURING MIXING WITH THE LIGHT SODA ASH AT A TEMPERATURE BELOW THE TRANSITION TEMPERATURE FOR CONVERSION OF SODIUM CARBONATE MONOHYDRATE TO SODIUM CARBONATE BUT AT A TEMPERATURE NOT MORE THAN 5* BELOW THE TRANSITION TEMPERATURE, PASSING THE SLURRY OF LIGHT SODA ASH IN AQUEOUS LIQUID INTO A CRYSTALLIZATION ZONE AND MAINTAINING THE TEMPERATURE OF THE SLURRY IN SAID ZONE AT A TEMPERATURE WITHIN THE RANGE OF 7 TO 10*C. BELOW THE TRANSITION TEMPERATURE TO FORM CRYSTALS OF SODIUM CARBONATE MONOHYDRATE, SEPARATING THE CRYSTALLINE SODIUM CARBONATE MONOHYDRATE FROM MOTHER LIQUOR, WASHING THE CRYSTALLINE SODIUM CARBONATE MONOHYDRATE TO REMOVE ADHERENT IMPURITIES, DRYING THE SEPARATED CRYSTALLINE SODIUM CARBONATE MONOHYDRATE TO PRODUCE ANHYDROUS DENSE SODA ASH, AND RETURNING MOTHER LIQUOR TOGETHER WITH ADDED WATER FOR ADMIXING WITH ADDITIONAL LIGHT SODA ASH.
Claim 2
Dependent Claim
192 words
A PROCESS FOR THE CONVERSION OF LIGHT SODA ASH TO HIGH QUALITY DENSE SODA ASH SUITABLE FOR USE BY THE GLASS INDUSTRY WHICH COMPRISES ADMIXING LIGHT SODA ASH WITH AN AQUEOUS SOLUTION HAVING DISSOLVED THEREIN 4-16% BY WEIGHT OF SODIUM CHLORIDE AND 10-27% BY WEIGHT OF SODIUM CARBONATE TO PRODUCE A SLURRY OF SODIUM CARBONATE SOLIDS DISPERSED IN THE AQUEOUS LIQUID, MAINTAINING THE AQUEOUS SOLUTION DURING MIXING WITH THE LIGHT SODA ASH AT A TEMPERATURE BELOW THE TRANSITION TEMPERATURE FOR CONVERSION OF SODIUM CARBONATE MONOHYDRATE TO SODIUM CARBONATE BUT AT A TEMPERATURE NOT MORE THAN 5* BELOW THE TRANSITION TEMPERATURE, PASSING THE SLURRY OF LIGHT SODA ASH IN AQUEOUS LIQUID INTO A CRYSTALLIZATION ZONE AND MAINTAINING THE TEMPERATURE OF THE SLURRY IN SAID ZONE AT A TEMPERATURE WITHIN THE RANGE OF 7 TO 10*C. BELOW THE TRANSITION TEMPERATURE TO FORM CRYSTALS OF SODIUM CARBONATE MONOHYDRATE, SEPARATING THE CRYSTALLINE SODIUM CARBONATE MONOHYDRATE FROM MOTHER LIQUOR, WASHING THE CRYSTALLINE SODIUM CARBONATE MONOHYDRATE TO REMOVE ADHERENT IMPURITIES, DRYING THE SEPARATED CRYSTALLINE SODIUM CARBONATE MONOHYDRATE TO PRODUCE ANHYDROUS DENSE SODA ASH, AND RETURNING MOTHER LIQUOR TOGETHER WITH ADDED WATER FOR ADMIXING WITH ADDITIONAL LIGHT 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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |