US2594690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for neutralizing and spray drying an organic sulfonic acid
Assignee: California Research LLC
•
Filing: 1948-04-30
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Granted: 1952-04-29
•
Expires: 1968-04-30
Abstract
No abstract record available.
Inventors
- 👤 William H Shiffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:55
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/32; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/02; Y10S516/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A CONTINUOUS PROCESS FOR PRODUCING SALTS OF A SURFACE-ACTIVE ALKYL ARYL SULFONIC ACID, WHICH COMPRISES NEUTRALIZING A LIQUID FEED STREAM CONTAINING AN ALKYL ARYL SULFONIC ACID IN A MIXTURE WITH SULFURIC ACID, BY MIXING SAID FEED STREAM WITH A STREAM OF AN AQUEOUS DISPERSION OF AN INORGANIC ALKALINE CARBONATE IN A COMFINED SPACE, WHILE RETAINING CARBON DIOXIDE GAS PRODUCED BY SAID NEUTRALIZATION IN SAID CONFINED SPACE TO FORM A POLYPHASE MIXTURE OF SAID CARBON DIOXIDE GAS AND AN AQUEOUS LIQUID WHICH CONTAINS THE SALT OF SAID ALKYL ARYL SULFONIC ACID AND THE SULFATE RESULTING FROM NEUTRALIZATON WITH SAID ALKALINE CARBONATE; ATOMIZING SAID POLYPHASE MIXTURE BY MEANS OF THE AUTOGENOUS PRESSURE OF CARBON DIOXIDE GAS CONTAINED THEREIN INTO A STREAM OF HOT AIR TO RELEASE CARBON DIOXIDE GAS THEREFROM; DRYING THE ATOMIZED PARTICLES BY MAINTAINING THEM
Claim 2
Dependent Claim
135 words
A CONTINUOUS PROCESS FOR PRODUCING SALTS OF A SURFACE-ACTIVE ALKYL ARYL SULFONIC ACID, WHICH COMPRISES NEUTRALIZING A LIQUID FEED STREAM CONTAINING AN ALKYL ARYL SULFONIC ACID IN A MIXTURE WITH SULFURIC ACID, BY MIXING SAID FEED STREAM WITH A STREAM OF AN AQUEOUS DISPERSION OF AN INORGANIC ALKALINE CARBONATE IN A COMFINED SPACE, WHILE RETAINING CARBON DIOXIDE GAS PRODUCED BY SAID NEUTRALIZATION IN SAID CONFINED SPACE TO FORM A POLYPHASE MIXTURE OF SAID CARBON DIOXIDE GAS AND AN AQUEOUS LIQUID WHICH CONTAINS THE SALT OF SAID ALKYL ARYL SULFONIC ACID AND THE SULFATE RESULTING FROM NEUTRALIZATON WITH SAID ALKALINE CARBONATE; ATOMIZING SAID POLYPHASE MIXTURE BY MEANS OF THE AUTOGENOUS PRESSURE OF CARBON DIOXIDE GAS CONTAINED THEREIN INTO A STREAM OF HOT AIR TO RELEASE CARBON DIOXIDE GAS THEREFROM; DRYING THE ATOMIZED PARTICLES BY MAINTAINING THEM
References Cited (Backward Citations)
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Cited
US2187244A
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US2316670A
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US2325320A
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US2477383A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |