US2522212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of aqueous solutions of hydrocarbon sulfates and sulfonates
Assignee: Shell Development Co
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Filing: 1947-12-13
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Granted: 1950-09-12
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Expires: 1967-12-13
Abstract
No abstract record available.
Inventors
- 👤 Dammers Hendrik Frederik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:23
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/02; F02P7/021; F02P7/026; C; C07; C07C; C07C303/00; C07C303/42; C07C303/44; F02P3/00; F02P3/01; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR THE PRODUCTION OF A CONCENTRATED SOLUTION OF A SURFACE-ACTIVE SALT OF AN ORGANIC ACID HAVING A -SO3H GROUP LINKED TO A HYDROCARBON RADICAL OF 8 TO 25 CARBON ATOMS PER MOLECULE FROM LESS CONCENTRATED AQUEOUS SOLUTIONS THEREOF SUBSTATIALLY FREE FROM INORGANIC SALTS WHICH COMPRISES SALTING OUT SAID SURFACEACTIVE SALT FROM THE LESS CONCENTRATED SUBSTANTIALLY INORGANIC SALT-FREE SOLUTION BY ADDITION OF A WATER-SOLUBLE INORGANIC SALT AND FROM 3% TO NOT MORE THAN 10% BY WEIGHT BASED ON SAID LESS CONCENTRATED SOLUTION OF A POLAR ORGANIC SOLVENT FOR SAID SURFACE-ACTIVE SALT, WHICH SOLVENT HAS A BOILING POINT ABOVE 100*C., IS LIQUID UNDER THE OPERATING CONDITIONS, AND IS SUBSTANTIALLY INSOLUBLE IN THE SOLUTION OF SAID INORGANIC SALT, SEPARATING THE RESULTING PHASES, AND RECOVERIG A CONCENTRATED SOLUTION OF THE SURFACE-ACTIVE SALT OF SAID ORGANIC ACID CONTAINING SAID POLAR ORGANIC SOLVENT.
Claim 2
Dependent Claim
139 words
A PROCESS FOR THE PRODUCTION OF A CONCENTRATED SOLUTION OF A SURFACE-ACTIVE SALT OF AN ORGANIC ACID HAVING A -SO3H GROUP LINKED TO A HYDROCARBON RADICAL OF 8 TO 25 CARBON ATOMS PER MOLECULE FROM LESS CONCENTRATED AQUEOUS SOLUTIONS THEREOF SUBSTATIALLY FREE FROM INORGANIC SALTS WHICH COMPRISES SALTING OUT SAID SURFACEACTIVE SALT FROM THE LESS CONCENTRATED SUBSTANTIALLY INORGANIC SALT-FREE SOLUTION BY ADDITION OF A WATER-SOLUBLE INORGANIC SALT AND FROM 3% TO NOT MORE THAN 10% BY WEIGHT BASED ON SAID LESS CONCENTRATED SOLUTION OF A POLAR ORGANIC SOLVENT FOR SAID SURFACE-ACTIVE SALT, WHICH SOLVENT HAS A BOILING POINT ABOVE 100*C., IS LIQUID UNDER THE OPERATING CONDITIONS, AND IS SUBSTANTIALLY INSOLUBLE IN THE SOLUTION OF SAID INORGANIC SALT, SEPARATING THE RESULTING PHASES, AND RECOVERIG A CONCENTRATED SOLUTION OF THE SURFACE-ACTIVE SALT OF SAID ORGANIC ACID CONTAINING SAID POLAR ORGANIC SOLVENT.
References Cited (Backward Citations)
US525784A
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US2316719A
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US1474933A
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US2152163A
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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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |