US2655530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying alkylated aryl sulfonate detergents
Assignee: Atlantic Richfield Co
•
Filing: 1950-03-30
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Granted: 1953-10-13
•
Expires: 1970-03-30
Abstract
No abstract record available.
Inventors
- 👤 John A Nevison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:29
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42; C07C303/44; C07C303/02; C07C303/04; C07C303/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A METHOD FOR PRODUCING AN IMPROVED ALKYLATED ARYL SULFONATE DETERGENT CONTAINING NOT MORE THAN 0.1% BY WEIGHT OF UNSULFONATED HYDROCARBON FROM THE SULFONATION MIXTURE OBTAINED BY INTIMATELY CONTACTING AN ALKYLATED ARYL HYDROCARBON CONTAINING FROM 8 TO 15 CARBON ATOMS IN THE ALKYL GROUP WITH A SULFONATING AGENT, WHICH COMPRISES DILUTING THE SULFONATION MIXTURE WITH A HYDORCARBON SOLVENT BOILING BELOW 400* F. TO DISSOLVE THE ALKYLATED ARYL SULFONIC ACIDS BUT NOT THE SPENT SULFONATING AGENT, SETTING AND SEPARATING THE HYDROCARBON SOLUTION OF THE SULFONIC ACIDS FROM THE SPENT SULFONATING AGENT, INTIMATELY CONTACTING THE HYDROCARBON SOLUTION OF SULFONIC ACIDS WITH 2 TO 5 VOLUMES, PER VOLUME OF ORIGINAL ALKYLATED ARYL HYDROCARBON, OF A 25% TO 60% AQUEOUS ALCOHOL SOLUTION AND A SUFFICIENT AMOUNT OF A BASIC REAGENT TO NEUTRALIZE THE MIXTURE, FORMING TWO IMMISCIBLE LIQUID PHASES, ONE COMPRISING ESSENTIALLY HYDROCARBON SOLVENT AND MINOR AMOUNTS OF UNSULFONATED ALKYLATED ARYL HYDROCARBON, AND THE OTHER COMPRISING AN AQUEOUS ALCOHOL SOLUTION OF SULFONATES CONTAINING MINOR
Claim 2
Independent Claim
159 words
A METHOD FOR PRODUCING AN IMPROVED ALKYLATED ARYL SULFONATE DETERGENT CONTAINING NOT MORE THAN 0.1% BY WEIGHT OF UNSULFONATED HYDROCARBON FROM THE SULFONATION MIXTURE OBTAINED BY INTIMATELY CONTACTING AN ALKYLATED ARYL HYDROCARBON CONTAINING FROM 8 TO 15 CARBON ATOMS IN THE ALKYL GROUP WITH A SULFONATING AGENT, WHICH COMPRISES DILUTING THE SULFONATION MIXTURE WITH A HYDORCARBON SOLVENT BOILING BELOW 400* F. TO DISSOLVE THE ALKYLATED ARYL SULFONIC ACIDS BUT NOT THE SPENT SULFONATING AGENT, SETTING AND SEPARATING THE HYDROCARBON SOLUTION OF THE SULFONIC ACIDS FROM THE SPENT SULFONATING AGENT, INTIMATELY CONTACTING THE HYDROCARBON SOLUTION OF SULFONIC ACIDS WITH 2 TO 5 VOLUMES, PER VOLUME OF ORIGINAL ALKYLATED ARYL HYDROCARBON, OF A 25% TO 60% AQUEOUS ALCOHOL SOLUTION AND A SUFFICIENT AMOUNT OF A BASIC REAGENT TO NEUTRALIZE THE MIXTURE, FORMING TWO IMMISCIBLE LIQUID PHASES, ONE COMPRISING ESSENTIALLY HYDROCARBON SOLVENT AND MINOR AMOUNTS OF UNSULFONATED ALKYLATED ARYL HYDROCARBON, AND THE OTHER COMPRISING AN AQUEOUS ALCOHOL SOLUTION OF SULFONATES CONTAINING MINOR
References Cited (Backward Citations)
GB109709A
Cited
US1903466A
Cited
US2244512A
Cited
US2450585A
Cited
US2396673A
Cited
US2448184A
Cited
US2509863A
Cited
US2457146A
Cited
US2543885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |