US3068279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of alkyl aryl sulfonates
Assignee: ConocoPhillips Co
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Filing: 1959-07-20
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Granted: 1962-12-11
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Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 Jr William L Groves
- 👤 Billy W Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:04
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/30; C07C309/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A METHOD FOR THE PREPARATION OF ALKYL ARYL SULFONIC ACIDS OF IMPROVED COLOR COMPRISING (1) REACTING AN ALKYL ARYL HYDROCARBON WHEREIN SAID ARYL RADICAL IS SELECTED FROM THE GROUP CONSISTING OF PHENYL, TOLYL AND XYLYL RADICALS, AMD SAID ALKYL RADICALS CONTAIN FROM 9-18 CARBON ATOMS THEREIN WITH A SULFONATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLOROSULFONIC ACID, SULFUR TRIOXIDE, SULFURIC ACID AND OLEUM, (2) SEPARATING SPENT SULFONATING AGENT, (3) HYDROLYZING ANY SULFONIC ACID ANHYDRIDES PRESENT WITH WATER, (4) BLEACHING SAID SULFONIC ACID BY TREATMENT WITH 0.1 TO 3 WEIGHT PERCENT OF HYDROGEN PEROXIDE, THE IMPROVEMENT CONSISTING OF ADDING 1-4 WEIGHT PERCENT OF A WATER SOLUBLE ORGANIC NITROGEN BASE SELECTED FROM THE GROUP CONSISTING OF TRIETHANOLAMINE, ISOPROPYLAMINE AND UREA SUBSEQUENT TO THE HYDROLYSIS OF ANY SULFONIC ACID ANHYDRIDES AND PRIOR TO SAID BLEACHING.
Claim 2
Dependent Claim
134 words
IN A METHOD FOR THE PREPARATION OF ALKYL ARYL SULFONIC ACIDS OF IMPROVED COLOR COMPRISING (1) REACTING AN ALKYL ARYL HYDROCARBON WHEREIN SAID ARYL RADICAL IS SELECTED FROM THE GROUP CONSISTING OF PHENYL, TOLYL AND XYLYL RADICALS, AMD SAID ALKYL RADICALS CONTAIN FROM 9-18 CARBON ATOMS THEREIN WITH A SULFONATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLOROSULFONIC ACID, SULFUR TRIOXIDE, SULFURIC ACID AND OLEUM, (2) SEPARATING SPENT SULFONATING AGENT, (3) HYDROLYZING ANY SULFONIC ACID ANHYDRIDES PRESENT WITH WATER, (4) BLEACHING SAID SULFONIC ACID BY TREATMENT WITH 0.1 TO 3 WEIGHT PERCENT OF HYDROGEN PEROXIDE, THE IMPROVEMENT CONSISTING OF ADDING 1-4 WEIGHT PERCENT OF A WATER SOLUBLE ORGANIC NITROGEN BASE SELECTED FROM THE GROUP CONSISTING OF TRIETHANOLAMINE, ISOPROPYLAMINE AND UREA SUBSEQUENT TO THE HYDROLYSIS OF ANY SULFONIC ACID ANHYDRIDES AND PRIOR TO SAID BLEACHING.
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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |