US2854477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making alkyl diphenyl ether sulfonates
Assignee: Dow Chemical Co
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Filing: 1956-11-20
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Granted: 1958-09-30
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Expires: 1976-11-20
Abstract
No abstract record available.
Inventors
- 👤 Alfred F Steinhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:25
CPC Classifications
C; C07; C07C; C07C309/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD OF MAKING AN ALKYL DIPHENYL ETHER SULFONATE, WHICH METHOD COMPRISES REACTING A SULFONATING AGENT SELECTED FROM THE GROUP CONSISTING OF SULFUR TRIOXIDE AND CHLOROSULFONIC ACID, WITH AT LEAST ONE ALKYLATED DIPHENYL ETHER HAVING AN AVERAGEOF FROM 1 TO 1. ALKYL SUBSTITUENTS, EACH CORRESPONDING TO AN ALKYL RADICAL CONTAINING FROM 9 TO 15 CARBON ATOMS, ON AROMATIC NUCLEI THEREOF, IN AMOUNTS CORRESPONDING TO FROM 1.8 TO 2.3 GRAM MOLECULAR PROPORTIONS OF THE SULFONATING AGENT PER GRAM MOLECULAR EQUIVALENT DISPHENYL ETHER NUCLEUS, WHILE HAVING THE REACTANTS DISSOLVED IN A LIQUID POLYCHLORINATED ALIPHATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF METHYLENE CHLORIDE, CATBON TETRACHLORIDE, PERCHLOROETHYLENE, SYM-TETRACHLOROETHANE AND ETHYLENE DICHLORIDE, IN A TOTAL CONCENTRATION OF THE REACTANTS FROM 2 TO 45 PERCENT BY WEIGHT OF THE SOLUTION AND AT REACTION TEMPERATURES BETWEEN -20* AND 60*C. AND SEPARATING THE RESULTING ALKYL DIPHENYL EHTER SULFONATE FROM THE POLYCHLORINATED ALIPHATIC HYDROCARBON.
Claim 2
Independent Claim
146 words
A METHOD OF MAKING AN ALKYL DIPHENYL ETHER SULFONATE, WHICH METHOD COMPRISES REACTING A SULFONATING AGENT SELECTED FROM THE GROUP CONSISTING OF SULFUR TRIOXIDE AND CHLOROSULFONIC ACID, WITH AT LEAST ONE ALKYLATED DIPHENYL ETHER HAVING AN AVERAGEOF FROM 1 TO 1. ALKYL SUBSTITUENTS, EACH CORRESPONDING TO AN ALKYL RADICAL CONTAINING FROM 9 TO 15 CARBON ATOMS, ON AROMATIC NUCLEI THEREOF, IN AMOUNTS CORRESPONDING TO FROM 1.8 TO 2.3 GRAM MOLECULAR PROPORTIONS OF THE SULFONATING AGENT PER GRAM MOLECULAR EQUIVALENT DISPHENYL ETHER NUCLEUS, WHILE HAVING THE REACTANTS DISSOLVED IN A LIQUID POLYCHLORINATED ALIPHATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF METHYLENE CHLORIDE, CATBON TETRACHLORIDE, PERCHLOROETHYLENE, SYM-TETRACHLOROETHANE AND ETHYLENE DICHLORIDE, IN A TOTAL CONCENTRATION OF THE REACTANTS FROM 2 TO 45 PERCENT BY WEIGHT OF THE SOLUTION AND AT REACTION TEMPERATURES BETWEEN -20* AND 60*C. AND SEPARATING THE RESULTING ALKYL DIPHENYL EHTER SULFONATE FROM THE POLYCHLORINATED ALIPHATIC HYDROCARBON.
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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |