US3479390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysis of an esterification with a permeable membrane of sulfonated poly(2,6-dialkylphenol)
Assignee: Mobil Oil AS
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Filing: 1965-03-12
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Granted: 1969-11-18
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Expires: 1985-03-12
Abstract
No abstract record available.
Inventors
- 👤 Paul E Blatz
- 👤 Sam R Faris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:35
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; B; B01; B01J; B01J35/00; B01J35/30; B01J35/391; B01J35/395
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A METHOD OF CARRYING OUT AN ESTERIFICATION REACTION BETWEEN A CARBOXYLIC ACID AND AN ALCOHOL, WHICH REACTION IS SUBJECT TO CATALYSIS BY A SULFONIC ACID GROUP; THE IMPROVEMENT WHICH COMPRISES FLOWING SAID ACID AND ALCOHOL INTO A REACTION CHAMBER DEFINED AT LEAST IN PART BY A PERMEABLE MEMBRANE OF SULFONATED POLY (2,6-DIALKYL PHENOL) WHEREIN THE ALKYL GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF METHYL, ETHYL, AND N-PROPYL GROUPS, CONTACTING SAID MEMBRANE WITH SAID ACID AND ALCOHOL TO EFFECT CATALYSIS OF SAID REACTION, AND ESTABLISHING A PRESSURE GRADIENT ACROSS SAID MEMBRANE FROM THE INTERIOR OF SAID REACTION CHAMBER TO THE EXTERIOR THEREOF WHEREBY UNREACTED ACID IS SELECTIVELY RESTRICTED FROM PASSAGE THROUGH SAID MEMBRANE AND UNREACTED ALCOHOL AND THE ESTER AND WTER PRODUCED BY SAID REACTANTS ARE SELECTIVELY PASSED THROUGH SAID MEMBRANE.
Claim 2
Dependent Claim
132 words
IN A METHOD OF CARRYING OUT AN ESTERIFICATION REACTION BETWEEN A CARBOXYLIC ACID AND AN ALCOHOL, WHICH REACTION IS SUBJECT TO CATALYSIS BY A SULFONIC ACID GROUP; THE IMPROVEMENT WHICH COMPRISES FLOWING SAID ACID AND ALCOHOL INTO A REACTION CHAMBER DEFINED AT LEAST IN PART BY A PERMEABLE MEMBRANE OF SULFONATED POLY (2,6-DIALKYL PHENOL) WHEREIN THE ALKYL GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF METHYL, ETHYL, AND N-PROPYL GROUPS, CONTACTING SAID MEMBRANE WITH SAID ACID AND ALCOHOL TO EFFECT CATALYSIS OF SAID REACTION, AND ESTABLISHING A PRESSURE GRADIENT ACROSS SAID MEMBRANE FROM THE INTERIOR OF SAID REACTION CHAMBER TO THE EXTERIOR THEREOF WHEREBY UNREACTED ACID IS SELECTIVELY RESTRICTED FROM PASSAGE THROUGH SAID MEMBRANE AND UNREACTED ALCOHOL AND THE ESTER AND WTER PRODUCED BY SAID REACTANTS ARE SELECTIVELY PASSED THROUGH SAID MEMBRANE.
References Cited (Backward Citations)
US3182043A
Cited
US3259592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |