Patent US3217055A successfully refreshed from Google Patents.
US3217055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Re-extraction method
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1962-07-16
•
Granted: 1965-11-09
•
Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 William R Edwards
- 👤 Robert D Wesselhoft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:12
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; C07C7/171; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/955
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A METHOD OF MAXIMIZING THE DRIVING FROCE AND THE RECOVERY OF A TERTIARY OLEFIN FROM A SULFURIC ACID EXTRACT WHICH COMPRISES ADMIXING SAID ACID EXTRACT WITH A SOLVENT HYDROCARBON AT A TEMPERATURE BELOW THE RE-EXTRACTION TEMPERATURE, HEATING THE ADMIXTURE TO THE RE-EXTRACTION TEMPERATURE, PASSING SAID ACID EXTRACT AND SOLVENT HYDROCARBON AT SAID RE-EXTRACTION TEMPERTURE IN CONCRURENT FLOW IN SAID ADMIXTURE THROUGH A RE-EXTRACTION ZONE HAVING AN L/D RATIO WITHIN THE RANGE FROM ABOUT 10:1 TO 100:1, WHEREBY BACK-MIXING OF THE ACID PHASE IN SUBSTANTIALLY PREVENTED, SEPEARTING THE RE-EXTRACTED MIXTURE AFTER A RE-EXTRACTION RESIDENCE TIME WITHIN THE RANGE FROM ABOUT 0.1 TO ABOUT 10 MINUTES INTO A ACID PHASE, AND A HYDROCARBON PHASE, AND RECOVERING SAID TERTIARY OLEFIN FROM SAID HYROCARBON PHAE, SID ACID EXTRACT AND SAID SOLVENT HYDROCARBON BEING MAINTAINED IN CONCURRENT FLOW AT ALL TIMES AFTER BEING HEATED TO THE RE-EXTRACTION TEMPERATURE AND UNTIL SAID SEPARATION INTO SAID LEAN AICD PHASE AND SAID HYDROCARBON PHASE.
Claim 2
Independent Claim
156 words
A METHOD OF MAXIMIZING THE DRIVING FROCE AND THE RECOVERY OF A TERTIARY OLEFIN FROM A SULFURIC ACID EXTRACT WHICH COMPRISES ADMIXING SAID ACID EXTRACT WITH A SOLVENT HYDROCARBON AT A TEMPERATURE BELOW THE RE-EXTRACTION TEMPERATURE, HEATING THE ADMIXTURE TO THE RE-EXTRACTION TEMPERATURE, PASSING SAID ACID EXTRACT AND SOLVENT HYDROCARBON AT SAID RE-EXTRACTION TEMPERTURE IN CONCRURENT FLOW IN SAID ADMIXTURE THROUGH A RE-EXTRACTION ZONE HAVING AN L/D RATIO WITHIN THE RANGE FROM ABOUT 10:1 TO 100:1, WHEREBY BACK-MIXING OF THE ACID PHASE IN SUBSTANTIALLY PREVENTED, SEPEARTING THE RE-EXTRACTED MIXTURE AFTER A RE-EXTRACTION RESIDENCE TIME WITHIN THE RANGE FROM ABOUT 0.1 TO ABOUT 10 MINUTES INTO A ACID PHASE, AND A HYDROCARBON PHASE, AND RECOVERING SAID TERTIARY OLEFIN FROM SAID HYROCARBON PHAE, SID ACID EXTRACT AND SAID SOLVENT HYDROCARBON BEING MAINTAINED IN CONCURRENT FLOW AT ALL TIMES AFTER BEING HEATED TO THE RE-EXTRACTION TEMPERATURE AND UNTIL SAID SEPARATION INTO SAID LEAN AICD PHASE AND SAID HYDROCARBON PHASE.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |