Patent US2859256A successfully refreshed from Google Patents.
US2859256A
Expired / Lapsed
US
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Separation process involving adsorption and desorption
Assignee: Texaco Inc
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Filing: 1955-01-28
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Granted: 1958-11-04
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Expires: 1975-01-28
Abstract
No abstract record available.
Inventors
- 👤 Howard V Hess
- 👤 Michael D Riordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:25
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; C; C07; C07C; C07C7/00; C07C7/12; C07C7/13; C10; C10G; C10G25/00; C10G25/02; C10G25/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PROCESS FOR SEPARATING STRAIGHT CHAIN HYDROCARBONS FROM A MIXTURE CONTAINING THE SAME TOGETHER WITH NON-STRAIGHT CHAIN HYDROCARBONS WHICH COMPRISES CONTACTING SAID MIXTURE IN THE VAPOR PHASE AT AN ELEVATED TEMPERATURE AND PRESSURE WITH A SELECTIVE ADSORBENT WHICH SELECTIVELY ABSORBS STRAIGHT CHAIN HYDROCARBONS TO THE SUBSTANTIAL EXCLUSION OF NON-STRAIGHT CHAIN HYDROCARBONS TO ADSORB STRAIGHT CHAIN HYDROCARBONS THEREFROM TO YIELD A GASEOUS TREATED EFFLUENT HAVING A REDUCED AMOUNT OF STRAIGHT CHAIN HYDROCARBONS, DISPLACING SAID GASEOUS EFFLUENT FROM SAID SOLID ADSORBENT MATERIAL BY MEANS OF A DISPLACING MEDIUM AND SUBJECTING THE RESULTING ADSORBENT MATERIAL NOW SUBSTANTIALLY FREE OF SAID EFFLUENT TO A REDUCED PRESSURE WHILE CONTACTING SAID ADSORBENT MATERIAL WITH A GASEOUS STRIPPING MEDIUM AT A SUITABLE ELEVATED TEMPERATURE TO DESORB THE ADSORBED STRAIGHT CHAIN HYDROCARBONS THEREFROM AND TO MAINTAIN THE DESORPTION OPERATION AT SUBSTANTIALLY THE SAME TEMPERATURE AS THE ADSORPTION OPERATION, THE RESULTING DESORBED STRAIGHT CHAIN HYDROCARBONS BEING IN THE GASEOUS PHASE.
Claim 2
Dependent Claim
151 words
A PROCESS FOR SEPARATING STRAIGHT CHAIN HYDROCARBONS FROM A MIXTURE CONTAINING THE SAME TOGETHER WITH NON-STRAIGHT CHAIN HYDROCARBONS WHICH COMPRISES CONTACTING SAID MIXTURE IN THE VAPOR PHASE AT AN ELEVATED TEMPERATURE AND PRESSURE WITH A SELECTIVE ADSORBENT WHICH SELECTIVELY ABSORBS STRAIGHT CHAIN HYDROCARBONS TO THE SUBSTANTIAL EXCLUSION OF NON-STRAIGHT CHAIN HYDROCARBONS TO ADSORB STRAIGHT CHAIN HYDROCARBONS THEREFROM TO YIELD A GASEOUS TREATED EFFLUENT HAVING A REDUCED AMOUNT OF STRAIGHT CHAIN HYDROCARBONS, DISPLACING SAID GASEOUS EFFLUENT FROM SAID SOLID ADSORBENT MATERIAL BY MEANS OF A DISPLACING MEDIUM AND SUBJECTING THE RESULTING ADSORBENT MATERIAL NOW SUBSTANTIALLY FREE OF SAID EFFLUENT TO A REDUCED PRESSURE WHILE CONTACTING SAID ADSORBENT MATERIAL WITH A GASEOUS STRIPPING MEDIUM AT A SUITABLE ELEVATED TEMPERATURE TO DESORB THE ADSORBED STRAIGHT CHAIN HYDROCARBONS THEREFROM AND TO MAINTAIN THE DESORPTION OPERATION AT SUBSTANTIALLY THE SAME TEMPERATURE AS THE ADSORPTION OPERATION, THE RESULTING DESORBED STRAIGHT CHAIN HYDROCARBONS BEING IN THE GASEOUS PHASE.
References Cited (Backward Citations)
US1453215A
Cited
US2306610A
Cited
US2376425A
Cited
US2390536A
Cited
US2449402A
Cited
US2442191A
Cited
US2425535A
Cited
US2586889A
Cited
US2620363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |