Patent US2988577A successfully refreshed from Google Patents.
US2988577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective sorption process
Assignee: Texaco Inc
•
Filing: 1957-04-11
•
Granted: 1961-06-13
•
Expires: 1977-04-11
Abstract
No abstract record available.
Inventors
- 👤 Eugene E Sensel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:26
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A PROCESS FOR THE SEPARATION OF STRAIGHT CHAIN HYDROCARBONS FROM A MIXTURE OF STRAIGHT CHAIN AND NONSTRAIGHT CHAIN HYDROCARBONS WHEREIN THE MIXTURE IS CONTACTED UNDER VAPOR PHASE HYDROCARBON SORBING CONDITIONS WITH A DEHYDRATED CRYSTALLINE ZEOLITE OF TYPE A STRUCTURE HAVING AT LEAST A PART OF ITS EXCHANGEABLE CATION CONTENT REPLACED WITH A DIVALENT METAL ION FOR A PERIOD OF TIME SUFFICIENT TO EFFECT SORPTION OF SAID STRAIGHT CHAIN HYDROCARBON BY SAID ZEOLITE, AND THEREAFTER DESORBING STRAIGHT CHAIN HYDROCARBON FROM THE LADEN ZEOLITE, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID MIXTURE WITH A TYPE A ZEOLITE WHEREIN ABOUT 0.3 TO ABOUT 0.95 OF THE EXCHANGEABLE CATION CONTENT IS DIVALENT CADMIUM FOR A PERIOD WITHIN THE RANGE OF 1 TO 4 MINUTES SUFFICIENT TO EFFECT ABOUT 80 TO 95 PERCENT SATURATION OF SAID ZEOLITE WITH THE STRAIGHT CHAIN HYDROCARBON PRESENT IN THE MIXTURE.
Claim 2
Dependent Claim
141 words
IN A PROCESS FOR THE SEPARATION OF STRAIGHT CHAIN HYDROCARBONS FROM A MIXTURE OF STRAIGHT CHAIN AND NONSTRAIGHT CHAIN HYDROCARBONS WHEREIN THE MIXTURE IS CONTACTED UNDER VAPOR PHASE HYDROCARBON SORBING CONDITIONS WITH A DEHYDRATED CRYSTALLINE ZEOLITE OF TYPE A STRUCTURE HAVING AT LEAST A PART OF ITS EXCHANGEABLE CATION CONTENT REPLACED WITH A DIVALENT METAL ION FOR A PERIOD OF TIME SUFFICIENT TO EFFECT SORPTION OF SAID STRAIGHT CHAIN HYDROCARBON BY SAID ZEOLITE, AND THEREAFTER DESORBING STRAIGHT CHAIN HYDROCARBON FROM THE LADEN ZEOLITE, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID MIXTURE WITH A TYPE A ZEOLITE WHEREIN ABOUT 0.3 TO ABOUT 0.95 OF THE EXCHANGEABLE CATION CONTENT IS DIVALENT CADMIUM FOR A PERIOD WITHIN THE RANGE OF 1 TO 4 MINUTES SUFFICIENT TO EFFECT ABOUT 80 TO 95 PERCENT SATURATION OF SAID ZEOLITE WITH THE STRAIGHT CHAIN HYDROCARBON PRESENT IN THE MIXTURE.
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |