Patent US4285319A successfully refreshed from Google Patents.
US3619418A
Expired / Lapsed
US
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Storing desorbent separated from adsorption effluent
Assignee: Texaco Inc
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Filing: 1969-06-30
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Granted: 1971-11-09
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Expires: 1989-06-30
Abstract
Abstract Improved process for the separation of straight chain hydrocarbons from petroleum fractions containing same admixed with nonstraight chain hydrocarbons by a molecular sieve selective adsorbent of Type 5A structure wherein a first desorbing medium of relatively low purity with respect to its straight chain hydrocarbon content is used as the first desorbing medium of the process to produce a final desorbing medium having a relatively high purity in straight chain hydrocarbon content while producing straight chain hydrocarbon products.
Inventors
- 👤 Ralph M Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:45
CPC Classifications
C; C10; C10G; C10G25/00; C07; C07C; C07C7/00; C07C7/12; C07C7/13; C10G25/02; C10G25/03
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
138 words
A process as claimed in claim 1 wherein a portion of said segregated first desorbing medium fraction is admixed with a portion of said first desorbing medium thereby producing an intermediate desorbing medium richer in straight chain hydrocarbon content than said first desorbing medium, said intermediate desorbing medium is employed as desorbing medium in a subsequent desorption step of the cyclic process, in a subsequent adsorption step, segregating a segregated second desorbed desorbing medium fraction having a straight chain hydrocarbon content richer than said segregated first desorbed desorbing medium fraction from the resulting adsorption effluent, repeating said cycle and segregation to provide said segregated second desorbed desorbing medium fraction in an amount sufficient for desorption of said selective adsorbent and thereafter in a subsequent desorption step desorbing said selective adsorbent with said segregated second desorbed desorbing medium fraction.
Claim 2
Dependent Claim
52 words
A process as claimed in claim 1 wherein at least a portion of said segregated first desorbed desorbing medium fraction is admixed with a portion of said first desorbing medium, and the resulting admixed desorbing medium mixture is employed as the desorbing medium in the desorption step of a subsequent process cycle.
Claim 3
Dependent Claim
105 words
A process as claimed in claim 1 wherein said segregated first desorbed desorbing medium fraction is employed as desorbing medium in a subsequent desorption step of the cyclic process, in a subsequent adsorption step segregating a segregated second desorbed desorbing medium fraction having a straight chain hydrocarbon content richer than said segregated first desorbed desorbing medium from the resulting adsorption effluent, repeating said cycle and said segregation to provided said segregated second desorbed desorbing medium fraction in an amount sufficient for desorption of said selective adsorbent and thereafter in a subsequent desorption step desorbing said selective adsorbent with said segregated second desorbed desorbing medium fraction.
Claim 4
Dependent Claim
46 words
A process as claimed in claim 1 wherein the concentration of straight chain hydrocarbons in said first desorbing medium is about 50 to about 60% by weight, and the concentration of straight chain hydrocarbons in said segregated first desorbed desorbing medium fraction is 70-79% by weight.
Claim 5
Dependent Claim
20 words
A process as claimed in claim 1 wherein the first desorbing medium contains from 50-70% by weight of normal heptane.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |