US3723565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin feed purification in an alkylation process
Assignee: Phillips Petroleum Co
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Filing: 1971-08-19
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Granted: 1973-03-27
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Expires: 1991-08-19
Abstract
Abstract An olefin stream, e.g., ethylene, produced, for example, by naphtha cracking and containing methane and hydrogen impurities is absorbed from the major portion of the impurities using a portion of the subsequently produced alkylate. Alkylate containing absorbed ethylene is flashed, the liquid remaining after flashing is passed to a fractionation column from which an isoparaffin such as isobutane is removed and admixed with flashed vaporous ethylene, and the mixture is charged as feed to an alkylation process.
Inventors
- 👤 M Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:30
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C9/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
A process according to claim 1 wherein separation in step (d) is effected by passing the alkylation effluent to a depropanizer wherein paraffin and lower materials are taken overhead and isobutane and heavier materials are removed as bottoms, and said bottoms is passed to a deisobutanizer column wherein isobutane is taken overhead and passed to said alkylation process and DIP alkylate is removed as bottoms.
Claim 2
Dependent Claim
22 words
A process according to claim 2 wherein said DIP alkylate absorbent substantially freed of ethylene following flashing is introduced into said deisobutanizer.
Claim 3
Dependent Claim
42 words
A process according to claim 1 wherein said olefin feed stream comprising ethylene is produced by naphtha cracking and coNtains methane and hydrogen as impurities, and the ethylene is absorbed therefrom by contact with a portion of the subsequently produced DIP alkylate.
Claim 4
Dependent Claim
67 words
A process according to claim 4 wherein the ethylene-rich DIP alkylate stream obtained from step (a) is flashed, the flashed ethylene vapor being taken overhead, and the liquid from the flashing is passed to a deisobutanizer zone from which cooled condensed isobutane is removed overhead and is admixed with the flashed ethylene-rich vapor, and the mixture thus formed is charged as liquid feed to the alkylation process.
References Cited (Backward Citations)
US2286504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |