US3360946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature process for the recovery of ethane from a stripped natural gas stream
Assignee: Millennium Petrochemicals Inc
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Filing: 1966-04-29
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Granted: 1968-01-02
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Expires: 1986-04-29
Abstract
No abstract record available.
Inventors
- 👤 Napoli Robert N Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/09; F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0228; F25J3/0233; F25J3/0238; F25J2200/00; F25J2200/02; F25J2200/74; F25J2205/00; F25J2205/02; F25J2205/04; F25J2240/00; F25J2240/02; F25J2270/00; F25J2270/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
207 words
A METHOD FOR RECOVERING A MAJOR PORTION OF THE C2+ HYDROCARBONS CONTENT OF A LEAN NATURAL GAS STREAM WITHOUT SUBSTANTIAL CONDEMNATION OF METHANE, THE C2+ HYDROCARBON CONTENT BEING ABOUT 3.5% OF THE FEED, COMPRISING (A) PROVIDING A LEAN NATURAL GAS FEED AT A PRESSURE IN EXCESS OF ABOUT 450 P.S.I.A., (B) PRE-COOLING THE LEAN NATURAL GAS FEED TO A TEMPERATURE ON THE ORDER OF FROM -75* TO -110*F., (C) INITIALLY EXPANDING THE LEAN NATURAL GAS FEED TO COOL THE LEAN NATURAL GAS FEED TO A TEMPERATURE IN THE RANGE OF FROM -90* TO -125*F. AND TO REDUCE THE PRESSURE OF THE LEAN NATURAL GAS FEED TO ABOVE ABOUT 400 P.S.I.A., (D) COOLING SAID EXPANDED LEAN NATURAL GAS FEED BY INDIRECT HEAT EXCHANGE WITH TAIL GAS AND THE LIQUID C2+ HYDROCARBONS CONDENSATE STREAM AND BY FURTHER EXPANSION OF SAID EXPANDED LEAN NATURAL GAS FEED TO FORM A TAIL GAS AND A LIQUID CONDENSATE RICH IN C2+ HYDROCARBONS CONTAINING THE MAJOR PORTION OF THE C2+ HYDROCARBONS IN THE FEED, (E) SEPARATING SAID LIQUID C2+ CONDENSATE FROM SAID TAIL GAS, (F) HEAT EXCHANGING SAID LIQUID C2+ CONDENSATE AND SAID TAIL GAS WITH SAID EXPANDED LEAN NATURAL GAS FEED IN STEP (D), AND (G) RECOVERING THE C2+ HYDROCARBONS AS A PRODUCT.
Claim 2
Independent Claim
207 words
A METHOD FOR RECOVERING A MAJOR PORTION OF THE C2+ HYDROCARBONS CONTENT OF A LEAN NATURAL GAS STREAM WITHOUT SUBSTANTIAL CONDEMNATION OF METHANE, THE C2+ HYDROCARBON CONTENT BEING ABOUT 3.5% OF THE FEED, COMPRISING (A) PROVIDING A LEAN NATURAL GAS FEED AT A PRESSURE IN EXCESS OF ABOUT 450 P.S.I.A., (B) PRE-COOLING THE LEAN NATURAL GAS FEED TO A TEMPERATURE ON THE ORDER OF FROM -75* TO -110*F., (C) INITIALLY EXPANDING THE LEAN NATURAL GAS FEED TO COOL THE LEAN NATURAL GAS FEED TO A TEMPERATURE IN THE RANGE OF FROM -90* TO -125*F. AND TO REDUCE THE PRESSURE OF THE LEAN NATURAL GAS FEED TO ABOVE ABOUT 400 P.S.I.A., (D) COOLING SAID EXPANDED LEAN NATURAL GAS FEED BY INDIRECT HEAT EXCHANGE WITH TAIL GAS AND THE LIQUID C2+ HYDROCARBONS CONDENSATE STREAM AND BY FURTHER EXPANSION OF SAID EXPANDED LEAN NATURAL GAS FEED TO FORM A TAIL GAS AND A LIQUID CONDENSATE RICH IN C2+ HYDROCARBONS CONTAINING THE MAJOR PORTION OF THE C2+ HYDROCARBONS IN THE FEED, (E) SEPARATING SAID LIQUID C2+ CONDENSATE FROM SAID TAIL GAS, (F) HEAT EXCHANGING SAID LIQUID C2+ CONDENSATE AND SAID TAIL GAS WITH SAID EXPANDED LEAN NATURAL GAS FEED IN STEP (D), AND (G) RECOVERING THE C2+ HYDROCARBONS AS A PRODUCT.
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |