Patent US2595284A successfully refreshed from Google Patents.
US2595284A
Expired / Lapsed
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Method and apparatus for treatment of gaseous hydrocarbon mixtures
Assignee: United States Department of the Interior
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Filing: 1948-12-31
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Granted: 1952-05-06
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Expires: 1968-12-31
Abstract
No abstract record available.
Inventors
- 👤 Paul V Mullins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:28
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0257; F25J3/0204; F25J3/0209; F25J3/0233; F25J3/0242; F25J3/028; F25J3/029; F25J2200/00; F25J2200/02; F25J2200/50; F25J2220/00; F25J2220/60; F25J2220/64; F25J2235/00; F25J2235/42; F25J2235/60; F25J2240/00; F25J2240/02; F25J2240/12; F25J2270/00; F25J2270/90; Y; Y10; Y10S; Y10S62/00; Y10S62/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS FOR TREATMENT OF GASEOUS HYDROCARBON MIXTURES CONTAINING A SUBSTANTIAL PROPORTION OF NITROGEN AS A DILUENT COMPRISING REFRIGERATING A STREAM OF THE GAS UNDER SUPERATMOSPHERIC PRESSURE WITH EFFLUENT METHANE IN A FIRST HEAT EXCHANGE ZONE, LIQUEFYING THE NITROGEN AND METHANE OF THE GAS BY ADIABATIC EXPANSION THEREOF FOLLOWED BY HEAT EXCHANGE WITH COLDER NITROGEN VAPORS IN A SECOND HEAT EXCHANGE ZONE, REFLUXING THE RESULTING VAPOR AND LIQUID FRACTIONS WITH LIQUID NITROGEN IN A RECTIFYING ZONE TO SEPARATE THE NITROGEN AS A VAPOR FRACTION AND THE METHANE AS A LIQUID FRACTION, VAPORIZING A PORTION OF THE LIQUID FRACTION IN HEAT EXCHANGE WITH A PORTION OF THE NITROGEN VAPORS, THEREBY PRODUCING LIQUID NITROGEN FOR REFLUX IN THE RECTIFYING ZONE, AND UTILIZING THE REMAINING VAPOR AND LIQUID FRACTIONS FOR COOLING THE GAS BEING TREATED IN SAID SECOND AND FIRST HEAT EXCHANGE ZONES.
Claim 2
Dependent Claim
140 words
A PROCESS FOR TREATMENT OF GASEOUS HYDROCARBON MIXTURES CONTAINING A SUBSTANTIAL PROPORTION OF NITROGEN AS A DILUENT COMPRISING REFRIGERATING A STREAM OF THE GAS UNDER SUPERATMOSPHERIC PRESSURE WITH EFFLUENT METHANE IN A FIRST HEAT EXCHANGE ZONE, LIQUEFYING THE NITROGEN AND METHANE OF THE GAS BY ADIABATIC EXPANSION THEREOF FOLLOWED BY HEAT EXCHANGE WITH COLDER NITROGEN VAPORS IN A SECOND HEAT EXCHANGE ZONE, REFLUXING THE RESULTING VAPOR AND LIQUID FRACTIONS WITH LIQUID NITROGEN IN A RECTIFYING ZONE TO SEPARATE THE NITROGEN AS A VAPOR FRACTION AND THE METHANE AS A LIQUID FRACTION, VAPORIZING A PORTION OF THE LIQUID FRACTION IN HEAT EXCHANGE WITH A PORTION OF THE NITROGEN VAPORS, THEREBY PRODUCING LIQUID NITROGEN FOR REFLUX IN THE RECTIFYING ZONE, AND UTILIZING THE REMAINING VAPOR AND LIQUID FRACTIONS FOR COOLING THE GAS BEING TREATED IN SAID SECOND AND FIRST HEAT EXCHANGE ZONES.
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) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |