US3246478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for separating low-boiling gas mixtures
Assignee: Union Carbide Corp
•
Filing: 1963-04-08
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Granted: 1966-04-19
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Henry C Kornemann
- 👤 Anton E Hittl
- 👤 Koehn Helmut
- 👤 Plante Lyle J La
- 👤 Richard L Shaner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:12
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0203; F25J1/0205; F25J1/0002; F25J1/0012; F25J1/0015; F25J1/0017; F25J1/003; F25J1/0047; F25J1/005; F25J1/006; F25J1/007; F25J1/0072; F25J1/0204; F25J1/0228; F25J1/0234; F25J1/0235; F25J1/0236; F25J1/0243; F25J1/0244; F25J1/0245; F25J1/0279; F25J1/0285; F25J1/0288; F25J3/00; F25J3/02; F25J3/04; F25J3/04151; F25J3/04163; F25J3/04169; F25J3/04175; F25J3/04187; F25J3/04193; F25J3/04218; F25J3/04224; F25J3/04248; F25J3/04278; F25J3/04284; F25J3/0429; F25J3/04296; F25J3/04303; F25J3/04321; F25J3/04406; F25J3/04412; F25J3/04763; F25J3/04769; F25J3/04812; F25J2210/00; F25J2210/02; F25J2245/00; F25J2245/40; F25J2245/42; F25J2245/50; F25J2270/00; F25J2270/14; F25J2270/42; F25J2270/90; F25J2290/00; F25J2290/62; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A PROCESS FOR THE SEPARATION OF A GAS MIXTURE BY LOW TEMPERATURE RECTIFICATION INTO LOWER AND HIGHER BOILING COMPONENTS COMPRISING PROVIDING A PRESSURIZED GAS MIXTURE FEED STREAM, COOLING THE FEED STREAM, RECTIFYING THE COOLED FEED STREAM IN A RECTIFICATION ZONE HAVING A HIGH PRESSURE STAGE AND A LOW PRESSURE STAGE FOR SEPARATING THE GAS MIXTURE INTO COMPONENTS, WITHDRAWING AT LEAST ONE SEPARATED GAS PHASE COMPONENT FROM SAID RECTIFICATION ZONE, WARMING THE WITHDRAWN SEPARATED GAS PHASE COMPNOENT BY HEAT EXCHANGE WITH SAID FEED STREAM, LIQUIEFYING SAID SEPARATED GAS PHASE COMPONENT EXTERNALLY OF SAID RECTIFICATION ZONE, RETURNING AT LEAST PAR TOF THE SO LIQUEFIED COMPONENT TO SAID RECTIFICATION ZONE, AND WITHDRAWING AT LEAST ONE SEPARATED LIQUID PHASE COMPONENT FROM THE RECTIFICATION ZONE FOR USE AS A PRODUCT STREAM, THE AMOUNT OF GAS PHASE COMPONENT WITHDRAWN, LIQUEFIED, AND RETURNED TO THE RECTIFICATION ZONE BEING SUFFICIENT TO RESTORE THE REFRIGERATION REMOVED IN THE WITHDRAWN LIQUID PHASE PRODUCT STREAM, IN PROCESS IRREVERSIBILITIES, AND IN HEAT INLEAK.
Claim 2
Dependent Claim
161 words
A PROCESS FOR THE SEPARATION OF A GAS MIXTURE BY LOW TEMPERATURE RECTIFICATION INTO LOWER AND HIGHER BOILING COMPONENTS COMPRISING PROVIDING A PRESSURIZED GAS MIXTURE FEED STREAM, COOLING THE FEED STREAM, RECTIFYING THE COOLED FEED STREAM IN A RECTIFICATION ZONE HAVING A HIGH PRESSURE STAGE AND A LOW PRESSURE STAGE FOR SEPARATING THE GAS MIXTURE INTO COMPONENTS, WITHDRAWING AT LEAST ONE SEPARATED GAS PHASE COMPONENT FROM SAID RECTIFICATION ZONE, WARMING THE WITHDRAWN SEPARATED GAS PHASE COMPNOENT BY HEAT EXCHANGE WITH SAID FEED STREAM, LIQUIEFYING SAID SEPARATED GAS PHASE COMPONENT EXTERNALLY OF SAID RECTIFICATION ZONE, RETURNING AT LEAST PAR TOF THE SO LIQUEFIED COMPONENT TO SAID RECTIFICATION ZONE, AND WITHDRAWING AT LEAST ONE SEPARATED LIQUID PHASE COMPONENT FROM THE RECTIFICATION ZONE FOR USE AS A PRODUCT STREAM, THE AMOUNT OF GAS PHASE COMPONENT WITHDRAWN, LIQUEFIED, AND RETURNED TO THE RECTIFICATION ZONE BEING SUFFICIENT TO RESTORE THE REFRIGERATION REMOVED IN THE WITHDRAWN LIQUID PHASE PRODUCT STREAM, IN PROCESS IRREVERSIBILITIES, AND IN HEAT INLEAK.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |