US3315475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freezing out contaminant methane in the recovery of hydrogen from industrial gases
Assignee: Conch International Methane Ltd
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Filing: 1964-06-15
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Granted: 1967-04-25
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Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Harmens Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:50
CPC Classifications
F; F17; F17C; F17C9/00; F17C9/02; F17C9/04; C; C01; C01B; C01B3/00; C01B3/50; C01B3/508; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0219; F25J3/0228; F25J3/0252; G; G03; G03G; G03G13/00; G03G13/06; G03G9/00; G03G9/16; F17C2221/00; F17C2221/01; F17C2221/012; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/037; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2265/00; F17C2265/01; F17C2265/015; F25J2205/00; F25J2205/20; F25J2205/30; F25J2205/50; F25J2210/00; F25J2210/12; F25J2210/14; F25J2210/62; F25J2220/00; F25J2220/60; F25J2220/66; F25J2230/00; F25J2230/20; F25J2230/30; F25J2240/00; F25J2240/02; F25J2270/00; F25J2270/04; F25J2270/90; F25J2270/904; F25J2280/00; F25J2280/30; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y10; Y10S; Y10S62/00; Y10S62/931; Y10S62/932
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
PROCESS FOR THE RECOVERY OF HYDROGEN FROM INDUSTRIAL FEED GASES SUCH AS COKE-OVEN GAS, COMPRISING THE STEPS OF (A) PARTIALLY LIQUEFYING THE FEED GAS, (B) SEPARATING THE PARTLY LIQUEFIED FEED GAS INTO A GASEOUS FRACTION AND A LIQUID FRACTION, (C) SUB-COOLING A SEPARATE SUPPLY OF LIQUEFIED NATURAL GAS, (D) WASHING SAID GASEOUS FRACTION IN THE SUB-COOLED LIQUEFIED NATURAL GAS IN AN ABSORBER AND THEREBY RECOVERING HYDROGEN AS A MAJOR VOLATILE CONSTITUENT, CONTAMINATED ONLY BY MINOR AMOUNTS OF METHANE, (E) COMBINING SAID LIQUID FRACTION WITH THE LIQUID ABSORBER BOTTOM PRODUCT FROM STEP (D), (F) PASSING THE COMBINED LIQUIDS FROM STEP (E) IN HEATEXCHANGE RELATIONSHIP WITH THE INCOMING FEED GAS IN STEP (A) TO PARTIALLY LIQUEFY SAME, (G) EXPANDING SAID METHANE-CONTAMINATED HYDROGEN LEAVING THE ABSORBER TO FREEZE OUT THE CONTAMINATING METHANE AS A SEPARATE SOLID PRODUCT, AND (H) USING THE EXPANDED, METHANE-FREE HYDROGEN OBTAINED FOR FURTHER SUB-COOLING THE LIQUEFIED NATURAL GAS.
Claim 2
Dependent Claim
149 words
PROCESS FOR THE RECOVERY OF HYDROGEN FROM INDUSTRIAL FEED GASES SUCH AS COKE-OVEN GAS, COMPRISING THE STEPS OF (A) PARTIALLY LIQUEFYING THE FEED GAS, (B) SEPARATING THE PARTLY LIQUEFIED FEED GAS INTO A GASEOUS FRACTION AND A LIQUID FRACTION, (C) SUB-COOLING A SEPARATE SUPPLY OF LIQUEFIED NATURAL GAS, (D) WASHING SAID GASEOUS FRACTION IN THE SUB-COOLED LIQUEFIED NATURAL GAS IN AN ABSORBER AND THEREBY RECOVERING HYDROGEN AS A MAJOR VOLATILE CONSTITUENT, CONTAMINATED ONLY BY MINOR AMOUNTS OF METHANE, (E) COMBINING SAID LIQUID FRACTION WITH THE LIQUID ABSORBER BOTTOM PRODUCT FROM STEP (D), (F) PASSING THE COMBINED LIQUIDS FROM STEP (E) IN HEATEXCHANGE RELATIONSHIP WITH THE INCOMING FEED GAS IN STEP (A) TO PARTIALLY LIQUEFY SAME, (G) EXPANDING SAID METHANE-CONTAMINATED HYDROGEN LEAVING THE ABSORBER TO FREEZE OUT THE CONTAMINATING METHANE AS A SEPARATE SOLID PRODUCT, AND (H) USING THE EXPANDED, METHANE-FREE HYDROGEN OBTAINED FOR FURTHER SUB-COOLING THE LIQUEFIED NATURAL GAS.
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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |