US2859090A
Expired / Lapsed
US
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Treatment of fluids for removal of hydrogen cyanide
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-02-07
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Granted: 1958-11-04
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Expires: 1975-02-07
Abstract
No abstract record available.
Inventors
- 👤 Jean H Karchmer
- 👤 Marjorie T Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:59
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/54; C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD FOR REMOVING A MAJOR PORTION OF HYDROGEN CYANIDE AND ONLY A MINOR PORTION OF HYDROGEN SULPHIDE FROM CATALYTICALLY CRACKED FLUIDS CONTAINING HYDROGEN CYANIDE HYDROGEN SULPHIDE, AMMONIA DNA MOISTURE COMPRISING REACTING SAID FLUIDS WITH A WATER SOLUBLE ALIPHATIC ALDEHYDE, THE MOL RATIO OF THE ALDEHYDE ION TO THE CYANIDE ION BEING IN THE RANGE OF ABOUT 1:1 TO ABOUT 6:1 TO FORM A CYANIDE-ALDEHYDE REACTION PRODUCT, SAID REACTION MEDIUM HAVING A PH IN THE RANGE OF ABOUT 8 TO ABOUT 11.
Claim 2
Independent Claim
82 words
A METHOD FOR REMOVING A MAJOR PORTION OF HYDROGEN CYANIDE AND ONLY A MINOR PORTION OF HYDROGEN SULPHIDE FROM CATALYTICALLY CRACKED FLUIDS CONTAINING HYDROGEN CYANIDE HYDROGEN SULPHIDE, AMMONIA DNA MOISTURE COMPRISING REACTING SAID FLUIDS WITH A WATER SOLUBLE ALIPHATIC ALDEHYDE, THE MOL RATIO OF THE ALDEHYDE ION TO THE CYANIDE ION BEING IN THE RANGE OF ABOUT 1:1 TO ABOUT 6:1 TO FORM A CYANIDE-ALDEHYDE REACTION PRODUCT, SAID REACTION MEDIUM HAVING A PH IN THE RANGE OF ABOUT 8 TO ABOUT 11.
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |