US3116342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage selective hydrogenation of acetylenes
Assignee: Imperial Chemical Industries Ltd
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Filing: 1960-06-06
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Granted: 1963-12-31
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Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Robinson Ralph Lozelu
- 👤 Smith William Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:06
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/08; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/44; B01J21/00; B01J21/02; B01J21/04; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A PROCESS FOR THE SELECTIVE HYDROGENATION OF ACETYLENES IN A GAS MIXTURE CONTAINING 8-45% HYDROGEN, 0.14% ACETYLENE, 20-45% ETHYLENE, UP TO 20% PROPYLENE, THE REST BEING SATURATED HYDROCARBONS WHICH COMPRISES A FIRST STAGE IN WHICH THE GAS MIXTURE TOGETHER WITH HYDROGEN WHICH IS IN EXCESS OF THAT REQUIRED TO HYDROGENATE THE ACETYLENES TO OLEFINES, IS PASSED, AT A TEMPERATURE OF 40 TO 200*C. OVER A CATALYST CONSISTING OF PALLADIUM SUPPORTED ON ALUMINA, CALCINED AT A TEMPERATURE OF 800 TO 1300*C., THE MEAN RADIUS OF THOSE PORES IS AT LEAST 200 ANGSTROM UNITS AND NOT MORE THAN ABOUT 1400 ANGSTROM UNITS, AND WHICH HAS A SURFACE AREA IN THE RANGE OF 5 TO 65 SQUARE METERS PER GRAM, AND A SECOND STAGE IN WHICH THE HYDROGEN CONTENT OF THE GAS LEAVING THE FIRST STAGE IS REDUCED TO ABOUT 2 TO 3 MOLES OF HYDROGEN PER MOLE OF ACETYLENES, AND THE GAS IS THEN PASSED AT A TEMPERATURE OF 40 TO 200*C. OVER A CATALYST CONSISTING OF PALLADIUM SUPPORTED ON A GAMMA-ALUMINA-CONTAINING SUPPORT.
Claim 2
Dependent Claim
171 words
A PROCESS FOR THE SELECTIVE HYDROGENATION OF ACETYLENES IN A GAS MIXTURE CONTAINING 8-45% HYDROGEN, 0.14% ACETYLENE, 20-45% ETHYLENE, UP TO 20% PROPYLENE, THE REST BEING SATURATED HYDROCARBONS WHICH COMPRISES A FIRST STAGE IN WHICH THE GAS MIXTURE TOGETHER WITH HYDROGEN WHICH IS IN EXCESS OF THAT REQUIRED TO HYDROGENATE THE ACETYLENES TO OLEFINES, IS PASSED, AT A TEMPERATURE OF 40 TO 200*C. OVER A CATALYST CONSISTING OF PALLADIUM SUPPORTED ON ALUMINA, CALCINED AT A TEMPERATURE OF 800 TO 1300*C., THE MEAN RADIUS OF THOSE PORES IS AT LEAST 200 ANGSTROM UNITS AND NOT MORE THAN ABOUT 1400 ANGSTROM UNITS, AND WHICH HAS A SURFACE AREA IN THE RANGE OF 5 TO 65 SQUARE METERS PER GRAM, AND A SECOND STAGE IN WHICH THE HYDROGEN CONTENT OF THE GAS LEAVING THE FIRST STAGE IS REDUCED TO ABOUT 2 TO 3 MOLES OF HYDROGEN PER MOLE OF ACETYLENES, AND THE GAS IS THEN PASSED AT A TEMPERATURE OF 40 TO 200*C. OVER A CATALYST CONSISTING OF PALLADIUM SUPPORTED ON A GAMMA-ALUMINA-CONTAINING SUPPORT.
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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |