US2905608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of catalyst materials with high energy radiations
Assignee: Dow Chemical Co
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Filing: 1955-12-29
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Granted: 1959-09-22
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Charles R Noddings
- 👤 William E Miller
- 👤 Theodore C Engelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:20
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A PROCESS FOR DEHYDROGENATING UNSASTURATED HYDROCARBON TO FORM CONJUGATED DIOLEFINS, WHEREIN A NORMAL OLEFIN CONTAINING FROM 4 TO 6 CARBON ATOMS AND HAVING AT LEAST 4 CARBONS ATOMS IN THE UNSATURATED CHAIN IN THE MOLECULE IN ADMIXTURE, WITH STEAM AT TEMPERATURES BETWEEN 500* AND 700* C. IS DEHYDROGENATED IN THE PRESENCE OF A CALCIUM NICKEL PHOSPHATE CATALYST TO FORM A CORRESPONDING CONJUGATED DIOLEFIN, THE STEP WHICH CONSIST IN CARRYING OUT THE DEHYDROGENATION IN THE PRESENCE OF A CALCIUM NICKEL PHOISPHATE CATALYST WHICH HAS BEEN SUBJECTED TO IONIZING IRRADIATION WITH GRAMMA RAYS FROM COBALT 60 AT AN INTENSITY OF FROM 100 TO 500,000 R.E.P. PER HOUR FOR A TOTAL DOSAGE CORRESPONDING TO FROM 0.5X10**6 TO 20X10**6 R.E.P. TO BRING THE SELECTIVELY OF SAID CATALYST FOR DEHYDROGENATING THE OLEFIN TO PRODUCE A CONJUGATED DIOLEFIN TO A VALUE BETWEEN 75 AND 95 PERCENT, BASED ON THE OLEFIN CONSUMED IN THE REACTION.
Claim 2
Dependent Claim
149 words
IN A PROCESS FOR DEHYDROGENATING UNSASTURATED HYDROCARBON TO FORM CONJUGATED DIOLEFINS, WHEREIN A NORMAL OLEFIN CONTAINING FROM 4 TO 6 CARBON ATOMS AND HAVING AT LEAST 4 CARBONS ATOMS IN THE UNSATURATED CHAIN IN THE MOLECULE IN ADMIXTURE, WITH STEAM AT TEMPERATURES BETWEEN 500* AND 700* C. IS DEHYDROGENATED IN THE PRESENCE OF A CALCIUM NICKEL PHOSPHATE CATALYST TO FORM A CORRESPONDING CONJUGATED DIOLEFIN, THE STEP WHICH CONSIST IN CARRYING OUT THE DEHYDROGENATION IN THE PRESENCE OF A CALCIUM NICKEL PHOISPHATE CATALYST WHICH HAS BEEN SUBJECTED TO IONIZING IRRADIATION WITH GRAMMA RAYS FROM COBALT 60 AT AN INTENSITY OF FROM 100 TO 500,000 R.E.P. PER HOUR FOR A TOTAL DOSAGE CORRESPONDING TO FROM 0.5X10**6 TO 20X10**6 R.E.P. TO BRING THE SELECTIVELY OF SAID CATALYST FOR DEHYDROGENATING THE OLEFIN TO PRODUCE A CONJUGATED DIOLEFIN TO A VALUE BETWEEN 75 AND 95 PERCENT, BASED ON THE OLEFIN CONSUMED IN THE REACTION.
References Cited (Backward Citations)
GB665263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |