US3027235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia oxidation process
Assignee: Phillips Petroleum Co
•
Filing: 1959-10-12
•
Granted: 1962-03-27
•
Expires: 1979-10-12
Abstract
No abstract record available.
Inventors
- 👤 Haven Clark G De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:04
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN THE PROCESS COMPRISING CATALYTICALLY REACTING AMMONIA WITH AN OXYGEN-CONTAINING GAS AT HIGH TEMPERATURE IN A CONVERSION ZONE TO FORM NITRIC OXIDES, COOLING AND CONDENSING GASEOUS EFFLUENT FROM SAID CONVERSION ZONE BY PASSING SAME THROUGH AN INDIRECT HEAT EXCHANGE STEP WITH SAID OXYGEN-CONTAINING GAS, AN INDIRECT HEAT EXCHANGE STEP WITH THE WASTE GASES DISCARDED FROM THE SYSTEM, AN INDIRECT HEAT EXCHANGE STEP WITH AN EXTRANEOUS COOLING MEDIUM, AND SEPARATING RESULTING CONDENSED LIQUID COMPRISING NITRIC ACID FROM UNCONDENSED GASES, THE STEP OF BY-PASSING A SUFFICIENT AMOUNT OF SAID GASEOUS EFFLUENT AROUND SAID HEAT EXCHANGE STEP WITH ALL OF SAID OXYGEN-CONTAINING GAS SO AS TO MAINTAIN THE OXYGEN-CONTAINING GAS ZONE IN SAID HEAT EXCHANGE STEP AT A TEMPERATURE BELOW ABOUT 620*C.
Claim 2
Dependent Claim
119 words
IN THE PROCESS COMPRISING CATALYTICALLY REACTING AMMONIA WITH AN OXYGEN-CONTAINING GAS AT HIGH TEMPERATURE IN A CONVERSION ZONE TO FORM NITRIC OXIDES, COOLING AND CONDENSING GASEOUS EFFLUENT FROM SAID CONVERSION ZONE BY PASSING SAME THROUGH AN INDIRECT HEAT EXCHANGE STEP WITH SAID OXYGEN-CONTAINING GAS, AN INDIRECT HEAT EXCHANGE STEP WITH THE WASTE GASES DISCARDED FROM THE SYSTEM, AN INDIRECT HEAT EXCHANGE STEP WITH AN EXTRANEOUS COOLING MEDIUM, AND SEPARATING RESULTING CONDENSED LIQUID COMPRISING NITRIC ACID FROM UNCONDENSED GASES, THE STEP OF BY-PASSING A SUFFICIENT AMOUNT OF SAID GASEOUS EFFLUENT AROUND SAID HEAT EXCHANGE STEP WITH ALL OF SAID OXYGEN-CONTAINING GAS SO AS TO MAINTAIN THE OXYGEN-CONTAINING GAS ZONE IN SAID HEAT EXCHANGE STEP AT A TEMPERATURE BELOW ABOUT 620*C.
References Cited (Backward Citations)
US2031215A
Cited
US2697652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |