US2938851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preventing corrosion of plant equipment
Assignee: Universal Oil Products Co
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Filing: 1956-02-10
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Granted: 1960-05-31
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Expires: 1976-02-10
Abstract
No abstract record available.
Inventors
- 👤 Russell F Stedman
- 👤 Ralph B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:52
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
A METHOD OF REDUCING CORROSION OF PLANT EQUIPMENT IN A REFORMING PROCESS UTILIZING A PLATINUM-CONTAINING CATALYST, WHEREIN HOT EFFLUENT REACTOR PRODUCTS CONTAIN A CORROSIVE CHLORIDE COMPOUND AND WHEREIN A HYDROGEN STREAM SEPARATED FROM SAID EFFLUENT PRODUCTS IS RECYCLED TO SAID REACTOR, WHICH COMPRISES PARTLY COOLING SAID EFFLUENT PRODUCTS TO A TEMPERATURE OF FROM ABOUT 500*F. TO ABOUT 700*F., ADMIXING ETHYLENE DIAMINE AND WATER WITH SAID PARTLY COOLED EFFULENT PRODUCTS, THEREAFTER FURTHER COOLING THE EFFULENT PRODUCTS TO BELOW 400*F., SEPARATING THEREFROM A HYDROGEN STREAM SUBSTANTIALLY FREE OF SAID ETHYLENE DIAMINE, RECYCLING SAID HYDROGEN STREAM TO SAID REACTOR, AND SEPARATELY WITHDRAWING LIQUID EFFLUENT PRODUCTS AND A WATER FRACTION CONTAINING ETHYLENE DIAMINE HYDROCHLORIDE.
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) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |