Patent DE688093C successfully refreshed from Google Patents.
Patent US2953514A successfully refreshed from Google Patents.
US2953514A
Expired / Lapsed
US
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Method of reducing heat exchanger fouling
Assignee: ExxonMobil Oil Corp
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Filing: 1957-10-07
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Granted: 1960-09-20
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Expires: 1977-10-07
Abstract
No abstract record available.
Inventors
- 👤 Paul M Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:06
CPC Classifications
C; C10; C10G; C10G35/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN THE REFORMING OF NAPHTHA WHEREIN A CHANGE NAPHTHA IS CONTACTED WITH PARTICLE-FORM SOLID REFORMING CATALYST IN THE PRESENCE OF HYDROGEN AT REFORMING TEMPERATURE TO PRODUCE A REACTOR EFFLUENT HAVING A TEMPERATURE OF AT LEAST 700*F., AND WHEREIN THE AFORESAID REACTOR EFFLUENT IS IN INDIRECT HEAT EXCHANGE WITH ANOTHER FLUID AT TEMPERATURE BELOW ABOUT 500*F. IN THE INDIRECT HEAT EXCHANGER, THE IMPROVEMENT WHICH COMPRISES IN JECTING AT LEAST ONE AROMATIC HYDROCARBON HAVING A BOILING POINT OF AT LEAST 400*F. INTO SAID REACTOR EFFLUENT BEFORE THE TEMPERATURE THEREOF IS LOWERED BELOW ABOUT 500*F. THEREBY MAINTAINING THE PRESSURE DROP ACROSS SAID INDIRECT HEAT EXCHANGER SUBSTANTIALLY CONSTANT.
Claim 2
Dependent Claim
104 words
IN THE REFORMING OF NAPHTHA WHEREIN A CHANGE NAPHTHA IS CONTACTED WITH PARTICLE-FORM SOLID REFORMING CATALYST IN THE PRESENCE OF HYDROGEN AT REFORMING TEMPERATURE TO PRODUCE A REACTOR EFFLUENT HAVING A TEMPERATURE OF AT LEAST 700*F., AND WHEREIN THE AFORESAID REACTOR EFFLUENT IS IN INDIRECT HEAT EXCHANGE WITH ANOTHER FLUID AT TEMPERATURE BELOW ABOUT 500*F. IN THE INDIRECT HEAT EXCHANGER, THE IMPROVEMENT WHICH COMPRISES IN JECTING AT LEAST ONE AROMATIC HYDROCARBON HAVING A BOILING POINT OF AT LEAST 400*F. INTO SAID REACTOR EFFLUENT BEFORE THE TEMPERATURE THEREOF IS LOWERED BELOW ABOUT 500*F. THEREBY MAINTAINING THE PRESSURE DROP ACROSS SAID INDIRECT HEAT EXCHANGER SUBSTANTIALLY CONSTANT.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |