Patent US3223746A successfully refreshed from Google Patents.
US3223746A
Expired / Lapsed
US
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High temperature heat exchange
Assignee: ExxonMobil Oil Corp
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Filing: 1962-12-28
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Granted: 1965-12-14
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Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 James D Hammond
- 👤 Murray J Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:26
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/005; F28F27/00; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/91; Y10S585/911; Y10S585/914; Y10S585/919; Y10S585/921
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
IN A PROCESS FOR THE THERMAL REACTION ENTIRELY IN THE VAPOR PHASE OF NORMALLY LIQUID MATERIAL AND A GAS AT A TEMPERATURE SUBSTANTIALLY ABOVE 900*F. WHEREIN SAID REACTANTS ARE AT LEAST PARTIALLY PREHEATED AND THE REACTION EFFLUENT IS COOLED BY HEAT EXCHANGE THEREBETWEEN, THE IMPROVEMENT WHICH COMPRISES VAPORIZING LIQUID IN A MIXED PHASE STREAM OF SAID NORMALLY LIQUID MATERIAL AND GAS BY HEATING IS A FIRST INDERICT HEAT EXCHANGER, INTRODUCING THE RESULTING WHOLLY GASEOUS STREAM INTO A SECOND INDIRECT HEAT EXCHANGER AT A TEMPERATURE LESS THAN ABOUT 650*F., HEATING SAID GASEOUS STREAM IN THE SECOND EXCHANGER BY THE TRANSFER OF HEAT FROM SAID REACTION EFFLUENT
Claim 2
Dependent Claim
105 words
IN A PROCESS FOR THE THERMAL REACTION ENTIRELY IN THE VAPOR PHASE OF NORMALLY LIQUID MATERIAL AND A GAS AT A TEMPERATURE SUBSTANTIALLY ABOVE 900*F. WHEREIN SAID REACTANTS ARE AT LEAST PARTIALLY PREHEATED AND THE REACTION EFFLUENT IS COOLED BY HEAT EXCHANGE THEREBETWEEN, THE IMPROVEMENT WHICH COMPRISES VAPORIZING LIQUID IN A MIXED PHASE STREAM OF SAID NORMALLY LIQUID MATERIAL AND GAS BY HEATING IS A FIRST INDERICT HEAT EXCHANGER, INTRODUCING THE RESULTING WHOLLY GASEOUS STREAM INTO A SECOND INDIRECT HEAT EXCHANGER AT A TEMPERATURE LESS THAN ABOUT 650*F., HEATING SAID GASEOUS STREAM IN THE SECOND EXCHANGER BY THE TRANSFER OF HEAT FROM SAID REACTION EFFLUENT
Claim 3
Dependent Claim
155 words
IN A PROCESS FOR THE THERMAL HYDRODEALKYLATION OF AN ALKYL AROMATIC HYDROCARBON ENTIRELY IN THE VAPOR PHASE AT A TEMPERATURE ABOVE ABOUT 1200*F. IN THE PRES ENCE OF HYDROGEN AT A PARTIAL PRESSURE OF AT LEAST ABOUT 200 P.S.I. WHEREIN SAID HYDROCARBON AND HYDROGEN REACTANTS ARE AT LEAST PARTIALLY PREHEATED AND THE HYDRODEALKYLATION EFFLUENT IS COOLED BY HEAT EXCHANGE THEREBETWEEN, THE IMPROVEMENT WHICH COMPRISES VAPORIZING LIQUID IN A MIXED PHASE STREAM OF SAID HYDROCARBON AND HYDROGEN BY HEATING IN A FIRST INDIRECT HEAT EXCHANGER, INTRODUCING THE RESULTING WHOLLY GASEOUS STREAM INTO A SECOND INDIRECT HEAT EXCHANGER AT A TEMPERATURE LESS THAN ABOUT 650*F., HEATING SAID GASEOUS STREAM INTO A SECOND EXCHANGER BY THE TRANSFER OF HEAT FROM SAID HYDRODEALKYLATION EFFLUENT WHICH IS THEREBY COOLED FROM A TEMPERATURE ABOVE 900*F. TO LESS THAN ABOUT 800*F., AND PASSING THE PARTIALLY COOLED HYDRODEALKYLATION EFFLUENT FROM THE SECOND EXCHANGER TO THE FIRST EXCHANGER TO HEAT SAID MIXED PHASE STREAM
Claim 4
Dependent Claim
155 words
IN A PROCESS FOR THE THERMAL HYDRODEALKYLATION OF AN ALKYL AROMATIC HYDROCARBON ENTIRELY IN THE VAPOR PHASE AT A TEMPERATURE ABOVE ABOUT 1200*F. IN THE PRES ENCE OF HYDROGEN AT A PARTIAL PRESSURE OF AT LEAST ABOUT 200 P.S.I. WHEREIN SAID HYDROCARBON AND HYDROGEN REACTANTS ARE AT LEAST PARTIALLY PREHEATED AND THE HYDRODEALKYLATION EFFLUENT IS COOLED BY HEAT EXCHANGE THEREBETWEEN, THE IMPROVEMENT WHICH COMPRISES VAPORIZING LIQUID IN A MIXED PHASE STREAM OF SAID HYDROCARBON AND HYDROGEN BY HEATING IN A FIRST INDIRECT HEAT EXCHANGER, INTRODUCING THE RESULTING WHOLLY GASEOUS STREAM INTO A SECOND INDIRECT HEAT EXCHANGER AT A TEMPERATURE LESS THAN ABOUT 650*F., HEATING SAID GASEOUS STREAM INTO A SECOND EXCHANGER BY THE TRANSFER OF HEAT FROM SAID HYDRODEALKYLATION EFFLUENT WHICH IS THEREBY COOLED FROM A TEMPERATURE ABOVE 900*F. TO LESS THAN ABOUT 800*F., AND PASSING THE PARTIALLY COOLED HYDRODEALKYLATION EFFLUENT FROM THE SECOND EXCHANGER TO THE FIRST EXCHANGER TO HEAT SAID MIXED PHASE STREAM
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |