Patent US3918918A successfully refreshed from Google Patents.
US3918918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic reactor
Assignee: Lummus Technology LLC
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Filing: 1974-08-08
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Granted: 1975-11-11
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Expires: 1994-08-08
Abstract
Abstract A catalytic reactor for two stage reactions but involving only a single catalyst bed having an intermediate impervious seal dividing such bed into two distinct reaction zones, and including an interstage feed-effluent heat exchanger and a preliminary mixing stage. By providing a single reactor unit capable of all of the noted functions, problems with thermal expansion, high pressure drops and excessive residence time are minimized.
Inventors
- 👤 Harold B Kohn
- 👤 George Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:03
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00265; B01J2208/00283; B01J2208/00548; B01J2208/00557
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
217 words
A CATALYTIC REACTOR FOR TWO STAGE REACTIONS IN SINGLE CATALYST BED WIT INTERESTAGE FEED-EFFUENT HEAT EXCHANGE COMPRISING: AN UPRIGHT, CYLINDRICAL REACTOR VESSEL, AN ELONGATED ANNULAR CATALYST BED SECURED IN BUT SPACED FROM SAID VESSEL BY ANNULAR PERFORATED WALL MEANS IN COAXIAL ALIGNAMENT WITH THAT OF SAID VESSEL, A HEAT EXCHANGER HAVING A SHELL AND A TUBE SIDE ADJACENT ONE END OF SAID BED, SEAL MEANS WITHIN SAID CATALYST BED AND DIVIDING SAME INTO A LOWER FIRST STAGE AND AN UPPER SECOND STAGE, MEANS INCLUDING REACTANT FLUID DELLUCTOR MEANS DIVIDING THE ANNULUS DEFINED BY SAID BED INTO UPPER AND LOWER FEED CHAMBERS CORRESPONDING TO SAID FIRST AND SECOND STAGES, A FLUID INLET COMMUNICATING WITH THE INLET ON ONE SIDE OF SAID HEAT EXVHANGER, A FLUID OUTLET FROM SAID SIDE OF SAID HEAT EXCHANGER MEANS COMMUNICSTING WITH SAID FLUID OUTLETT OF SAID ONE SIDE OF SAID HEAT EXCHANGER WITH SAID LOWER FIRST STAGE, MEANS BETWEEN SAID FIRST STAGE AND SAID VESSEL FOR RECEIVING FIRST STAGE EFFUENT AND COMMUNICATING WITH THE INLET ON THE OTHER SIDE OF SAID EXCHANGER, MEANS COMMUNICATING WITH THE OUTLET OF SAID OTHER SIDE OF SAID HEAT EXCHANGER AND SAID UPPER SECOND STAGE, REACTOR EFFUENT OUTLET, AND MEANS BETWEEN SAID SECOND STAGE AND SAID VESSEL FORRECEIVING SECOND STAGE EFFUENT AND COMMUNICATING WITH SAID REACTOR EFFUENT OUTLET.
Claim 2
Dependent Claim
217 words
A CATALYTIC REACTOR FOR TWO STAGE REACTIONS IN SINGLE CATALYST BED WIT INTERESTAGE FEED-EFFUENT HEAT EXCHANGE COMPRISING: AN UPRIGHT, CYLINDRICAL REACTOR VESSEL, AN ELONGATED ANNULAR CATALYST BED SECURED IN BUT SPACED FROM SAID VESSEL BY ANNULAR PERFORATED WALL MEANS IN COAXIAL ALIGNAMENT WITH THAT OF SAID VESSEL, A HEAT EXCHANGER HAVING A SHELL AND A TUBE SIDE ADJACENT ONE END OF SAID BED, SEAL MEANS WITHIN SAID CATALYST BED AND DIVIDING SAME INTO A LOWER FIRST STAGE AND AN UPPER SECOND STAGE, MEANS INCLUDING REACTANT FLUID DELLUCTOR MEANS DIVIDING THE ANNULUS DEFINED BY SAID BED INTO UPPER AND LOWER FEED CHAMBERS CORRESPONDING TO SAID FIRST AND SECOND STAGES, A FLUID INLET COMMUNICATING WITH THE INLET ON ONE SIDE OF SAID HEAT EXVHANGER, A FLUID OUTLET FROM SAID SIDE OF SAID HEAT EXCHANGER MEANS COMMUNICSTING WITH SAID FLUID OUTLETT OF SAID ONE SIDE OF SAID HEAT EXCHANGER WITH SAID LOWER FIRST STAGE, MEANS BETWEEN SAID FIRST STAGE AND SAID VESSEL FOR RECEIVING FIRST STAGE EFFUENT AND COMMUNICATING WITH THE INLET ON THE OTHER SIDE OF SAID EXCHANGER, MEANS COMMUNICATING WITH THE OUTLET OF SAID OTHER SIDE OF SAID HEAT EXCHANGER AND SAID UPPER SECOND STAGE, REACTOR EFFUENT OUTLET, AND MEANS BETWEEN SAID SECOND STAGE AND SAID VESSEL FORRECEIVING SECOND STAGE EFFUENT AND COMMUNICATING WITH SAID REACTOR EFFUENT OUTLET.
Claim 3
Dependent Claim
19 words
The reactor as claimed in claim 1 and additionally comprising a second fluid inlet adjacent said lower feed chamber.
Claim 4
Dependent Claim
35 words
The reactor as claimed in claim 1, wherein the means connecting said other side with said lower Feed chamber comprise a conduit having an outer surface shaped so as to define said fluid deflector means.
Claim 5
Dependent Claim
31 words
The reactor as claimed in claim 1, and additionally comprising access means in said vessel adjacent the top and bottom of said bed for the respective charging and discharging of catalyst.
Claim 6
Dependent Claim
24 words
The reactor as claimed in claim 1, and additionally comprising a plurality of said seal means periodically spaced along the length of said bed.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |