Patent US3898295A successfully refreshed from Google Patents.
US3898295A
Expired / Lapsed
US
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Reaction apparatus for carrying out catalytic reactions in several stages
Assignee: Everllence SE
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Filing: 1973-04-25
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Granted: 1975-08-05
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Expires: 1993-04-25
Abstract
Abstract A multistage reaction apparatus for carrying out exothermic or endothermic catalytic reactions comprises a plurality of separate stages which are arranged sequentially within the reaction vessel and consecutively passed through by the reaction gas. Each stage includes a separately removable case filled with a catalyst, and a gas cooler in the form of a heat exchanger mounted downstream of the case. The catalysts of the individual stages may be different as to their quantity and/or nature. Each heat exchanger represents a controllable partial cooling circuit and all of the exchangers are interconnected by a common circulation system serving to balance out larger temperature variations and to supply the partial circuits. The common circuit, including a main heat exchanger, may comprise a pump mounted in the return branch or branches of the circuit and the partial circuits or exchangers are controlled by valves or three-way control members and may also each comprise a pump. In the case of carrying out endothermic reactions, the cooling devices are replaced by appropriate heating systems.
Inventors
- 👤 Oskar Wanka
- 👤 Friedrich Gutlhuber
- 👤 Cedomil Persic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:30
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00132; B01J2208/00168; B01J2208/00256; B01J2208/0053; B01J2208/00548
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
222 words
A reaction apparatus for carrying out catalytic reactions in several stages, comprising a housing having a first end with a reaction gas inlet and an opposite second end with a reaction gas discharge, a plurality of catalyst-containing removable casings extending across said housing arranged in spaced locations between said inlet and said discharge and arranged to permit reaction gas flow therethrough, an auxiliary heat exchanger cooler located downstream of each casing and extending across said housing for the flow of reaction gas therethrough, a main heat exchanger cooler adjacent to said exterior of said housing, a supply conduit for a heat exchange medium having a boiling point over 100* at atmospheric pressure connected to said main heat exchanger cooler, a separate conduit connected to each of sAid auxiliary heat exchanger coolers for the separate circulation of a portion of the heat exchange medium through each auxiliary heat exchanger, each said separate conduit having a valve, a main return flow conduit, connected to said main heat exchange cooler, and an auxiliary heat exchange conduit connected between each of said auxiliary heat exchangers and said return flow conduit to said main heat exchanger cooler, an auxiliary heat exchanger circulating pump connected to each auxiliary heat exchanger for separately circulating the heat exchange medium therethrough, and a main circulating pump connected to said supply conduit.
Claim 2
Dependent Claim
222 words
A reaction apparatus for carrying out catalytic reactions in several stages, comprising a housing having a first end with a reaction gas inlet and an opposite second end with a reaction gas discharge, a plurality of catalyst-containing removable casings extending across said housing arranged in spaced locations between said inlet and said discharge and arranged to permit reaction gas flow therethrough, an auxiliary heat exchanger cooler located downstream of each casing and extending across said housing for the flow of reaction gas therethrough, a main heat exchanger cooler adjacent to said exterior of said housing, a supply conduit for a heat exchange medium having a boiling point over 100* at atmospheric pressure connected to said main heat exchanger cooler, a separate conduit connected to each of sAid auxiliary heat exchanger coolers for the separate circulation of a portion of the heat exchange medium through each auxiliary heat exchanger, each said separate conduit having a valve, a main return flow conduit, connected to said main heat exchange cooler, and an auxiliary heat exchange conduit connected between each of said auxiliary heat exchangers and said return flow conduit to said main heat exchanger cooler, an auxiliary heat exchanger circulating pump connected to each auxiliary heat exchanger for separately circulating the heat exchange medium therethrough, and a main circulating pump connected to said supply conduit.
Claim 3
Dependent Claim
71 words
A reaction apparatus for carrying out catalytic reactions in several stages, according to claim 1, wherein there are two supply conduits arranged in parallel, each having a circulation pump, only one of said supply conduits being connected to said main heat exchanger and each supply conduit being connected to said auxiliary heat exchangers and including branch conduits connected between said supply conduits and the individual heat exchangers having three-way control valves.
Claim 4
Dependent Claim
25 words
A reaction apparatus for carrying out catalytic reactions in several stages, according to claim 1, wherein said auxiliary heat exchangers comprise demountable nests of tubes.
Claim 5
Dependent Claim
37 words
A reaction apparatus for carrying out catalytic reactions in several stages, according to claim 1, wherein said housing includes a removable cover aligned with each of said casings to permit removal of said casings from said housing.
Claim 6
Dependent Claim
33 words
A reaction apparatus for carrying out catalytic reactions in several stages, according to claim 1, wherein said catalyst containing removable casings are of varying sizes so as to accommodate different quantities of catalyst.
Claim 7
Dependent Claim
29 words
A reaction apparatus for carrying out catalytic reactions in several stages, according to claim 1, wherein at least some of said catalyst containing removable casings contain different catalyst materials.
Claim 8
Independent Claim
167 words
A METHOD OF OPERATING A REACTION VESSEL HAVING ALTERNATELY ARRANGED CONTAINERS OF CATALYSTS AND AUXILIARY HEAT EXCHANGERS AND A SEPARATE MAIN HEAT EXCHANGER CONNECTED TO THE AUXILIARY HEAT EXCHANGERS EACH HAVING ITSOWN CLOSED CIRCULATION SYSTEM, COMPRISING DIRECTING REACTION GASES THROUGH SAID VESSEL TO CAUSE THE GASES TO SUCCESSIVELY PASS THROUGH A PLURALITY OF CATALYST CONTAINERS AND AN AUXILIARY HEAT EXCHANGER IMMEDIATELY AFTEREACH CATALYST CONTAINER, CIRCULATING A COOLING MEDIUM THROUGH SAID MAIN HEAT EXCHANGER AND THROUGH A LINE COMMON TO EACH OF SAID AUXILIARY HEAT EXCHANGERS, CIRCULATING THE COOLING MEDIUM THROUGH EACH CLOSED AUXILIARY HEAT EXCHANGER, PERIODICALLY CIRCULATING A PORTION OF THE COOLING MEDIUM FROM THE LINE COMMON TO EACH HEAT EXCHANGER SEPARATELY INTO EACH HEAT EXCHANGER, AND PERIODICALLY RETURNINGA PORTION OF THE MEDIUM FROM EACH AUXILIARY HEAT EXCHANGER TO A COMMON LINE TO SAID MAIN HEAT EXCHANGER, AND CONTROLLING THE RATE OF FLOW OF THE COOLING MEDIUM IN EACH HEAT EXCHANGER AND SAID MAIN HEAT EXCHANGER IN ORDER TO PROVIDE DESIRED COOLING IN EACH AUXILIARY HEAT EXCHANGER.
Claim 9
Independent Claim
167 words
A METHOD OF OPERATING A REACTION VESSEL HAVING ALTERNATELY ARRANGED CONTAINERS OF CATALYSTS AND AUXILIARY HEAT EXCHANGERS AND A SEPARATE MAIN HEAT EXCHANGER CONNECTED TO THE AUXILIARY HEAT EXCHANGERS EACH HAVING ITSOWN CLOSED CIRCULATION SYSTEM, COMPRISING DIRECTING REACTION GASES THROUGH SAID VESSEL TO CAUSE THE GASES TO SUCCESSIVELY PASS THROUGH A PLURALITY OF CATALYST CONTAINERS AND AN AUXILIARY HEAT EXCHANGER IMMEDIATELY AFTEREACH CATALYST CONTAINER, CIRCULATING A COOLING MEDIUM THROUGH SAID MAIN HEAT EXCHANGER AND THROUGH A LINE COMMON TO EACH OF SAID AUXILIARY HEAT EXCHANGERS, CIRCULATING THE COOLING MEDIUM THROUGH EACH CLOSED AUXILIARY HEAT EXCHANGER, PERIODICALLY CIRCULATING A PORTION OF THE COOLING MEDIUM FROM THE LINE COMMON TO EACH HEAT EXCHANGER SEPARATELY INTO EACH HEAT EXCHANGER, AND PERIODICALLY RETURNINGA PORTION OF THE MEDIUM FROM EACH AUXILIARY HEAT EXCHANGER TO A COMMON LINE TO SAID MAIN HEAT EXCHANGER, AND CONTROLLING THE RATE OF FLOW OF THE COOLING MEDIUM IN EACH HEAT EXCHANGER AND SAID MAIN HEAT EXCHANGER IN ORDER TO PROVIDE DESIRED COOLING IN EACH AUXILIARY HEAT EXCHANGER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |