US3870476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for performing catalytic endothermic reactions
Assignee: MARSCH HANS#DIETER
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Filing: 1973-08-09
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Granted: 1975-03-11
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Expires: 1993-08-09
Abstract
Abstract A pressure vessel for catalytic endothermic reactions in the upper portion of which is a supporting plate for a plurality of open ended shell tubes within which are reaction tubes. The reaction tubes are spaced from the shell tubes by fins affording an annular space. The reaction tubes are either supported by the supporting plate or bear against the bottom head of the vessel through upright sleeves. Catalyst-free gas feed tubes connect to the upper ends of the reaction tubes and catalyst-free gas discharge tubes connect to the lower ends. In one form, the discharge tubes extend through the bottom head of the vessel into a heat exchanger vessel, the top wall of which is formed by the bottom head of the pressure vessel. The supporting plate is supported by detachable tie rods.
Inventors
- 👤 Hans-Dieter Marsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:06
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0229; B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; B01J8/062; C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/384; C07; C07C; C07C4/00; C07C4/02; C07C4/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
172 words
A DEVICE FOR THE REFORMING OF GASEOUS HYDROCARBONS MIXED WITH STEAM BY A HEATING GAS, SAID HYDROCARBONS AND HEATING GAS BEING UNDER PRESSURE OF MORE THAN 5 ATM.G. COMPRISING IN COMBINATION A VERTICALLY DISPOSED INTERNALLY INSULATED PRESSURE VESSEL, A SUPPORTING PLATE IN THE UPPER PORTION OF SAID VESSEL IN ESSENTIALLY GASTIGHT CONNECTION WITH THE INNER INSULATED WALL THEREOF, SAID SUPPORTING PLATE HAVING A PLURALITY OF APERTURES, HEATING GAS INLET AND OUTLET MEANS FOR SAID VESSEL, OPEN ENDED SHELL TUBES FITTING SAID SUPPORTED PLATE APERTURES RESPECTIVELY, AND SEAL WELDED THEREIN TO BE SUPPORTED BY SAID PLATE, AND HAVING THEIR LOWER ENDS DISPOSED IN THE LOWER PART OF SAID VESSEL, A CATALYST-CONTAINING REACTION TUBE IN EACH SHELL TUBE AND SPACED FROM THE WALLS THEREOF TO ENABLE PASSAGE OF HEATING GAS THERETHROUGH, MEANS FOR SUPPORTING SAID REACTION TUBES ON SAID SUPPORTING PLATE AND WITHIN SAID SHELL TUBES, CATALYST-FREE GAS FEED TUBES EXTENDING TO THE UPPER INLET ENDS OF SAID REACTION TUBES, AND CATALYST-FREE GAS DISCHARGE TUBES CONNECTED TO THE LOWER ENDS OF SAID REACTION TUBES.
Claim 2
Independent Claim
172 words
A DEVICE FOR THE REFORMING OF GASEOUS HYDROCARBONS MIXED WITH STEAM BY A HEATING GAS, SAID HYDROCARBONS AND HEATING GAS BEING UNDER PRESSURE OF MORE THAN 5 ATM.G. COMPRISING IN COMBINATION A VERTICALLY DISPOSED INTERNALLY INSULATED PRESSURE VESSEL, A SUPPORTING PLATE IN THE UPPER PORTION OF SAID VESSEL IN ESSENTIALLY GASTIGHT CONNECTION WITH THE INNER INSULATED WALL THEREOF, SAID SUPPORTING PLATE HAVING A PLURALITY OF APERTURES, HEATING GAS INLET AND OUTLET MEANS FOR SAID VESSEL, OPEN ENDED SHELL TUBES FITTING SAID SUPPORTED PLATE APERTURES RESPECTIVELY, AND SEAL WELDED THEREIN TO BE SUPPORTED BY SAID PLATE, AND HAVING THEIR LOWER ENDS DISPOSED IN THE LOWER PART OF SAID VESSEL, A CATALYST-CONTAINING REACTION TUBE IN EACH SHELL TUBE AND SPACED FROM THE WALLS THEREOF TO ENABLE PASSAGE OF HEATING GAS THERETHROUGH, MEANS FOR SUPPORTING SAID REACTION TUBES ON SAID SUPPORTING PLATE AND WITHIN SAID SHELL TUBES, CATALYST-FREE GAS FEED TUBES EXTENDING TO THE UPPER INLET ENDS OF SAID REACTION TUBES, AND CATALYST-FREE GAS DISCHARGE TUBES CONNECTED TO THE LOWER ENDS OF SAID REACTION TUBES.
Claim 3
Independent Claim
172 words
A device for the reforming of gaseous hydrocarbons mixed with steam by a heating gas, said hydrocarbons and heating gas being under pressure of more than 5 atm.g. comprising in combination a vertically disposed internally insulated pressure vessel, a supporting plate in the upper portion of said vessel in essentially gastight connection with the inner insulated wall thereof, said supporting plate having a plurality of apertures, heating gas inlet and outlet means for said vessel, open ended shell tubes fitting said supporting plate apertures respectively, and seal welded therein to be supported by said plate, and having their lower ends disposed in the lower part of said vessel, a catalyst-containing reaction tube in each shell tube and spaced from the walls thereof to enable passage of heating gas therethrough, means for supporting said reaction tubes on said supporting plate and within said shell tubes, catalyst-free gas feed tubes extending to the upper inlet ends of said reaction tubes, and catalyst-free gas discharge tubes connected to the lower ends of said reaction tubes.
Claim 4
Independent Claim
172 words
A device for the reforming of gaseous hydrocarbons mixed with steam by a heating gas, said hydrocarbons and heating gas being under pressure of more than 5 atm.g. comprising in combination a vertically disposed internally insulated pressure vessel, a supporting plate in the upper portion of said vessel in essentially gastight connection with the inner insulated wall thereof, said supporting plate having a plurality of apertures, heating gas inlet and outlet means for said vessel, open ended shell tubes fitting said supporting plate apertures respectively, and seal welded therein to be supported by said plate, and having their lower ends disposed in the lower part of said vessel, a catalyst-containing reaction tube in each shell tube and spaced from the walls thereof to enable passage of heating gas therethrough, means for supporting said reaction tubes on said supporting plate and within said shell tubes, catalyst-free gas feed tubes extending to the upper inlet ends of said reaction tubes, and catalyst-free gas discharge tubes connected to the lower ends of said reaction tubes.
Claim 5
Dependent Claim
32 words
A device as claimed in claim 1, characterized in that lugs connected to said reaction tubes rest on the upper face of said plate and constitute means for supporting the reaction tubes.
Claim 6
Dependent Claim
90 words
A device as claimed in claim 1, characterized in that said gas discharge tubes penetrate individually and without mechanical contact through the bottom head of said vessel, welded caps securing each tube to said vessel, means providing a heat exchanger vessel outside of said pressure vessel and through which said discharge tubes extend to serve as heat exchanger tubes, the bottom head of said pressure vessel providing the upper wall of said heat exchanger vessel, and means providing inlet and outlet nozzles for cooling fluid in said heat exchanger vessel.
Claim 7
Dependent Claim
45 words
A device as claimed in claim 3, characterized in that said supporting plate is arranged above the reaction tubes, said catalyst-free gas feed tubes are connected to the upper ends of said reaction tubes and are coiled in the upper part of said shell tubes.
Claim 8
Dependent Claim
64 words
A device as claimed in claim 3, characterized in that a sleeve is provided as a rest for the lower end of each reaction tube, the lower end of said sleeve bearing against the bottom head of said pressure vessel, and a centering ring secured to the pressure vessel for holding each sleeve in position, the gas discharge tubes extending through said sleeves respectively.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |