Patent US3865555A successfully refreshed from Google Patents.
US3865555A
Expired / Lapsed
US
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Reactor for catalytic gas phase oxidation
Assignee: Rheinstahl AG
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Filing: 1973-06-07
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Granted: 1975-02-11
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Expires: 1993-06-07
Abstract
Abstract A reactor for catalytic gas phase oxidation includes a tube bundle of contact tubes extending between and having their respective ends seated in tube sheets in a vessel in which a reaction gas is passed through the tubes and a heat carrier is circulated around the exterior of the tubes. Each contact tube is filled with catalyst particles of relatively small size, and holding means are arranged in each tube end in order to hold the particles therein. The holding means comprise a layer or skein of wire gauze arranged adjacent each end and held in position by a clamping ring which may be formed as a spring ring which is engaged against the walls of the tube or a ring which engages in an annular notch of the tube. In some instances, the holding means are arranged in only one end of the tube, for example the bottom end.
Inventors
- 👤 Gunter Elebracht
- 👤 Gunter Siekmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:25
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; B01J8/067; B01J8/008; C; C07; C07C; C07C51/00; C07C51/16; C07C51/31; C07C51/313; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00212; B01J2208/00221; B01J2208/00796; B01J2208/00884; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
A reactor comprising first and second spaced tube sheets, a tube bundle of contact tubes extending between and having respective ends seated in said tube sheets, means for directing a heat carrier medium over the surfaces of said tube sheets in heat exchange relationship therewith, means for directing reaction gases through said contact tubes, coarse grain catalyst particles arranged in said contact tubes, said tubes having interior walls with an annular groove adjacent at least one end, and holding means arranged adjacent said at least one end of said tubes for retaining said catalyst particles therein and including a wire gauze skein ball disposed across said tube adjacent to and interiorly of said groove, and a clamping ring arranged at the exterior of said gauze in said groove and projecting into the interior of said tube for retaining the gauze in position therein.
Claim 2
Dependent Claim
143 words
A reactor comprising first and second spaced tube sheets, a tube bundle of contact tubes extending between and having respective ends seated in said tube sheets, means for directing a heat carrier medium over the surfaces of said tube sheets in heat exchange relationship therewith, means for directing reaction gases through said contact tubes, coarse grain catalyst particles arranged in said contact tubes, said tubes having interior walls with an annular groove adjacent at least one end, and holding means arranged adjacent said at least one end of said tubes for retaining said catalyst particles therein and including a wire gauze skein ball disposed across said tube adjacent to and interiorly of said groove, and a clamping ring arranged at the exterior of said gauze in said groove and projecting into the interior of said tube for retaining the gauze in position therein.
Claim 3
Dependent Claim
14 words
A reactor, according to claim 1, wherein said clamping ring has a rectangular cross-section.
Claim 4
Dependent Claim
21 words
A reactor according to claim 1, wherein said holding means are located only in the lower ends of said contact tubes.
Claim 5
Dependent Claim
19 words
A reactor according to claim 1, wherein said holding means are arranged in each end of said contact tubes.
Claim 6
Dependent Claim
109 words
A CONTACT TUBE FOR A CATALYST REACTOR COMPRISING A TUBULAR MEMBER ADAPTED TO BE SEATED IN A TUBE SHEET AT EACH END AND HAVING CATALYST PARTICLES ARRANGED THEREIN, SAID TUBULAR MEMBER HAVING AN INTERIOR WALL WITH AN ANNULAR GROOVE ADJACENT AT LEAST ONE END, AND HOLDING MEANS ARRANGED ADJACENT SAID AT LEAST ONE END OF SAID TUBULAR MEMBER FOR RETAINING PARTICLES THEREIN AND INCLUDING A WIRE GAUZE SKEIN DISPOSED ACROSS SAID TUBES ADJACENT TO AND EXTERIORLY END OF SAID GAUZE IN SAID GROOVE RING ARRANGED AT THE EXTERIOR END OF SAID GAUZE IN SAID GROOVE AND PROJECTING INTO THE INTERIOR OF SAID TUBE FOR RETAINING THE GAUZE IN POSITION.
Claim 7
Dependent Claim
109 words
A CONTACT TUBE FOR A CATALYST REACTOR COMPRISING A TUBULAR MEMBER ADAPTED TO BE SEATED IN A TUBE SHEET AT EACH END AND HAVING CATALYST PARTICLES ARRANGED THEREIN, SAID TUBULAR MEMBER HAVING AN INTERIOR WALL WITH AN ANNULAR GROOVE ADJACENT AT LEAST ONE END, AND HOLDING MEANS ARRANGED ADJACENT SAID AT LEAST ONE END OF SAID TUBULAR MEMBER FOR RETAINING PARTICLES THEREIN AND INCLUDING A WIRE GAUZE SKEIN DISPOSED ACROSS SAID TUBES ADJACENT TO AND EXTERIORLY END OF SAID GAUZE IN SAID GROOVE RING ARRANGED AT THE EXTERIOR END OF SAID GAUZE IN SAID GROOVE AND PROJECTING INTO THE INTERIOR OF SAID TUBE FOR RETAINING THE GAUZE IN POSITION.
Claim 8
Dependent Claim
45 words
A contact tube for a catalyst reactor according to claim 5, wherein said wire gauze skein comprises a ball of wire gauze filling the space of said tube exteriorly of said catalyst particles, said clamping ring comprising a split resilient ring engaged in said groove.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |