Patent US3607000A successfully refreshed from Google Patents.
US3607000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal bypass for a chemical reactor
Assignee: Gulf Research and Development Co
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Filing: 1969-04-17
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Granted: 1971-09-21
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Expires: 1989-04-17
Abstract
Abstract In a reactor containing a fixed bed of catalyst an internal bypass for reactants is provided to bypass the portion of the bed which is contaminated and offers the greatest pressure drop without changing the direction of flow of the reactants. The internal bypass is of particular advantage in a hydrodesulfurization process utilizing very small catalyst particles wherein pressure drop is critical and wherein an external bypass which changes flow direction might impart a greater pressure drop than it conserves by avoiding a contaminated section of catalyst.
Inventors
- 👤 Thomas J Beal
- 👤 Robert E Donaldson
- 👤 William R Lehrian
- 👤 Elwood E Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:51
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0446; B01J8/0449; B01J8/0453; B01J8/0492; C; C10; C10G; C10G49/00; C10G49/002
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
21 words
The reactor of claim 1 wherein said downstream opening comprises a bottom closure plate and lateral slots in said conduit means.
Claim 2
Dependent Claim
24 words
The reactor of claim 1 including porous means of relatively small pressure drop in the interior of said catalyst bed surrounding said downstream opening.
Claim 3
Dependent Claim
13 words
The reactor of claim 1 wherein said closure means is a rupture disk.
Claim 4
Dependent Claim
12 words
The reactor of claim 1 wherein said closure means is a valve.
Claim 5
Dependent Claim
29 words
The reactor of claim 1 including a plurality of said conduit means extending from the upstream end of the catalyst bed and terminating in the interior of the bed.
Claim 6
Dependent Claim
20 words
The reactor of claim 6 wherein the individual conduit means terminate at differing positions along the depth of the bed.
Claim 7
Dependent Claim
122 words
In a process wherein reactants are passed through a reactor containing means to retain a fixed catalyst bed therein, a catalyst bed having an upstream end which tends to acquire deposits which increase the pressure drop through said bed and a downstream end on said means, the improvement for distributing reactants within the catalyst bed which comprises actuating bypass conduit means upon an increase in pressure drop through said bed, said conduit means being supported in said reactor and extending from above the upstream end of said bed to the interior of said bed to bypass at least a portion of said reactants directly from the upstream of the catalyst bed through said conduit means to the interior of said catalyst bed.
Claim 8
Dependent Claim
20 words
The process of claim 8 wherein bypassed reactants discharge from said conduit means in a lateral direction within said bed.
Claim 9
Dependent Claim
21 words
The process of claim 8 wherein said bypass means is actuated by failure of a rupture disk in said conduit means.
Claim 10
Dependent Claim
20 words
The process of claim 8 wherein said bypass means if actuated by means of a valve in said conduit means.
Claim 11
Dependent Claim
26 words
The process of claim 8 wherein separate portions of reactants are bypassed through a plurality of conduit means each extending to the interior of said bed.
Claim 12
Dependent Claim
18 words
The process of claim 12 wherein said plurality of conduit means extend to differing depths in said bed.
References Cited (Backward Citations)
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |