US3958952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactor having a catalytic bed with upstream means for filtering solid contaminants
Assignee: Shell USA Inc
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Filing: 1974-05-06
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Granted: 1976-05-25
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Expires: 1994-05-06
Abstract
Abstract A process and apparatus for catalytic treatment of a material containing solid contaminants (in particular residue from hydrodesulfurization), the catalytic reactor being provided upstream of the catalyst bed with filter units small enough to be replaced via the reactor inlet, said filter units containing parallel void chambers alternately closed at top and bottom, respectively, (possibly by means of rupture discs), so that material to be filtered flows into a void chamber, through its wall which has filtering (and possibly also catalytic, e.g., demetallizing) properties, and then out of the next void chamber and onto the catalyst bed.
Inventors
- 👤 Adriaan J. J. van Ginneken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:39
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/005; B; B01; B01D; B01D46/00; B01D46/30; B01J; B01J8/00; B01J8/005; B01J8/006; B01J8/02; B01J8/0278
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
230 words
In an apparatus for the catalytic reaction of a material selected from the group consisting of gaseous and liquid materials and mixtures thereof said material containing solid contaminants, comprising a reactor having an upstream inlet and an outlet and containing at least one bed of catalyst and disposed in said reactor upstream of said catalyst bed a tray supporting a plurality of filter units for removing said contaminants from said material, the total surface area of the filter units being substantially higher than the cross sectional area of the reactor, the improvement comprising that said filter units are arranged and constructed on said tray for individual replacement via said reactor inlet and that each of said filter units comprises a number of concentrically disposed elongated chambers substantially co-axial with the reactor and having a top and bottom, which chambers alternately are void and contain contact bodies, all chambers being provided with permeable side walls, the void chambers being alternately (1) open at the top and closed at the bottom and (2) closed at the top and open at the bottom, and said void chambers (1) and (2) being separated from each other by the chambers containing contact bodies, said contact body-containing chambers being closed at both top and bottom, whereby a high filter surface area is available and the rate of pressure differential build-up across the filter units is slow.
Claim 2
Dependent Claim
230 words
In an apparatus for the catalytic reaction of a material selected from the group consisting of gaseous and liquid materials and mixtures thereof said material containing solid contaminants, comprising a reactor having an upstream inlet and an outlet and containing at least one bed of catalyst and disposed in said reactor upstream of said catalyst bed a tray supporting a plurality of filter units for removing said contaminants from said material, the total surface area of the filter units being substantially higher than the cross sectional area of the reactor, the improvement comprising that said filter units are arranged and constructed on said tray for individual replacement via said reactor inlet and that each of said filter units comprises a number of concentrically disposed elongated chambers substantially co-axial with the reactor and having a top and bottom, which chambers alternately are void and contain contact bodies, all chambers being provided with permeable side walls, the void chambers being alternately (1) open at the top and closed at the bottom and (2) closed at the top and open at the bottom, and said void chambers (1) and (2) being separated from each other by the chambers containing contact bodies, said contact body-containing chambers being closed at both top and bottom, whereby a high filter surface area is available and the rate of pressure differential build-up across the filter units is slow.
Claim 3
Dependent Claim
53 words
The apparatus of claim 1 including the further improvement wherein the void chambers are of substantially equal width, the chambers containing contact bodies are also of substantially equal width, and the ratio of the width of the void chambers to the width of the chambers containing contact bodies lies between 1:5 and 2:1.
Claim 4
Dependent Claim
239 words
In an apparatus for catalytic reaction of a material selected from the group consisting of gaseous or liquid materials and mixtures thereof, said material containing solid contaminants, comprising a reactor having an upstream inlet and an outlet and containing at least one bed of catalyst and disposed in said reactor upstream of said catalyst bed a tray supporting a plurality of filter units for removing said contaminants from said material, the total surface area of the reactor, the improvement wherein said filter units are arranged and constructed on said tray for individual replacement via said reactor inlet, said filter units having dimensions such as to allow introduction and removal thereof via the reactor inlet; and wherein each of said filter units comprises a number of concentrically disposed elongated chambers substantially co-axial with the reactor and having a top and bottom, which chambers alternately are void and contain contact bodies, all chambers being provided with permeable side walls, the void chambers being alternately (1) open at the top and closed at the bottom and (2) closed at the top and open at the bottom and said void chambers (1) and (2) being separated from each other by the chambers containing contact bodies, said contact bodies-containing chambers being closed at both top and bottom, and at least part of said void chambers being provided with means for opening when the pressure drop across the filter units reaches a predetermined upper limit.
Claim 5
Dependent Claim
239 words
In an apparatus for catalytic reaction of a material selected from the group consisting of gaseous or liquid materials and mixtures thereof, said material containing solid contaminants, comprising a reactor having an upstream inlet and an outlet and containing at least one bed of catalyst and disposed in said reactor upstream of said catalyst bed a tray supporting a plurality of filter units for removing said contaminants from said material, the total surface area of the reactor, the improvement wherein said filter units are arranged and constructed on said tray for individual replacement via said reactor inlet, said filter units having dimensions such as to allow introduction and removal thereof via the reactor inlet; and wherein each of said filter units comprises a number of concentrically disposed elongated chambers substantially co-axial with the reactor and having a top and bottom, which chambers alternately are void and contain contact bodies, all chambers being provided with permeable side walls, the void chambers being alternately (1) open at the top and closed at the bottom and (2) closed at the top and open at the bottom and said void chambers (1) and (2) being separated from each other by the chambers containing contact bodies, said contact bodies-containing chambers being closed at both top and bottom, and at least part of said void chambers being provided with means for opening when the pressure drop across the filter units reaches a predetermined upper limit.
Claim 6
Dependent Claim
17 words
The apparatus of claim 3 wherein the improvement further comprises that said opening means are breaking plates.
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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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |