US4737269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst loading hopper
Assignee: Catalyst Technology Inc
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Filing: 1986-05-15
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Granted: 1988-04-12
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Expires: 2006-05-15
Abstract
Abstract A catalyst loading hopper suitable for positioning in vertical position above a reactor vessel, having an inlet at its upper end, a catalyst outlet at its lower end and a diagonally-disposed baffle extending downwardly across the hopper but terminating short of one of the walls of the hopper and a weir adjustably arranged so as to control the flow of catalysts through the hopper. There is a dust outlet at the top of the hopper, which may be connected to a conduit so as to draw dust away from the upper end of the hopper and a screen at the bottom of the hopper to separate the catalyst from any fines or undersized catalyst particles. The screen feeds into a catalyst outlet which, in turn, feeds into a conduit, which extends into the reactor vessel so as to allow arrangement of the cleaned catalyst pellets in layers in the vessel. A gas nozzle opens in the wall of the hopper and allows dust to be blown from the catalyst pellets and through the dust outlet to be collected in a suitable filter. The fines and undersized catalyst portions can be drawn through a fines outlet and conduit to a suitable receptacle.
Inventors
- 👤 Michael E. Bischoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:55
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/003; B07; B07B; B07B9/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
168 words
Apparatus for separating dust and fines from solid catalyst pellets and for loading said catalyst pellets into a catalytic reactor, which comprises: A. a hopper, suitable for arrangement in vertical position above said reactor, which comprises: 1. four vertical walls, an upper end and a lower end; 2. an inlet means at said upper end for reception of solid catalyst pellets; 3. a catalyst outlet at said lower end; 4. a first diagonally-disposed baffle attached to three of said vertical walls and extending downwardly across said hopper but terminating short of the fourth vertical wall; 5. a gas nozzle opening in the wall of said hopper, below the level of said diagonally-disposed baffle for introducing gas into said hopper; 6. a dust outlet at the upper end of said hopper; 7. a screen disposed diagonally and downwardly across the lower end of said hopper and feeding into said catalyst outlet; 8. a tray located beneath said screen for receiving fines and undersized catalyst pellets falling through said screen;
Claim 2
Dependent Claim
168 words
Apparatus for separating dust and fines from solid catalyst pellets and for loading said catalyst pellets into a catalytic reactor, which comprises: A. a hopper, suitable for arrangement in vertical position above said reactor, which comprises: 1. four vertical walls, an upper end and a lower end; 2. an inlet means at said upper end for reception of solid catalyst pellets; 3. a catalyst outlet at said lower end; 4. a first diagonally-disposed baffle attached to three of said vertical walls and extending downwardly across said hopper but terminating short of the fourth vertical wall; 5. a gas nozzle opening in the wall of said hopper, below the level of said diagonally-disposed baffle for introducing gas into said hopper; 6. a dust outlet at the upper end of said hopper; 7. a screen disposed diagonally and downwardly across the lower end of said hopper and feeding into said catalyst outlet; 8. a tray located beneath said screen for receiving fines and undersized catalyst pellets falling through said screen;
Claim 3
Dependent Claim
67 words
a fines outlet in said tray; and B. a first conduit connectable to said catalyst outlet and extending into the reactor for loading catalyst pellets in layers within said reactor; C. a second conduit connectable to said dust outlet for drawing off dust from the upper end of said hopper; and D. a pressure reduction means located outside of said hopper and connected to said second conduit.
Claim 4
Dependent Claim
67 words
a fines outlet in said tray; and B. a first conduit connectable to said catalyst outlet and extending into the reactor for loading catalyst pellets in layers within said reactor; C. a second conduit connectable to said dust outlet for drawing off dust from the upper end of said hopper; and D. a pressure reduction means located outside of said hopper and connected to said second conduit.
Claim 5
Dependent Claim
22 words
Apparatus, as defined in claim 1, which includes a receptacle for receipt of fines and undersized catalyst pellets from said fines outlet.
Claim 6
Dependent Claim
22 words
Apparatus, as defined in claim 2, which includes a third conduit, connectable to said fines outlet and which communicates with said receptacle.
Claim 7
Dependent Claim
25 words
Apparatus, as defined in claim 3, in which said third conduit is connected to a pressure reduction means located between said hopper and said receptacle.
Claim 8
Dependent Claim
17 words
Apparatus, as defined in claim 1, in which said first diagonally-disposed baffle is a perforated steel plate.
Claim 9
Dependent Claim
27 words
Apparatus, as defined in claim 1, which includes a plate joined to the lower end of said diagonally-disposed baffle and to three of the four vertical walls.
Claim 10
Dependent Claim
18 words
Apparatus, as defined in claim 6, in which said gas nozzle opens into the wall above said plate.
Claim 11
Dependent Claim
12 words
Apparatus, as defined in claim 6, in which said plate is perforated.
Claim 12
Dependent Claim
19 words
Apparatus, as defined in claim 8, in which said baffle is in the form of a solid steel plate.
Claim 13
Dependent Claim
18 words
Apparatus, as defined in claim 8, in which said gas nozzle opens into the wall below said baffle.
Claim 14
Dependent Claim
30 words
Apparatus, as defined in claim 1, which includes a weir, located near the bottom edge of said first diagonallydisposed baffle for governing the flow of catalyst pellets through the hopper.
Claim 15
Dependent Claim
25 words
Apparatus, as defined in claim 11, which includes adjustable means for said weir, whereby the relationship of the weir to said baffle can be adjusted.
Claim 16
Dependent Claim
22 words
Apparatus, as defined in claim 1, which includes a hinge connected to the lower part of said hopper and to said tray.
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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) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |