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US3786682A
Expired / Lapsed
US
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Catalyst sampling apparatus
Assignee: Universal Oil Products Co
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Filing: 1972-12-22
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Granted: 1974-01-22
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Expires: 1992-12-22
Abstract
Abstract Catalyst is withdrawn from an operating high pressure reactor through a tube extending into the catalyst bed from a blocked off sample receiver. The large diameter tube contains a small diameter line which delivers a gas stream of such high velocity that it acts as a valve to prevent catalyst from entering the opening in the larger tube. A temporary reduction in the gas flow allows catalyst to fall into the large tube, through which it falls by gravity to the receiver. The end of the gas line is preferably near the opening in the catalyst withdrawal tube.
Inventors
- 👤 G Winter
- 👤 L Stine
- 👤 Ven J Vande
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:03
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/20; B; B01; B01J; B01J8/00; B01J8/0015; B01J8/002
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
225 words
A sampling apparatus for withdrawing solid particles from a bed of the particles contained in a vessel, which apparatus comprises: a. a particle withdrawal tube which extends from a point outside the vessel to a point within the vessel at which it is desired to take samples, said particle withdrawal tube having an opening which allows the entrance of the particles into the tube; b. a valve means located on the outer end of the particle withdrawal tube, said valve means being capable of preventing the escape of gas when closed, and of allowing the free flow of the particles when open; c. a support gas inlet line, said gas line being at least partially contained within the particle withdrawal tube and having an opening located within the particle withdrawal tube to thereby allow gas to flow from the gas line into the particle withdrawal tube and then out of the opening in the particle withdrawal tube and into the vessel; d. a valve means located on the support gas line, said valve means used to regulate the flow of gas into the line and to reduce the gas flow when it is desired to take samples, the flow at other times being at such a high rate that particles are prevented by the escaping gas from entering the opening in the particle withdrawal line.
Claim 2
Dependent Claim
225 words
A sampling apparatus for withdrawing solid particles from a bed of the particles contained in a vessel, which apparatus comprises: a. a particle withdrawal tube which extends from a point outside the vessel to a point within the vessel at which it is desired to take samples, said particle withdrawal tube having an opening which allows the entrance of the particles into the tube; b. a valve means located on the outer end of the particle withdrawal tube, said valve means being capable of preventing the escape of gas when closed, and of allowing the free flow of the particles when open; c. a support gas inlet line, said gas line being at least partially contained within the particle withdrawal tube and having an opening located within the particle withdrawal tube to thereby allow gas to flow from the gas line into the particle withdrawal tube and then out of the opening in the particle withdrawal tube and into the vessel; d. a valve means located on the support gas line, said valve means used to regulate the flow of gas into the line and to reduce the gas flow when it is desired to take samples, the flow at other times being at such a high rate that particles are prevented by the escaping gas from entering the opening in the particle withdrawal line.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 wherein the support gas inlet line is contained within the particle withdrawal tube for at least the distance that the particle withdrawal tube extends into the vessel.
Claim 4
Dependent Claim
220 words
A sampling apparatus for withdrawing quantities of solid catalyst from a pressurized reactor, which apparatus comprises: a. a catalyst withdrawal tube which extends from a point outside the reactor to a point within the reactor at which it is desired to take samples, said catalyst withdrawal tube having an opening which allows the Entrance of the particles into the tube; b. a valve means located on the outer end of the catalyst withdrawal tube, said valve means being capable of preventing the escape of gas when closed, and of allowing the free flow of the particles when open; c. a support gas inlet line, said gas line being at least partially contained within the catalyst withdrawal tube and having an opening located within the particle withdrawal tube to allow gas to flow from the gas line into the catalyst withdrawal tube, and then out of the opening in the catalyst withdrawal tube into the reactor; d. a valve means located on the support gas line, said valve means used to regulate the flow of pressurized gas into the line and to reduce the gas flow when it is desired to take samples, the flow at other times being at such a high rate that particles are prevented by the escaping gas from entering the opening in the particle withdrawal line.
Claim 5
Dependent Claim
220 words
A sampling apparatus for withdrawing quantities of solid catalyst from a pressurized reactor, which apparatus comprises: a. a catalyst withdrawal tube which extends from a point outside the reactor to a point within the reactor at which it is desired to take samples, said catalyst withdrawal tube having an opening which allows the Entrance of the particles into the tube; b. a valve means located on the outer end of the catalyst withdrawal tube, said valve means being capable of preventing the escape of gas when closed, and of allowing the free flow of the particles when open; c. a support gas inlet line, said gas line being at least partially contained within the catalyst withdrawal tube and having an opening located within the particle withdrawal tube to allow gas to flow from the gas line into the catalyst withdrawal tube, and then out of the opening in the catalyst withdrawal tube into the reactor; d. a valve means located on the support gas line, said valve means used to regulate the flow of pressurized gas into the line and to reduce the gas flow when it is desired to take samples, the flow at other times being at such a high rate that particles are prevented by the escaping gas from entering the opening in the particle withdrawal line.
Claim 6
Dependent Claim
32 words
The apparatus of claim 3 wherein the support gas inlet line is contained within the catalyst withdrawal tube for at least the distance that the catalyst withdrawal tube extends into the vessel.
Claim 7
Dependent Claim
16 words
The apparatus of claim 3 wherein the support gas inlet line carries a recycle gas stream.
Claim 8
Dependent Claim
20 words
The apparatus of claim 3 wherein the opening in the catalyst withdrawal tube is at the end of the tube.
Claim 9
Dependent Claim
20 words
The apparatus of claim 3 wherein the opening in the catalyst withdrawal tube is on the side of the tube.
Claim 10
Dependent Claim
14 words
The apparatus of claim 3 wherein the catalyst withdrawal tube is mounted substantially vertically.
References Cited (Backward Citations)
US3487695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |