US5376167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purifying device for hydrogen comprising a base made of an alloy of the same composition as that of the tubes
Assignee: IFP Energies nouvelles
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Filing: 1993-06-18
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Granted: 1994-12-27
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Expires: 2013-06-18
Abstract
Abstract A device for separating hydrogen from gaseous mixtures containing it or for purifying gaseous hydrogen, comprising an outer casing (2) fiIled with a plurality of tubes (3) made of a suitable palladium based alloy, which tubes are closed at one end (4). The tubes are fixed in substantially seal-tight manner, at the open end side (5), to a part at least of a base (6) made of a metal alloy, the composition of which is such that its expansion coefficient in hydrogen is substantially equal to that of the alloy of the tubes. The base can be integrally formed and made of the above-mentioned alloy, or it can comprise a ring of substantially the same composition as that of the tubes adhering thereto by way of an autogenous soldering.
Inventors
- 👤 Paul Broutin
- 👤 Andre Buisson
- 👤 Philippe Legoit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:44
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D63/00; B01D63/06; B01D63/069; C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B3/505; C01B2203/00; C01B2203/04; C01B2203/0405
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
125 words
A device for separating hydrogen in gaseous mixtures or for purifying gaseous hydrogen, comprising an outer casing (2) enclosing at least one tube (3) made of a hydrogen-permeable palladium base alloy, wherein at least one of the ends of the at least one tube (3) is fixed in a substantially sealtight manner to a part, at least, of a base (6) having at least one hole therein for enclosing said at least one end, said base being made of a metal alloy of a composition such that said metal alloy has an expansion coefficient in hydrogen substantially equal to that of the palladium-based alloy of the tube, said fixed tube having an external diameter less than the internal diameter of said at least one hole.
Claim 2
Independent Claim
125 words
A device for separating hydrogen in gaseous mixtures or for purifying gaseous hydrogen, comprising an outer casing (2) enclosing at least one tube (3) made of a hydrogen-permeable palladium base alloy, wherein at least one of the ends of the at least one tube (3) is fixed in a substantially sealtight manner to a part, at least, of a base (6) having at least one hole therein for enclosing said at least one end, said base being made of a metal alloy of a composition such that said metal alloy has an expansion coefficient in hydrogen substantially equal to that of the palladium-based alloy of the tube, said fixed tube having an external diameter less than the internal diameter of said at least one hole.
Claim 3
Dependent Claim
48 words
A device according to claim 1, comprising a plurality of tubes, wherein the base is made up of one single part which is substantially identical in composition to that of the alloy used to form the tubes, said tubes adhering to said base in a substantially sealtight manner.
Claim 4
Dependent Claim
76 words
A device according to claim 1, wherein the base comprises two parts, a first part (14) which is of substantially the same composition as said at least one tube and which encloses said at least one tube, and a second part which is metal or formed from a second alloy of different composition from that of the alloy forming the first part, said parts of the base adhering to one another in a substantially sealtight manner.
Claim 5
Dependent Claim
17 words
A device according to claim 3, wherein the two parts of the base adhere by brazing (16).
Claim 6
Dependent Claim
22 words
A device according to claim 3, wherein the base comprises at least one reinforcing member (13) which keeps it in the casing.
Claim 7
Dependent Claim
27 words
A device according to claim 1, wherein said at least one tube adheres to said base or part of the base by way of an autogenous soldering.
Claim 8
Dependent Claim
36 words
A device according to claim 1, wherein the base is fixed to the casing (2) in a substantially sealtight manner by at least one clamp (11) which grips at least one joint (10) of suitable composition.
Claim 9
Dependent Claim
29 words
A device according to claim 1, wherein the base is fixed to the casing (2) in a substantially sealtight manner by a soldering, brazing or any suitable fixing system.
Claim 10
Dependent Claim
36 words
A device according to claim 1, wherein said at least one tube (3) and part of the base or the base as a whole are made of an alloy containing 45 to 95% by weight palladium.
Claim 11
Dependent Claim
12 words
A device according to claim 9, wherein said alloy contains 65-90% palladium.
Claim 12
Dependent Claim
12 words
A device according to claim 9, wherein said alloy contains 70-80% palladium.
Claim 13
Dependent Claim
12 words
A device according to claim 9, wherein said alloy contains 74-79% palladium.
Claim 14
Dependent Claim
12 words
A device according to claim 12, wherein said palladium-based alloy comprises silver.
Claim 15
Dependent Claim
12 words
A device according to claim 9, wherein said palladium-based alloy comprises silver.
Claim 16
Dependent Claim
31 words
A device according claim 1, wherein said palladium based alloy comprises at least one metal selected from the group consisting of Ag, Sn, Sb, Ce, Ru, Rh, Cu, Au and Y.
Claim 17
Dependent Claim
16 words
A device according to claim 1, wherein the alloy comprises palladium and 20 to 30% silver.
Claim 18
Dependent Claim
35 words
A device according to claim 1, wherein said at least one tube contains at least one stiffening element to maintain the lateral rigidity under the temperature and pressure conditions to which the tubes are subjected.
Claim 19
Dependent Claim
12 words
A device according to claim 1, wherein said palladium-based alloy comprises silver.
Claim 20
Dependent Claim
41 words
A device according to claim 1, wherein said at least one tube having at least one end fixed in a substantially sealtight manner to a part, at least, of said base, is open-ended at said base and extends beyond said base.
Claim 21
Independent Claim
161 words
A device for separating hydrogen and gaseous mixtures or for purifying gaseous hydrogen, comprising an outer casing (2) enclosing at least one tube (3) made of an appropriate palladium-based alloy, wherein at least one of the ends of the at least one tube (3) is fixed in a substantially sealtight manner to a part, at least, of a base (6) made of a metal alloy having a composition such that said metal alloy has an expansion coefficient in hydrogen substantially equal to that of the palladium-based alloy of the tube and wherein the base comprises two parts, a first part (14), which is of substantially the same composition as said at least one tube and which encloses said at least one tube, and a second part, which is metal or formed from a second alloy of different composition from that of the alloy forming the first part, said parts of the base adhering to one another in a substantially sealtight manner.
Claim 22
Independent Claim
161 words
A device for separating hydrogen and gaseous mixtures or for purifying gaseous hydrogen, comprising an outer casing (2) enclosing at least one tube (3) made of an appropriate palladium-based alloy, wherein at least one of the ends of the at least one tube (3) is fixed in a substantially sealtight manner to a part, at least, of a base (6) made of a metal alloy having a composition such that said metal alloy has an expansion coefficient in hydrogen substantially equal to that of the palladium-based alloy of the tube and wherein the base comprises two parts, a first part (14), which is of substantially the same composition as said at least one tube and which encloses said at least one tube, and a second part, which is metal or formed from a second alloy of different composition from that of the alloy forming the first part, said parts of the base adhering to one another in a substantially sealtight manner.
Claim 23
Dependent Claim
17 words
A device according to claim 20, wherein the two parts of the base adhere by brazing (16).
Claim 24
Dependent Claim
22 words
A device according to claim 20, wherein the base comprises at least one reinforcing member (13) which keeps it in the casing.
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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) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |