US4944996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separating element
Assignee: CARBONE LORRAINE NORTH AMERICA
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Filing: 1988-12-06
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Granted: 1990-07-31
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Expires: 2008-12-06
Abstract
Abstract The invention relates to a support intended to receive a mineral membrane for separation procedures, and processes for the production thereof. The support is formed by a carbon-carbon composite material of small thickness, which is mechanically strong and which is of a porous texture suited to the mineral membrane. It is produced by adjusting the porous texture of a carbon-carbon material.
Inventors
- 👤 Jean-Michel Bauer
- 👤 Jacques Maire
- 👤 Maurice Verna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:03
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0039; B01D67/0041; B01D67/00411; B01D67/0067; B01D67/0072; B01D69/00; B01D69/04; B01D69/06; B01D69/10; B01D69/108; B01D71/00; B01D71/02; B01D71/021; C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C04B38/00; C04B38/0022; B01D2325/00; B01D2325/04; B01D2325/24; C04B2111/00; C04B2111/00474; C04B2111/00793; C04B2111/00801; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/249957; Y10T428/249981; Y10T428/30
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
44 words
A separating element comprising a porous mineral membrane sintered to the face of a carbon-carbon composite material of small thickness permitting high permeability, which is of a strength adapted to resist bursting and which is of a porous texture suited to the mineral membrane.
Claim 2
Dependent Claim
44 words
A separating element comprising a porous mineral membrane sintered to the face of a carbon-carbon composite material of small thickness permitting high permeability, which is of a strength adapted to resist bursting and which is of a porous texture suited to the mineral membrane.
Claim 3
Dependent Claim
35 words
A separating element according to claim 1, wherein the carbon-carbon composite material comprises a carbon matrix and a substrate selected from the group consisting of porous carbon felts, cloths and fibers alone or in association.
Claim 4
Dependent Claim
15 words
A separating element according to claim 1 or 2 in the form of a tube.
Claim 5
Dependent Claim
15 words
A separating element according to claim 1 or 2 in the form of a plate.
Claim 6
Dependent Claim
18 words
A separating element according to claim 1 or 2, wherein said thickness is about 0.5 to 2 mm.
Claim 7
Dependent Claim
21 words
A separating element according to claim 1 or 2, wherein the bursting strength of said composite is at least 50 bars.
Claim 8
Dependent Claim
19 words
A support according to claim 1 or 2, wherein the porosity of said composite is about 30 to 40%.
Claim 9
Dependent Claim
48 words
In a separating element comprising a porous mineral membrane sintered to the face of a support, the improvement wherein said support comprises a carbon-carbon composite of small thickness permitting high permeability, of a strength adapted to resist bursting, and having a porous texture suited to the mineral membrane.
Claim 10
Dependent Claim
48 words
In a separating element comprising a porous mineral membrane sintered to the face of a support, the improvement wherein said support comprises a carbon-carbon composite of small thickness permitting high permeability, of a strength adapted to resist bursting, and having a porous texture suited to the mineral membrane.
Claim 11
Dependent Claim
64 words
A process for the production of a separating element comprising the steps of forming a carbon-carbon composite support from a fibrous carbon textile material by shaping said material, bonding said fibers with carbon to make the material rigid, and adjusting the porosity of said material, depositing on said support a mineral membrane of desired porosity and bonding said support and mineral membrane by sintering.
Claim 12
Dependent Claim
64 words
A process for the production of a separating element comprising the steps of forming a carbon-carbon composite support from a fibrous carbon textile material by shaping said material, bonding said fibers with carbon to make the material rigid, and adjusting the porosity of said material, depositing on said support a mineral membrane of desired porosity and bonding said support and mineral membrane by sintering.
Claim 13
Dependent Claim
24 words
A process according to claim 9, wherein said adjusting step is effected by impregnation of the textile with a carbonisable material, followed by carbonising.
Claim 14
Dependent Claim
16 words
A process according to claim 10, wherein said impregnation and carbonisation are repeated at least once.
Claim 15
Dependent Claim
19 words
A process according to claim 9, wherein said adjusting step is effected by depositing carbon from the vapour phase.
Claim 16
Dependent Claim
18 words
A process according to claim 12, additionally comprising impregnating the textile with a carbonisable material, followed by carbonising.
Claim 17
Dependent Claim
30 words
A process according to claim 10, wherein the carbonisable material is selected from the group consisting o furanic resins, pitches and mixtures of pitch and furfural, catalysed with ethyl sulphate.
Claim 18
Dependent Claim
32 words
A process according to claim 12, wherein the carbonisable material is selected from the group consisting o phenolic and furanic resins, pitches and mixtures of pitch an furfural, catalysed with ethyl sulphate.
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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |