EP0047640A2
Expired / Lapsed
EP
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Inorganic monolithic hollow fibers, process for their production, and apparatus comprising them
Assignee: Monsanto Co
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Filing: 1981-09-04
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Granted: —
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Expires: 2001-09-04
Abstract
Abstract Essentially inorganic monolithic hollow fibers have at least one segment self-supportingly disposed as a coil. Coil shapes may be spiral, helical or conical helical. Processes are provided for making coiled hollow fibers. Apparatus are provided using coiled hollow fibers.
Inventors
- 👤 Roger Sherman Otstot
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 01:52
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/08; B01D53/00; B01D53/22; B01D63/00; B01D63/02; B01D63/021; B01D63/0231; B01D63/0232; B01D63/025; B01D67/00; B01D67/0039; B01D67/0041; B01D67/00411; B01D71/00; B01D71/02; B01D71/0215; B01D71/05; B22; B22F; B22F3/00; B22F3/002; C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C04B35/62236; D; D01; D01D; D01D5/00; D01D5/24; H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M10/3918; B01D2313/00; B01D2313/34; B01D2313/345; B22F3/10; B22F3/105; B22F2003/1053; B22F2998/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2918; Y10T428/2922; Y10T428/2925; Y10T428/2973; Y10T428/2975; Y10T428/2976
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
17 words
An essentially inorganic brittle monolithic hollow fiber having at least one segment self-supportingly disposed as a coil.
Claim 2
Dependent Claim
17 words
An essentially inorganic brittle monolithic hollow fiber having at least one segment self-supportingly disposed as a coil.
Claim 3
Dependent Claim
35 words
A hollow fiber according to Claim 1 which comprises inorganic material selected from the group consisting of-brittle metals, brittle metal alloys, metal oxides, metal carbides, metal borides, metal nitrides, semi-metal compounds, ceramics, cermets and metcers.
Claim 4
Dependent Claim
28 words
A hollow fiber according to either Claim 1 or Claim 2, where the hollow fiber has an outer diameter of from about 100 microns to about 10,000 microns.
Claim 5
Dependent Claim
23 words
A hollow fiber according to any of Claims 1 to 3, where said coil is substantially spiral, substantially conical helical or substantially helical.
Claim 6
Dependent Claim
20 words
A hollow fiber according to any of Claims 1 to 4, having a radically anisotropic internal void volume wall structure.
Claim 7
Dependent Claim
37 words
A hollow fiber according to any of Claims 1 to 4, having a substantially isotropic wall structure and where the inorganic material forming the wall has a density of at least 97 percent of its theoretical density.
Claim 8
Dependent Claim
35 words
A hollow fiber according to any of Claims 1 to 6, where said coil has a plurality of turns of substantially equal loop diameter and a pitch substantially equal to the hollow fiber outer diameter.
Claim 9
Dependent Claim
21 words
A hollow fiber according to any of Claims 1 to 6, having more than one substantially distinct self-supportingly disposed coil-shaped segment.
Claim 10
Dependent Claim
19 words
A hollow fiber according to Claim 8, where said coil-shaped segments are substantially spiral and are substantially parallelly disposed.
Claim 11
Dependent Claim
20 words
A hollow fiber according to Claim 8, where the coil-shaped segments are substantially conical helical and are substantially concentrically disposed.
Claim 12
Dependent Claim
86 words
A process comprising a) extruding through a hollow fiber spinneret a solution of an organic fiber-forming polymer containing, in uniformly dispersed form, sinterable inorganic material; b) forming a polymeric precursor hollow fiber laden with the sinterable inorganic material; c) shaping at least one segment of the polymeric precursor hollow fiber into a coil configuration; d) treating the coil-shaped polymeric precursor hollow fiber to remove the organic polymer; and e) sintering the resulting inorganic material forming an inorganic monolithic hollow fiber with at least one coil-shaped segment.
Claim 13
Dependent Claim
86 words
A process comprising a) extruding through a hollow fiber spinneret a solution of an organic fiber-forming polymer containing, in uniformly dispersed form, sinterable inorganic material; b) forming a polymeric precursor hollow fiber laden with the sinterable inorganic material; c) shaping at least one segment of the polymeric precursor hollow fiber into a coil configuration; d) treating the coil-shaped polymeric precursor hollow fiber to remove the organic polymer; and e) sintering the resulting inorganic material forming an inorganic monolithic hollow fiber with at least one coil-shaped segment.
Claim 14
Dependent Claim
18 words
A process according to Claim 11, where the said coil-shaped segment is substantially helical, spiral or conical helical.
Claim 15
Dependent Claim
22 words
A process according to either Claim ll.or Claim 12, where the resulting sintered inorganic material comprises a metal or brittle inorganic material.
Claim 16
Dependent Claim
32 words
A process according to Claim 13, where the brittle inorganic material is brittle metal, brittle metal alloy, ductile metal, metal oxide, metal carbide,.metal boride, metal nitride, semi-metal compound, ceramic, cermet or metcer.
Claim 17
Dependent Claim
14 words
A process according to Claim 14, where said resulting inorganic material is sodium beta-alumina.
Claim 18
Dependent Claim
38 words
In a battery having an alkali-metal electrode, a sulfur compound electrode and a solid electrolyte the improvement wherein the solid electrolyte comprises at least one essentially inorganic monolithic hollow fiber according to any of Claims 1 to 10.
References Cited (Backward Citations)
No citation records indexed.
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