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US 4,268,278 AGranted
Inorganic anisotropic hollow fibers
AssigneeMonsanto Company
InventorsEmerick J. Dobo, Tommy E. Graham
Life of this patent
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Abstract
Essentially inorganic monolithic hollow fibers having a radially anisotropic internal void volume wall structure. Process for the production of such fibers. Apparatus and processes using such fibers.
Claims10
A process comprising
- (a) preparing a solution of an organic fiber-forming polymer, containing, in a uniformly dispersed form, a sinterable inorganic material;
- (b) extruding the inorganic material-containing polymer solution through a hollow fiber spinneret;
- (c) forming a polymeric precursor hollow fiber, laden with the inorganic material, having a radially anisotropic internal void volume wall structure;
- (d) treating the polymeric precursor hollow fiber to remove the organic polymer;
- and
- (e) sintering the resulting inorganic material;
- provided that steps (d) and (e) are conducted under conditions that maintain a radially anisotropic internal void volume wall structure in the hollow fiber.
4 more elements
Dependencies are inferred from the claim text.