Composite Ceramic Hollow Fibers, Method for Their Production and Their Use
OwnerMirjam Kilgus, Thomas Schiestelinventors
Life of this patent
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Abstract
Composites comprising at least a hollow fiber for the gas- or liquid-transporting ceramic material whose outer surface is in contact with the outer surface of the same or another hollow fiber and the contact sites are joined by sintering are described. Additional composites include at least one hollow fiber from gas- or liquid-transporting ceramic material and at least a connection element for feed or discharge of fluids on at least one of the ends, in which hollow fibers are joined to the connection element by sintering. The composites can be used for recovery of gases from gas mixtures.
Claims24
1-23. (canceled)
A hollow fiber membrane composite comprising at least one hollow fiber membrane comprising gas-permeable or liquid-permeable ceramic material, other than oxygen-permeable ceramic materials, the gas-permeable or liquid-permeable ceramic material having an outer surface, the outer surface being in contact with the outer surface of the same hollow fiber membrane or another hollow fiber membrane so as to have contact sites, the contact sites being joined by sintering.
A hollow fiber membrane according to claim 1, characterized by the fact that the gas-permeable or liquid-permeable ceramic material is an oxide ceramic.
A composite comprising at least one hollow fiber membrane from gas-permeable or liquid-permeable ceramic material and a connection element on both ends thereof for feed or discharge of fluids, in which the at least one hollow fiber membrane is connected to the connection elements by sintering.
A method for producing a composite having at least one hollow fiber membrane comprising gas-permeable or liquid-permeable ceramic material, other than oxygen-permeable ceramic materials, the gas-permeable or liquid-permeable ceramic material having an outer surface, the outer surface being in contact with the outer surface of the same hollow fiber membrane or another hollow fiber membrane so as to have contact sites, the contact sites being joined by sintering, the method comprising:
- a) preparing a green hollow fiber by extrusion of a composition containing a ceramic, especially oxide ceramic, or a precursor for a ceramic, in addition to a polymer, through an annular nozzle in known fashion;
- b) generation of a green composite from one or more of the green hollow fibers produced in step a) by production of contacts between the outer surface or surfaces of the green hollow fiber or fibers;
- and
- c) heat treatment of the green composite produced in step b) in order to eliminate the polymer and to form a contact between the ceramic hollow fibers as well as optionally the ceramic, especially oxide ceramic.
A method for producing a composite comprising at least one hollow fiber membrane from gas-permeable or liquid-permeable ceramic material and a connection element on both ends thereof for feed or discharge of fluids, in which the at least one hollow fiber membrane is connected to the connection elements by sintering, the method comprising:
- a) preparing green hollow fiber by extrusion of a composition containing a ceramic, especially oxide ceramic, or a precursor for a ceramic, in addition to a polymer, through an annular nozzle in known fashion;
- b) producing a green composite from one or more of the green hollow fibers produced in step a) and at least two connection elements for feed or discharge of fluids on both ends of the green hollow fibers;
- and
- c) heat treating the green composite produced in step b) to eliminate the polymer and to produce contact between the ceramic hollow fibers and the connection elements as well as optionally the ceramic, especially oxide ceramic.
A method for recovering gases from gas mixtures or for liquid filtration, the method comprising passing a fluid through a hollow fiber membrane composite comprising at least one hollow fiber membrane comprising gas-permeable or liquid-permeable ceramic material, other than oxygen-permeable ceramic materials, the gas-permeable or liquid-permeable ceramic material having an outer surface, the outer surface being in contact with the outer surface of the same hollow fiber membrane or another hollow fiber membrane so as to have contact sites, the contact sites being joined by sintering.
Dependencies are inferred from the claim text.