Composition based on a blend of inorganic fibers and inorganic fiber whiskers
First Claim
1. A method for preparing a filter media structure comprising inorganic fibers, inorganic fiber whiskers and a binder comprising:
- a) mixing together inorganic fibers;
inorganic fiber whiskers;
a binder and water to form a slurry;
b) removing the excess water from the slurry;
c) drying said slurry at a temperature sufficient to fuse the binder to form said filter media structure; and
d) carbonizing said filter media structure.
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Abstract
A filter media structure, which is capable of operating in the micro- and nanofiltration regime, offers: low cost, durability, high temperature and chemical resistance, high permeability, high flow rate, low pressure drop across the filter media, high mechanical strength, separation efficiency, and biocompatibility. The filter media structure is comprised of mixture of carbon or ceramic fibers and inorganic fiber whiskers generally having a diameter of from about 0.03 to about 5 microns. The present invention further provides a method of preparing a filter media structure comprising mixing together a) inorganic fibers; b) inorganic fiber whiskers; c) a water soluble binder, and optionally depositing a thin layer of pyrolytic carbon on the surface of the inorganic fibers and inorganic fiber whiskers comprising the filter media structure. The filter media structure is selected from the group consisting of a paper, felt and fabric. The present invention provides a further method for preparing a filter media structure comprising a) mixing together inorganic fiber whiskers and a resin selected from the group consisting of thermosetting and thermoplastic resins; b) impregnating inorganic fibers with said inorganic fiber whisker/resin mixture to form a paper.
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Citations
56 Claims
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1. A method for preparing a filter media structure comprising inorganic fibers, inorganic fiber whiskers and a binder comprising:
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a) mixing together inorganic fibers;
inorganic fiber whiskers;
a binder and water to form a slurry;
b) removing the excess water from the slurry;
c) drying said slurry at a temperature sufficient to fuse the binder to form said filter media structure; and
d) carbonizing said filter media structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for preparing a filter media structure comprising inorganic fibers, inorganic fiber whiskers and a binder comprising:
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a) mixing together inorganic fiber whiskers and a resin binder to form a mixture;
b) impregnating said inorganic fibers with said inorganic fiber whisker/resin binder mixture to form a filter media structure having a random assemblage of impregnated fibers and fiber whiskers;
c) carbonizing said inorganic fiber whisker/resin binder impregnated inorganic fiber filter media structure; and
optionallyd) depositing pyrolytic carbon on the surface of the fibers in said inorganic fiber whisker/resin binder impregnated inorganic fiber filter media structure. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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- 28. A composition of matter comprising a blend of inorganic fibers, inorganic fiber whiskers and one of (i) a fused binder or (ii) a fused and carbonized binder.
Specification