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US 11,987,914 B2Granted
Activated porous fibers and products including same
AssigneeUnifrax I LLC
InventorsJonathan Cross, Adam Kelsall, Bruce Zoitos, Chad Cannan
Life of this patent
Estimating the term…
Abstract
A composition including inorganic fibers having a surface area of at least 5 m2/g and an active agent incorporated into the inorganic fibers and/or applied onto at least a portion of the inorganic fibers. Products including the composition may include fiber aggregates, composite materials, filter elements, catalytic elements, exhaust gas treatment devices and other exhaust system components, and papers.
Claims29
A fiber blanket comprising:
- inorganic fibers having a surface area of at least 15 m2/g;
- an active agent incorporated into the inorganic fibers and/or applied onto at least a portion of the inorganic fibers;
- and
- a sorbent for lead or cadmium incorporated into the inorganic fibers and/or applied onto at least a portion of the inorganic fibers;
- wherein the active agent is present in an amount, based on a total weight of the composition, of 1 to 25 percent by weight;
- wherein the inorganic fibers have a median fiber diameter of 1 to 10 μm;
- wherein the inorganic fibers comprise:
- (i) fibers comprising 50 weight percent by weight or greater silica;
- and/or
- (ii) fibers comprising 50 weight percent by weight or greater alumina;
- and/or
- (iii) zirconia fibers comprising less than 1 percent by weight titania;
- wherein the sorbent for lead or cadmium is an alumino-silicate compound;
- and
- wherein the fiber blanket is formed via air-laying.
12 more elements
An emission control device comprising:
- a fiber blanket formed via air-laying and comprising inorganic fibers having a surface area of at least 15 m2/g, an active agent incorporated into the inorganic fibers and/or applied onto at least a portion of the inorganic fibers, and a sorbent for lead or cadmium incorporated into the inorganic fibers and/or applied onto at least a portion of the inorganic fibers;
- and
- a permeable support, wherein the fiber blanket is enclosed within the permeable support and the permeable support allows fluid communication therethrough;
- wherein the active agent is present in an amount, based on a total weight of the fiber blanket, of 1 to 25 percent by weight;
- wherein the inorganic fibers have a median fiber diameter of 1 to 10 μm;
- wherein the inorganic fibers comprise:
- (i) fibers comprising 50 weight percent by weight or greater silica;
- and/or
- (ii) fibers comprising 50 weight percent by weight or greater alumina;
- and/or
- (iii) zirconia fibers comprising less than 1 percent by weight titania;
- and
- wherein the sorbent for lead or cadmium is an alumino-silicate compound.
10 more elements
A fiber blanket consisting of:
- inorganic fibers having a surface area of at least 15 m2/g;
- an active agent incorporated into the inorganic fibers and/or applied onto at least a portion of the inorganic fibers;
- and
- optionally, a secondary agent incorporated into the inorganic fibers and/or applied onto at least a portion of the inorganic fibers;
- wherein the active agent is one or more transition metal-containing catalysts;
- wherein the active agent is present in an amount, based on a total weight of the fiber blanket, of 1 to 25 percent by weight;
- wherein the inorganic fibers have a median fiber diameter of 1 to 10 μm;
- wherein the inorganic fibers consist of:
- (i) fibers having 50 weight percent by weight or greater silica;
- and/or
- (ii) fibers having 50 weight percent by weight or greater alumina;
- and/or
- (iii) zirconia fibers having less than 1 percent by weight titania;
- wherein the secondary agent consists of calcium oxide, barium oxide, barium hydroxide, barium carbonate, an alumino-silicate composition, or combinations thereof;
- and
- wherein the fiber blanket is formed via air-laying.
13 more elements
Dependencies are inferred from the claim text.