US 11,987,914 B2
Activated porous fibers and products including same
Jonathan Cross, Warrington (GB); Adam Kelsall, Northwich (GB); Bruce Zoitos, Williamsville, NY (US); and Chad Cannan, Lancaster, NY (US)
Assigned to Unifrax I LLC, Tonawanda, NY (US)
Filed by Unifrax I LLC, Tonawanda, NY (US)
Filed on Apr. 4, 2019, as Appl. No. 16/375,114.
Claims priority of provisional application 62/652,551, filed on Apr. 4, 2018.
Prior Publication US 2019/0309455 A1, Oct. 10, 2019
Int. Cl. D04H 1/4209 (2012.01); B01D 53/86 (2006.01); B01J 23/40 (2006.01); B01J 35/56 (2024.01); B01J 37/02 (2006.01); D04H 1/52 (2006.01); F01N 3/035 (2006.01); F01N 3/10 (2006.01); F01N 3/28 (2006.01)
CPC D04H 1/4209 (2013.01) [B01D 53/86 (2013.01); B01J 23/40 (2013.01); B01J 35/56 (2024.01); B01J 37/0201 (2013.01); D04H 1/52 (2013.01); F01N 3/035 (2013.01); F01N 3/101 (2013.01); F01N 3/2835 (2013.01); B01D 2255/102 (2013.01)] 29 Claims
OG exemplary drawing
 
1. 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.