US 12,274,972 B2
Filter and a method for removing aldehyde-type VOCs from indoor air
Jaume Vilarrasa Llorens, Barcelona (ES); Lluis Bosch Hereu, Santa Maria de Palautordera (ES); and Lluis Trench Roca, Sallent (ES)
Assigned to AIR TECH GROUP, S.L.U., Sarral (ES)
Appl. No. 17/788,397
Filed by Air Tech Group, SLU, Sarral (ES)
PCT Filed Nov. 19, 2020, PCT No. PCT/EP2020/082639
§ 371(c)(1), (2) Date Jun. 23, 2022,
PCT Pub. No. WO2021/129985, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 19383191 (EP), filed on Dec. 23, 2019.
Prior Publication US 2023/0028077 A1, Jan. 26, 2023
Int. Cl. B01D 53/04 (2006.01); B01D 53/86 (2006.01)
CPC B01D 53/0407 (2013.01) [B01D 53/8687 (2013.01); B01D 2253/20 (2013.01); B01D 2253/34 (2013.01); B01D 2257/406 (2013.01); B01D 2257/708 (2013.01); B01D 2258/06 (2013.01); B01D 2259/4508 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A filter for removing aldehyde Volatile Organic Compounds (VOCs) from indoor air, said filter being an absorption filter and configured to react irreversibly with the aldehyde VOCs of the indoor air, said filter comprising at least one casing configured to acting as a container, said container comprising two air-permeable opposite walls configured to allow a flow therethrough of a volume of the indoor air, said casing structured to housing one or more natural polyphenols and a catalytic agent,
said one or more natural polyphenols comprise powdered polyphenols and are selected from the group consisting of: resveratrol (3,4′,5-trihydroxystilbene), resorcinol (1,3-benzenediol), pyrogallol (1,2,3-benzenetriol), phloroglucinol (1,3,5-benzenetriol) and hydroquinone (1,4-benzenediol), or a combination thereof, and
said catalytic agent comprises a solid sulfonic acid, wherein a mixture of said one or more natural polyphenols and said catalytic agent are present, in the container, as compacted block elements.