Patent ID: 11883774
Assignee: AIR TECH GROUP, SLU
Field: Chemical engineering (Chemistry)
Classification: CPC B  Y | IPC B

Claim 0:
1. A filter cartridge for an air-purifying device for removing aldehyde from indoor air, said filter cartridge comprising a casing containing a plurality of filament-like elements as a support, with at least one natural polyphenol and a catalyst or catalytic agent integrated in said support, wherein said plurality of filament-like elements are of an organic or inorganic nature, and wherein the said filter cartridge is configured to act as an absorption filter and to reacting irreversibly with the aldehyde of the indoor air,
said at least one natural polyphenol is 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 combinations thereof,
said catalyst or catalytic agent comprising a solid sulphonic acid,
said support further comprising a mixture of said at least one natural polyphenol and said catalyst or catalyst agent, and
said mixture provided as a finely divided powder, forming a sponge-like mesh.