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

Claim 10:
11. A method for removing aldehyde, amine and ammonia from indoor air, the method comprising:
passing a controlled airflow of contaminated indoor air through an air filter comprising a plurality of filament-like elements as a support, with at least one natural polyphenol and a catalyst or catalytic agent integrated in the support,
the plurality of filament-like elements are of an organic or inorganic nature,
the aldehyde like VOCs configured to react with at least one natural polyphenol in the presence of the catalytic agent, generating a polymer in the form of a polyphenol-aldehyde resin, the air filter configured to retain the polymer in the form of a polyphenol-aldehyde resin, and
the air filter comprising a sponge like-mesh configured to capture the amine and ammonia, as well as imines and aminals arising from their reaction with aldehyde, due to the catalytic agent present in the air filter,
the 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-benzene-triol), phloroglucinol (1,3,5-benzenetriol), and hydroquinone (1,4-benzenediol), or combinations thereof,
the catalyst or catalytic agent is a solid sulphonic acid, and
a mixture of the at least one natural polyphenol and the catalytic agent is provided in the support comprising the plurality of filament-like elements as a finely divided powder and is configured to form the sponge-like mesh.