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US 12,521,776 B2Granted
Cleaning and depolluting of fibres originating from used cigarette butts by contacting with a supercritical fluid and recycling of the depolluted fibres
OwnerJulien Paqueinventor
Life of this patent
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Abstract
The present invention concerns a facility for cleaning cigarette butts, including a treatment tank configured to treat the cigarette butts in order to extract therefrom fibres to be depolluted, and depollution means configured to depollute the fibres by placing them in contact with a fluid in the supercritical state, referred to as supercritical fluid.
Claims14
A method for cleaning smoked cigarette butts comprising:
- treating the smoked cigarette butts to extract cellulose acetate fibres to be depolluted;
- depolluting the cellulose acetate fibres by bringing them into contact with a supercritical fluid, a pressurised dense fluid in a supercritical state;
- and
- adding an extractant to the pressurised dense fluid to extract targeted and undesirable substances from the cellulose acetate fibres.
1 more element
Dependencies are inferred from the claim text.