US EPA

1510044 

Journal Article 

Regeneration of Whetlerite for Adsorbing Toxic Pollutants from Air 

Deitz, VR 

19 

12 

Patent Application. nvention relates to a method of regenerating adsorbents for removing toxic pollutants from air. More specifically, it relates to a method of restoring the ability of metal oxide-impregnated activated carbon referred to as whetlerite to remove cyanogen chloride from air. Whetlerites are activated carbon-based composites impregnated with ammoniacal solutions of divalent copper and monovalent silver, with or without hexavalent chromium, in various concentrations. Optionally, triethylenediamine (TEDA) is added to prolong the service life of the absorbent and resist the adverse effects of humid environments. Whetlerites adsorb a wide variety of toxic air pollutants, in particular cyanogen chloride, cyanogen, and hydrogen cyanide. 

Adsorbents; Air pollution; High humidity; Service life; Toxicity; Adverse conditions; Chlorides; Chromium; Cyanogen; Environments; Ethylenediamine; Hydrogen cyanide; Pollutants; Removal; Valence; Whetlerites