A composition and process for the absorption of nitrogen oxide in smoke of tobacco, filter to purify the smoke of tobacco of nitrogen oxide and process for impregnacao base of a filter

摘要

The invention consists of a method for absorbing nitrogen oxide and carbon monoxide from tobacco smoke. It includes a base made of acetate, cellulose and acetate-cellulose fibers. The base is impregnated with an absorbing agent, and the absorbing agent may include a complex compound of ferrous iron and thiol-containing low-molecular ligands. A method for impregnating the base of the filter with the absorbing agent comprises immersing the base in an aqueous suspension of a complex compound of ferrous iron and thiol-containing low-molecular ligands and then drying it; or, treating the base with an aqueous solution of a thiol- containing low-molecular ligand, treating the resulting compound with an aqueous solution of ferrous salts and then drying the resulting compound. A composition for absorbing nitrogen oxide and carbon monoxide from smoke comprises a complex compound of ferrous iron and thiol-containing low- molecular ligands. A method of removing nitrogen oxide and carbon monoxide from smoke consists of passing the smoke through an absorbing agent consisting of a complex compound of ferrous iron and thiol- containing low-molecular ligands.