Tob. Reporter, 1982, 109-4, p. 78, 82, ISSN.0361-5693
Tobacco smoke filtering compositions
U.S. Patent 4,266,561 assigned to Brown & Williamson Tobacco Co. The compositions comprise a base of alumina (aluminium oxide) impregnated with various proportions of zinc acetate, acetic acid and polyethyleneimine. The compositions are usefully...