| 摘要 |
A class of methods for impregnating zeolite crystals with one manganese dioxide and phosphoric acid, and the impregnated zeolite product of each such method. The manganese dioxide-impregnated zeolite (2A) is optionally coated with a quaternary ammonium cation (4) or a permanganate. In some embodiments, manganese dioxide-impregnated zeolite crystals are produced by flowing a fluid, containing at least one substance (such as ethylene gas) capable of reacting with permanganate to produce manganese dioxide, relative to permanganate-impregnated crystals. In some embodiments, manganese dioxide-impregnated zeolite crystals are produced by flowing a gas consisting essentially of one or more of hydrogen, nitrogen, ethylene, and formaldehyde (or a fluid contaminated with at least one such gas) through a bed of potassium permanganate-impregnated zeolite crystals.
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