UNIVERSAL SORPTION-FILTER ELEMENT FOR LIGHT VALVELESS DUST-AND-GASPROOF RESPIRATOR Russian patent published in 1996 - IPC

FIELD: cleaning of gases from deleterious impurities for protection of respiratory organs against acidic gases: PH₃, AsH₃, P₄, NO and CO in production areas of phosphorus, carbide products, non-ferrous metallurgy, at welding operations. SUBSTANCE: the universal sorption-filter element uses an antigas filter containing mass percent: calcium oxide - 14.3 to 20.0; glycerin - 14.3 to 20; water - 12 to 14.3; cotton cloth - the rest; antiaerosol filter and an antigas filter positioned between them, the latter uses sorbent of porous polyacrylonitrile fibres with powdered activated carbon inside them. EFFECT: enhanced efficiency.