UNIVERSAL FILTERING ELEMENT Russian patent published in 2015 - IPC A62B23/02 

FIELD: chemistry.

SUBSTANCE: known composition of universal filtering element, which includes, wt %: potassium carbonate - 17.0-25.0; sodium hydroxide - 0.7-1.0; sodium silicate - 9.0-12.5; glycerine 9.0-12.5; water - 5.9-7.4; cotton fabric the remaining part, does not provide effective protection from sulphur hydroxide if its content is higher than 15 MPC. The fact that claimed composition additionally contains calcium oxide and manganese sulphate with component ratio, wt %: potassium carbonate 22.0-32.0; calcium oxide 0.8-1.1; sodium hydroxide - 1.0-1.5; sodium silicate - 10.0-14.0; glycerine - 9.0-13.0; manganese sulphate - 0.07-0.12; water - 12.0-16.0; cotton fabric - the remaining part, makes it possible to increase sorption capacity of filter, protection degree of sulphur dioxide and additional retention of hydrogen sulphide, which makes it possible to efficiently apply filter for protection of respiratory organs in industrial quarters, where sulphur dioxide content exceeds 15 MPC, hydrogen sulphide - 15 MPC, and content of hydrogen fluoride reaches 30 MPC.

EFFECT: protection of respiratory organs from harmful substances, which are in air of industrial quarters of aluminium, phosphorus factories, mineral fertilisers and non-ferrous metallurgy.

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