METHOD OF TREATING SPENT PETRYANOV FABRIC-BASED FILTERS Russian patent published in 2013 - IPC G21F9/28 B01D41/04 

FIELD: chemistry.

SUBSTANCE: method of treating spent Petryanov fabric-based filters involves contact thereof with an organic liquid which dissolves filter material, separating solid aerosol particles accumulated on the filter, from the formed Petryanov fabric solution, depositing filter material followed by separation thereof from the solution and regenerating the solvent. The accumulated solid aerosol particles are industrially recycled substances. The organic liquids which dissolve filter material are preferably butyl cellosolve, methylene chloride and xylenes. The filter material precipitant used is in form of liquids which are infinitely miscible with the solvent and do not dissolve filter material, preferably water, alcohols and saturated hydrocarbons. The solvent is regenerated by low pressure distillation.

EFFECT: providing dust-free dismantling of filters, multifold reduction of the amount of wastes to be buried.

5 cl, 6 ex