METHOD OF PRODUCING MODIFIED ACTIVATED CARBON Russian patent published in 2009 - IPC C01B31/08 

FIELD: chemistry.

SUBSTANCE: invention relates to production of activated carbon. A method is proposed for modifying industrial activated carbon, which involves its treatment with low-concentration effluent of production of ε-caprolactam, containing up to 0.5 g/dm³ caprolactam and up to 0.2 g/dm³ ammonium sulphate, with ratio of mass of carbon (g) to volume of effluent water (cm³) - 1:10 for 24 hours, subsequent drying and heating the carbon to temperature of 250°C in air for 4 hours.

EFFECT: increased sorption capacity of carbon with respect to copper (II) ions.

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