SEPARATION OF WASTE DYESTUFFS BY ADSORPTION PROCESS

摘要

Effluents from dye manufacturing and dyeing operations which contain waste dyestuffs are decolorized and their oxygen demand substantially reduced by passing at least a major part of the effluent through a bed of essentially non-ionogenic, macroreticular, water-insoluble, cross-linked polymeric adsorbent resin followed by contacting the partially decolorized effluent with a weak acid and/or aliphatic weak base ion exchange resin.