| 摘要 |
<p>1499387 Adsorption of impurities from effluent CIBA-GEIGY AG 12 Sept 1975 [13 Sept 1974] 37616/75 Heading ClC [Also in Division C3] A process for purifying an aqueous industrial effluent comprises bringing said effluent into contact with an adsorption material comprising a carrier that has been pretreated with a basic nitrogenous polymeric compound which has been precipitated with an activated clay material (clay complex). The effluents may be waste liquors from the textile, paper or leather industry or from the manufacture of dyes or fluorescent brighteners, and may contain organic ionic substances such as anionic or cationic dyes, fluorescent brighteners, textile or dyeing assistants, surfactants, tannins or mixtures of such ionic substances. Examples of nitrogenous compounds are polyamides, polyamide polyamines, basic aminoplasts, epoxidized aliphatic polyamines and polyalkylene imines of MW 500 to 200,000.</p> |
