USE OF SUBSTITUTED THIO UREAS IN THE SEPARATION OF COMPLEXED HEAVY METAL IONS

摘要

Heavy metals can be precipitated from waste water or aqueous reaction solutions containing inorganic and/or organic complexing agents with substituted thiorureas of the general formula R1R2N-CS-NH-COR3. N,N-dialkyl-N'-benzoyl thioureas are used with preference, whereby methyl, ethyl, n-propyl or isobutyl groups are used as alkyl substituents.