METHOD FOR THE REMOVAL AND RECOVERY OF METALS AND PRECIOUS METALS FROM SUBSTRATES

摘要

A method for removing metal and/or precious metal-containing depositions from substrates, wherein said substrate is subjected to treatment with an organo amine protectant component P and an inorganic active component A. Component P may be formed in situ by reaction with component R. Component P is an organic amine and/or organic amine hydrochloride (preferably diisopropylamine hydrochloride), component A is an inorganic compound (preferably inorganic acid or a mixture thereof) and component R is an organic compound that can be split along the C- N bond by the component A into an organic amine (preferably di-methylformamide or N-methyl pyrrolidone). The metals in the form of organo-metallic complexes can be isolated and/or separated by means of different chemical reactions (preferably reduction reactions) and/or biosorption (preferably with seaweed or yeast).

主权项

1. A method for removing precious metal-containing depositions from a substrate, comprising the step of treating the substrate with an organo amine protectant component (“P”) and an inorganic active component or (“A”) treating with a complexing component (“C”) and an “A”, wherein said component “P” or “C” is selected from the group including mono-, di- and tri-substituted amines hydrochlorides, wherein each substituent is independently an alkyl having 1 to 18 carbon atoms or a cycloalkyl having 3 to 8 carbon atoms and wherein said component “A” is an inorganic acid or its salt or a mixture thereof.