NEW PROCEDURE FOR SYNTHESIS OF PROPYL AND BUTYL THIONCARBAMATE FLOTATION REAGENTS

摘要

Invention herewith described refers to the new procedure for obtaining N-alkyl and N,N-di-alkyl-O-alkylthiocarbamate of the general formula (I) where R represents propyl or butyl group and R1 represents ethyl, propyl and isopropyl group, which is, according to this invention, characterized by: alkyl ksantogenat (II)where R represents propyl or butyl group and Me represents sodium or potassium, it reacts with salts of primary or secondary alkyl amines and sulphuric acid of the general formula (III)R1R1(H)NH•H2SO4in which R1 represents ethyl, propyl and isopropyl group resulting from the reaction of neutralization of primary or secondary alkyl amines or secondary alkyl amines of the general formula (IV)in which R1 represents ethyl, propyl and isopropyl group, with sulphuric acid (V)H2SO4in the presence of sodium hypochlorite as an oxidizing agentNaOCl(VI)At a temperature of 25°C to 30°C, in water as a solvent, with the molar ratio of alkyl sanatogen, amine salts of sulphuric acid and oxidizing agent 1:0,55:1,5.