Abstract: The synthesis and research of thiocarbamate which contains two eater group and two acylamide group was reported. The intermediate N-ethoxylcarbonyl isothiocyanate was synthesized from ethyl chloroformate and sodium thiocyanate by nucleophilic substitution reaction and isomerization. Then using this intermediate with diols as raw materials, the target products N,N’-diethoxycarbonyl-O,O’-alkyl-dithionocarbamates were obtained by nucleophilic addition reaction. The compounds were characterized by elemental analysis, infrared spectrum, 1HNMR and 13CNMR. Small scale flotation experiments showed that, when the dosage of target compounds a~c was 6 g/t, the grade of Cu can reached to 6.12%, 6.35% and 5.92% respectively, the recovery of Cu can reached to 75.31%, 76.50% and 76.35% respectively, the dosage of each collector was far lower than butyl xanthate, while the grade and recovery were higher. So this kind of dithionocarbamates is suggested to be applied in the flotation of sulfur copper as a new collector.

Key words: Diethoxycarbonyl, dithiocarbamate, synthesis