中文摘要：

由氯甲酸乙酯和硫氰酸钠经亲核取代反应和异构化合成N-烃氧羰基异硫氰酸酯中间体,再将该中间体与二醇经亲核加成反应合成了3种未见报道的N,N＇-二乙氧羰基-O,O＇-烷基二硫氨酯（1～3）.经元素分析、红外光谱、核磁共振氢谱及碳谱分析,证实所合成的化合物即为目标产物.小型浮选实验结果表明,仅使用6 g/t的目标化合物1～3,铜的品位即可分别达到6.12%,6.35%和5.92%,回收率分别达到75.31%,76.50%和76.35%,用量远低于丁基黄药,且铜的品位和回收率都有不同程度的提高,可作为一种新型捕收剂应用到硫化铜类矿物的浮选中.

英文摘要：

The synthesis and research of thiocarbamate which contains two eater groups and two acylamide groups were 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 spectra,1H NMR and 13C NMR.Small scale flotation experiments show that,when the dosage of target compounds 1—3 was 6 g/t,the grade of Cu can reach to 6.12%,6.35% and 5.92%,respectively,the recovery of Cu can reach to 75.31%,76.50% and 76.35%,respectively,the dosage of each collector is far lower than butyl xanthate,while the grade and recovery are higher.So this kind of dithionocarbamates is suggested to be applied in the flotation of sulfur copper as a new collector.