Using　butyl　sodium　xanthate　and　dichloroethane　as　raw　materials,　a　new　chalcopyrite　collector　o-butyl　S-(1-chloroethyl)　dithiocarbonate　(GC-)　was　synthesized.　Gas　chromatography　and　infrared　spectroscopy　analysis　show　that　the　agent　is　a　lipid　collector　with　a　purity　of　90.88%.　The　pure　mineral　flotation　test　compares　the　collection　effect　of　the　new　agent　GC-　and　the　commonly　used　sulfide　ore　collectors　on　chalcopyrite　and　pyrite.　The　results　show　that,　under　the　flotation　conditions　at　the　slurry　pH　of　7　and　the　slurry　dosage　of　160　mg/L,　GC-　can　directly　float　96.5%　of　chalcopyrite,　and　the　recovery　rate　of　pyrite　is　only　12%,　which　reflects　the　high　selectivity　of　the　new　agent　GC-　to　chalcopyrite.　The　flotation　comparison　test　of　the　actual　ore　of　Duobaoshan　Copper　Mine　using　GC-　and　butyl　xanthate　show　that,　under　the　same　conditions,　the　recovery　rates　of　the　two　agents　for　copper　are　similar.　Using　GC-　as　the　collector,　the　grade　of　ore　copper　increases　by　17.14%.　FT-IR　spectroscopy　analysis　show　that　GC-　is　chemically　adsorbed　on　the　surface　of　chalcopyrite　and　physically　adsorbed　on　the　surface　of　pyrite,　which　can　achieve　better　separation　of　copper　and　sulfur.　The　adsorption　capacity　test　results　show　that,　when　the　pH　value　is　7,　the　adsorption　capacity　of　GC-　on　the　surface　of　chalcopyrite　reaches　the　maximum　value,　and　the　adsorption　capacity　on　the　surface　of　pyrite　is　less.　The　change　trend　of　adsorption　capacity　is　consistent　with　the　pure　mineral　flotation　test.　©　2021,　Science　Press.　All　right　reserved.