粗铼化合物高铼酸、铼酸钾、铼酸铵是湿法冶金新工艺从铂铼废催化剂中回收铼得到的中间产品,生产要求对铼含量进行准确测定。取含铼约100mg的高铼酸、铼酸钾、铼酸铵样品于烧杯中,加入水至总体积为50mL,加热溶液或溶解样品,加入0.2mL过...粗铼化合物高铼酸、铼酸钾、铼酸铵是湿法冶金新工艺从铂铼废催化剂中回收铼得到的中间产品,生产要求对铼含量进行准确测定。取含铼约100mg的高铼酸、铼酸钾、铼酸铵样品于烧杯中,加入水至总体积为50mL,加热溶液或溶解样品,加入0.2mL过氧化氢氧化铼为铼(Ⅷ)、5 mL EDTA溶液掩蔽干扰离子、45 mL氨水、10 mL四苯砷氯盐酸盐溶液沉淀铼(Ⅷ),沉淀于烘箱中110℃烘除水分1h,恒重,建立了四苯砷氯盐酸盐重量法测定粗铼化合物高铼酸、铼酸钾和铼酸铵中铼的方法。实验表明:于选定条件下,铼与四苯砷氯盐酸盐沉淀完全,铂(Ⅳ)等20种共存离子不干扰测定。将方法分别用于3个管理样品、6个实际样品中45.30-84.34g/L、40.93%-69.42%铼的测定,测定值与参考值基本一致,相对标准偏差(RSD,n=7-11)为0.023%-0.085%,加标回收率为99.8%-100.1%。展开更多
In this paper study on the property and mechanism of adsorpting rhenium from aqueous hydrochloric acid by using methyl phosphorous acid dimythyl heptyl ester levextrel resin(CL-P350) is reported.The effects of time,ac...In this paper study on the property and mechanism of adsorpting rhenium from aqueous hydrochloric acid by using methyl phosphorous acid dimythyl heptyl ester levextrel resin(CL-P350) is reported.The effects of time,acidity,concentration of rhenium,and temperature on the adsorption of rhenium were investigated. The mechanism of adsorpting rhenium was discussed by chemical analytic and IR method,and dynamic adscrption and elution were studied.Experimental results show that the adsorption equilibration is reached in 4 min,the distribution coefficient(D) of Re(Ⅶ)increases with increase of concentration of HCl and reaches maximum 3.0-4.0moL/L HCl.ReO4^- is taken up by ion association mechanism and can be described by Langmuir equation of the equilibrium state.The thermodynamic parameters in the adsorption process of ReO4^- have been determined to be:ΔH=-29KJ/moL,ΔG=-25KJ/moL and ΔS=-13.5J/moL respectively.The saturation adsorption capacity of rhenium is 19.2mg/g when the solution containing 0.372g/L Re and 3.0mol/L HCl was passed through the resin column.The recovery percentage of rhenium is 98.4% while distilled water was used as an eluent.展开更多
文摘粗铼化合物高铼酸、铼酸钾、铼酸铵是湿法冶金新工艺从铂铼废催化剂中回收铼得到的中间产品,生产要求对铼含量进行准确测定。取含铼约100mg的高铼酸、铼酸钾、铼酸铵样品于烧杯中,加入水至总体积为50mL,加热溶液或溶解样品,加入0.2mL过氧化氢氧化铼为铼(Ⅷ)、5 mL EDTA溶液掩蔽干扰离子、45 mL氨水、10 mL四苯砷氯盐酸盐溶液沉淀铼(Ⅷ),沉淀于烘箱中110℃烘除水分1h,恒重,建立了四苯砷氯盐酸盐重量法测定粗铼化合物高铼酸、铼酸钾和铼酸铵中铼的方法。实验表明:于选定条件下,铼与四苯砷氯盐酸盐沉淀完全,铂(Ⅳ)等20种共存离子不干扰测定。将方法分别用于3个管理样品、6个实际样品中45.30-84.34g/L、40.93%-69.42%铼的测定,测定值与参考值基本一致,相对标准偏差(RSD,n=7-11)为0.023%-0.085%,加标回收率为99.8%-100.1%。
文摘In this paper study on the property and mechanism of adsorpting rhenium from aqueous hydrochloric acid by using methyl phosphorous acid dimythyl heptyl ester levextrel resin(CL-P350) is reported.The effects of time,acidity,concentration of rhenium,and temperature on the adsorption of rhenium were investigated. The mechanism of adsorpting rhenium was discussed by chemical analytic and IR method,and dynamic adscrption and elution were studied.Experimental results show that the adsorption equilibration is reached in 4 min,the distribution coefficient(D) of Re(Ⅶ)increases with increase of concentration of HCl and reaches maximum 3.0-4.0moL/L HCl.ReO4^- is taken up by ion association mechanism and can be described by Langmuir equation of the equilibrium state.The thermodynamic parameters in the adsorption process of ReO4^- have been determined to be:ΔH=-29KJ/moL,ΔG=-25KJ/moL and ΔS=-13.5J/moL respectively.The saturation adsorption capacity of rhenium is 19.2mg/g when the solution containing 0.372g/L Re and 3.0mol/L HCl was passed through the resin column.The recovery percentage of rhenium is 98.4% while distilled water was used as an eluent.