The extraction of potassium from potash feldspar by NaCl, CaCl 2, SrCl 2 and BaCl 2 has been investigated as function of salt kind and calcination temperature. The phase compositions of potash feldspar and its calcina...The extraction of potassium from potash feldspar by NaCl, CaCl 2, SrCl 2 and BaCl 2 has been investigated as function of salt kind and calcination temperature. The phase compositions of potash feldspar and its calcinated, and water insoluble substances of NaCl, CaCl 2 co-calcinated potash feldspar were analyzed by XRD. The experiment results showed that the order of ion exchange extraction of potassium was Na +>Ca 2+>Sr 2+>Ba 2+, and at calcination temperature over the melting points of NaCl or CaCl 2, the two salts gave potassium ion-exchange degree >90% much greater than that calcinated with other salts.展开更多
Cationic ion-exchange Separation process of L-phenylalanine with high salt concentration was investigated.One cationic exchange resin HD-1 with high adsorbance on L-phenylalanine was selected for the separation.The ad...Cationic ion-exchange Separation process of L-phenylalanine with high salt concentration was investigated.One cationic exchange resin HD-1 with high adsorbance on L-phenylalanine was selected for the separation.The adsorbance of resin was near to 0.09?g L-phenylalanine per milliliter resin.At the same time,the effects of concentration,velocity of flow and inorganic salt on L-phenylalanine adsorption were studied.The yield of separation process was close to 96.7%.展开更多
Based on the difference in tendency to polymerize between tungsten and molybdenum, a new method using D309 resin was propounded. The batch tests indicate that the optimum pH value and contact time for the separation a...Based on the difference in tendency to polymerize between tungsten and molybdenum, a new method using D309 resin was propounded. The batch tests indicate that the optimum pH value and contact time for the separation are 7.0 and 4 h respectively, the maxium separation factor of W and Mo is 9.29. And the experimental resules show that isothermal absorbing tungsten and molybdenum belongs to Langmuir model and Freundlich model respectively, and the absorbing kinetics for tungsten is controlled by intra-particle diffusion. With a solution containing 70 g/L WO3 and 28.97 g/L Mo, the effluent with a mass ratio of Mo to WO3 of 76 and the eluate with a mass ratio of WO3 to Mo of 53.33 are obtained after column test.展开更多
文摘The extraction of potassium from potash feldspar by NaCl, CaCl 2, SrCl 2 and BaCl 2 has been investigated as function of salt kind and calcination temperature. The phase compositions of potash feldspar and its calcinated, and water insoluble substances of NaCl, CaCl 2 co-calcinated potash feldspar were analyzed by XRD. The experiment results showed that the order of ion exchange extraction of potassium was Na +>Ca 2+>Sr 2+>Ba 2+, and at calcination temperature over the melting points of NaCl or CaCl 2, the two salts gave potassium ion-exchange degree >90% much greater than that calcinated with other salts.
文摘Cationic ion-exchange Separation process of L-phenylalanine with high salt concentration was investigated.One cationic exchange resin HD-1 with high adsorbance on L-phenylalanine was selected for the separation.The adsorbance of resin was near to 0.09?g L-phenylalanine per milliliter resin.At the same time,the effects of concentration,velocity of flow and inorganic salt on L-phenylalanine adsorption were studied.The yield of separation process was close to 96.7%.
基金Project(51174232)supported by the National Natural Science Foundation of China
文摘Based on the difference in tendency to polymerize between tungsten and molybdenum, a new method using D309 resin was propounded. The batch tests indicate that the optimum pH value and contact time for the separation are 7.0 and 4 h respectively, the maxium separation factor of W and Mo is 9.29. And the experimental resules show that isothermal absorbing tungsten and molybdenum belongs to Langmuir model and Freundlich model respectively, and the absorbing kinetics for tungsten is controlled by intra-particle diffusion. With a solution containing 70 g/L WO3 and 28.97 g/L Mo, the effluent with a mass ratio of Mo to WO3 of 76 and the eluate with a mass ratio of WO3 to Mo of 53.33 are obtained after column test.
