Ion exchange refers that when the water goes across ion exchange column, the cation and anion of the water (HCO - plasma) exchange with the H+ ions of positive resin and OH- ion negative resin in exchange column so as to achieve the purpose of desalination. Ion exchange equipment can achieve automatic continuous detection of water quality, excessive automatic alarm, and automatic complete regeneration process. Spare parts adopt high strength engineering plastic which is of corrosion resistance. This enhances the reliability and durability of equipment. Ion exchange technology was first applied in the preparation of soft water and salt water. Pharmaceutical production water often uses this method. In the biomedical field, ion exchange technology is gradually applied in the separation and extraction of substances such as protein, nucleic acid. Some classic production process is also waiting for ion exchange technology to replace or modify.Tungsten wet smelting with ion exchange process is short and can complete two tasks in removing impurity and transformation at the same time. Equipment is simple and the recovery rate is high.

 

The kinetics of ion-exchange process between 201x7（Cl- form)strong basic anion-exchange resin and strong concentration WO42-was studied by batch reactor method in this research. The ion-exchange adsorption isotherms in different conditions were determined and double driving-force model was applied to describe the kinetics of ion-exchange process. 

 

The results indicated that the ion-exchange rate was not affected by the concentration of WO42- and the stirring rate; however it was increased with the increasing of the reaction temperature and the reducing of the bead radius and varied inversely with square of the bead radius. The ion-exchange process was controlled by the grain diffusion. The apparent activation energy of reaction was decreased with the increasing of the concentration of WO42-. The effect of the concentration of Cl- on the ion-exchange process was also studied in this paper. 

 

The results showed that the kinetical rule of the ion-exchange reaction was not changed, the ion-exchange process was still controlled by the grain diffusion, and the concentration of Cl-has little effect on the apparent activation energy of reaction if the total concentration of ion in the solution kept invariableness. The exchange capacity and the adsorption rate of the resin to WO42-were decreased with the increasing of the concentration of Cl-.