Abstract: In order to provide basis for separation and recovery of gallium in bauxite leaching mother liquor， the principles of adsorption by amidoxime chelating resin toward Ga， V and Al， and desorption by hydrochloric acid were studied. Results are as follows: ① amidoxime chelating resin has high selectivity for gallium， and the adsorption rate of aluminum was very low； the temperature had little effect on the adsorption of gallium and aluminum， and had great effect on the adsorption of vanadium. Adsorption rate of vanadium increased with temperature. Adsorption rate of gallium was faster than that of vanadium. Gallium adsorption is in accordance with quasi-second-order kinetics and particle internal diffusion model. The optimum adsorption conditions of gallium is: the adsorption temperature 25 ℃， the adsorption time for 60 min. ② Under the condition of 25 ℃ and low concentration hydrochloric acid， the desorption rate of gallium and aluminum adsorbed by amidoxime chelating resin is high， the desorption speed is fast， and the desorption rate is less affected by the desorption temperature， and the vanadium is difficult to adsorb. When the concentration of hydrochloric acid and temperature increased， the desorption rate of vanadium showed an increasing trend. The optimum desorption conditions of gallium is: hydrochloric acid concentration 1.0 mol/L， the desorption temperature is 25 ℃， and the desorption time is 5 min. ③ Due to the adsorption rate of gallium and vanadium in bauxite leaching mother liquor by amidoxime chelating resin is higher， and the desorption of vanadium is difficult， which affects the regeneration and recycling of resin. In order to separate and recover gallium efficiently and cheaply， it is necessary to reduce the vanadium content of the solution by adding NaOH to form sediment as much as possible before the resin adsorbs gallium.

Key words: Amidoxime chelating resin, Gallium, Adsorption, Desorption