P204从硫酸体系萃取镓性能研究

研究了P204从硫酸体系萃取镓的性能,分别考察了料液酸度、萃取剂浓度、时间、浓度等对镓萃取与反萃的影响并绘制等温线,确定并模拟逆流试验过程。结果表明:料液含0.3g/L Ga^3+,pH=1.2,有机相采用20%P204(体积分数)+磺化煤油,按相比O/A=1∶3,25℃萃取8min,经过3级逆流萃取,镓萃取率可达到99.33%,负载有机相用1.0mol/L H2SO4溶液反萃,按相比O/A=10∶1,反萃温度25℃,反萃时间10min,经过3级逆流反萃,镓反萃率达98.99%,镓浓度富集近30倍。反萃液中的镓经氨水中和沉淀、焙烧后,可得到氧化镓产品。

Study on Extraction Performance of Gallium from Sulfuric Acid Medium by P204

Extraction performance of gallium from sulfuric acid medium by P204 was tested.Effects of feed acidity,extractant concentration,time,phase ratio and temperature on extraction and stripping of gallium were investigated. The isotherms of extraction and stripping were plotted,and counter current experimental process was simulated.The results show that extraction rate of gallium is 99.33% from solution containing 0.3 g/L Ga^3+ and pH=1.2 as feed liquor after three-stage counter current extraction with 20% P204(volume fraction)in sulphonated kerosene as extractant,O/A=1/3,temperature of 25℃,time of 8 min.Gallium stripping rate from loaded organic phase with 1.0 mol/L H2SO4 is 98.99%after threestage counter current stripping with O/A=10/1,temperature of 25 ℃,and time of 10 min.After the whole process,gallium concentration enriches by about 30 times.After precipitating by ammonia and calcination,gallium in stripping solution can be recovered as Ga2O3 product.