一、前言 荧光级氧化钇的试制与生产近年来在我国已有很大发展。荧光级Y_2O_3对钙的含量有严格的要求(Ca≤7PPm),关于钇与钙的分离我们倾向于环烷酸萃取法。 我厂以龙南富钇重稀土为原料,其中含钙约1～1.5％。经环烷酸萃取法分离钇与非钇稀土后所得的YCl_3溶液中Ca/Y_20_3约为20000ppm。本试验以这种YCl_3溶液为料液,用10％环烷酸作萃取剂,在单级设备 I. Introduction The trial production and production of fluorescent grade yttrium oxide have been greatly developed in our country in recent years. The level of fluorescence Y_2O_3 on the calcium content of the stringent requirements (Ca ≤ 7PPm), on the separation of yttrium and calcium we tend to naphthenic acid extraction. I plant Longnan rich yttrium heavy rare earth as raw material, of which about 1 to 1.5% calcium. After naphthenic acid extraction of yttrium and non-yttrium rare earth yt3 solution obtained Ca / y_20_3 about 20000ppm. This experiment to YCl_3 solution as feed solution, with 10% naphthenic acid as extractant in a single-stage equipment