摘要
Y3+在氨的水溶液中可形成Y(OH)3沉淀。在该体系中通入二氧化碳气体,随终点pH的不同,体系中存在的HCO3-、CO32-使Y(OH)3溶解为[Y(CO3)n]3-2n或[Y(HCO3)]3-络合离子。本试验研究了体系终点pH及起始氨浓度对CO32-、HCO3-浓度的影响以及进而对Y(OH)3沉淀率的影响,得到了使Y(OH)3完全沉淀的反应条件。
Y 3+ in NH 3·H 2O solution can precipitate in the form of Y(OH) 3, the molar ratio of HCO 3 - to CO 3 2- in the system changes with the final pH. Y(OH) 3 is soluble in water and changes into [Y(HCO 3) n ] 3- n or [Y(CO 3) n ] 3-2 n . The influences of the concentration of HCO 3 - and CO 3 3- on the precipitation rate of Y(OH) 3 were discussed, when CO 2 is flowed into the solution in which the concentration of NH 3·H 2O was different and the final pH was 8.00 or 10.00. The conditions of Y(OH) 3 complete precipitation were obtained.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
1998年第1期14-17,共4页
Chinese Journal of Rare Metals