化工学报Issue(4)：1498-1505,8.DOI:10.11949/j.issn.0438-1157.20141555
废弃CRT荧光粉中稀土的提取工艺与技术
Recovery of rare earth from waste CRT phosphor
摘要
Abstract
On the basis of dilute hydrochloric acid pretreatment, recovery of rare earth from waste CRT phosphor was further studied, and a process route was developed. After dilute acid pretreatment, optimum conditions for recovering rare earth from waste CRT phosphor were:concertration of hydrochloric acid for hydrolysis of residual phosphor solids 5 mol·L−1, reaction temperature 80℃, pH value of leaching liquor after hydrolysis reaction 5.5, ratio of diethyldithiocarbamate (DDTC) and phosphors dosage 6:1, calcination temperature of rare earth oxalate precipitation 900℃. The total content of rare earth products Y2O3 and Eu2O3 was 99.2%. The crystal particles of rare earth product possessed polyhedral structure built by the accretion of flaky crystals. The particles were embeded in each other with mosaic contact.关键词
废弃CRT荧光粉/稀土/DDTC/浸取/沉淀/分离Key words
waste CRT phosphor/rare earth/DDTC/leaching/precipitation/separation分类
化学化工引用本文复制引用
申星梅,李辽沙,武杏荣,王平,王莲贞..废弃CRT荧光粉中稀土的提取工艺与技术[J].化工学报,2015,(4):1498-1505,8.基金项目
国家自然科学基金项目（）；51302003安徽省高等学校省级自然科学研究项目（KJ2012A041）；安徽省科技厅项目（1306c083017）。@@@@supported by the National Natural Science Foundation of China(51302003), the University Science Research Project of Anhui Province (KJ2012A041) and Anhui Science& Technology Department Foundation of China (1306c083017) （51302003）
