著者

Akira OTSUKI Guangjun MEI Yuren JIANG Mitsuaki MATSUDA Atsushi SHIBAYAMA Jun SADAKI Toyohisa FUJITA

出版者

The Resources Processing Society of Japan

雑誌

環境資源工学 (ISSN:13486012)

巻号頁・発行日

vol.53, no.3, pp.121-133, 2006 (Released:2006-09-20)

参考文献数

13

被引用文献数

16 22

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Two-step liquid-liquid extraction methods using aqueous and organic phases for separation of red (Y2O3: Eu3+), blue (BaMgAl10O17: Eu2+) and green (CeMgAl10O17: Tb3+) fine fluorescent powders were proposed in this paper. At first, the blue powder was extracted selectively into heptane phase using a chelating agent, 2-thenoyltrifluoroacetone (HTTA, CF3COCH2COC4H3S) under alkaline pH condition. Then, chloroform was used for extracting the green powder into the chloroform phase. The red powder separating from the green powder remained in aqueous phase with a depressant, potassium sodium tartrate tetrahydrate (PST, KNaC4H4O6·4H2O). The powders could be well separated in terms of their grade and recovery. The results suggested directions for future research into the recycling of fluorescent powders from fluorescent lights.