发明名称 |
Recovery of electroluminescent phosphor from encapsulated material |
摘要 |
A method of recovering a base phosphor from encapsulated phosphors, which comprises the steps of selecting a recovery vessel including a magnetic stir bar; adding to the recovery vessel, deionized water, a first batch of concentrated hydrochloric acid and encapsulated phosphor to form a stirred suspension; heating the stirred suspension to about 90 DEG C for about 2 hours; settling the stirred suspension; decanting the mother liquor and slurrying the remaining solids with a second batch of hydrochloric acid and water; decanting and washing the remaining solids with deionized water; filtering the remaining solids to form a filter cake; heating the filter cake at 110 DEG C in air for a time sufficient to form a dried filter cake; and screening the dried filter cake through a -325 mesh screen to yield a recovered base phosphor. |
申请公布号 |
EP1215260(A3) |
申请公布日期 |
2004.03.03 |
申请号 |
EP20010130097 |
申请日期 |
2001.12.18 |
申请人 |
OSRAM SYLVANIA INC. |
发明人 |
GINGERICH, RICHARD G.W.;FAN, CHEN-WEN;KLINEDINST, KEITH A. |
分类号 |
H05B33/14;C09K11/01 |
主分类号 |
H05B33/14 |
代理机构 |
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代理人 |
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地址 |
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