Method for recovering europium hydroxide from discarded displays

The ownership of color televisions in China increases rapidly. In 1980, 9.02 million televisions are owned by Chinese people and the ownership progressively increases by 10-20 million annually. The number of color televisions owned by Chinese people is 185 million at the end of 1990, and is 400 mill...

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Bibliographische Detailangaben
Hauptverfasser:	CAO XUELING, CHEN ZUOJUN, QUAN TINGLAN, ZHAO WENZHUO, CAO XUEHUI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT DISPOSAL OF SOLID WASTE GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS PERFORMING OPERATIONS RECLAMATION OF CONTAMINED SOIL SOIL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING
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Beschreibung
Zusammenfassung:	The ownership of color televisions in China increases rapidly. In 1980, 9.02 million televisions are owned by Chinese people and the ownership progressively increases by 10-20 million annually. The number of color televisions owned by Chinese people is 185 million at the end of 1990, and is 400 million in 2009. Generally, a television is used for 6-8 years, and then 200 million televisions fall into disuse annually. After metal devices in the televisions are removed and metals are recovered, a large number of displays are thrown away. The displays not only occupy large spaces, but also can release toxic substances and seriously pollute the environment if the displays are broken by accident. According to a method for recovering europium hydroxide from discarded displays, europium hydroxide is recovered by process steps of dedusting, smashing, alkaline hydrolysis, separation, evaporation, neutralization and the like, thereby alleviating pollution and achieving comprehensive utilization of wastes. The method is