Study for recycling of ceria-based glass polishing powder

Citation
K. Kato et al., Study for recycling of ceria-based glass polishing powder, IND ENG RES, 39(4), 2000, pp. 943-947
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN journal
0888-5885 → ACNP
Volume
39
Issue
4
Year of publication
2000
Pages
943 - 947
Database
ISI
SICI code
0888-5885(200004)39:4<943:SFROCG>2.0.ZU;2-Z
Abstract
The recycling of ceria-based glass polishing powder by alkali treatment was investigated. Major impurities in the waste, a SiO2 component from fine gl ass powder and an Al2O3 component from coagulating agents, could be removed easily at 50-60 degrees C in a 4 mol kg(-1) NaOH solution within 1 h. Thes e impurities react with NaOH to precipitate as zeolite at higher temperatur e. Thus, it is expected that a recycling process which can regenerate polis hing powder and convert SiO2 and Al2O3 components into zeolite can be desig ned.