TY - JOUR
T1 - Recycle of ceria-based glass polishing powder using NaOH solution
AU - Kato, Kazuhiro
AU - Yoshioka, Toshiaki
AU - Okuwaki, Akitsugu
PY - 2000
Y1 - 2000
N2 - Recycle of ceria-based glass polishing powder was investigated. A waste polishing powder was treated in a 4 mol kg-1 NaOH solution with a waste/NaOH weight ratio of 1 at 60 °C, and SiO2 and Al2O3 impurities were dissolved into the solution and removed from the polishing powder. A solution which containing the impurities was heated to 100 °C, and hydroxysodalite (Na8(AlSiO4)6(OH)24H2O) was precipitate. Thus the glass polishing powder can be regenerated and hydroxysodalite was obtained as a by-product, and excess NaOH solution was reused. However addition of Si source, such as sodium silicate was required to control the leaching and precipitation process.
AB - Recycle of ceria-based glass polishing powder was investigated. A waste polishing powder was treated in a 4 mol kg-1 NaOH solution with a waste/NaOH weight ratio of 1 at 60 °C, and SiO2 and Al2O3 impurities were dissolved into the solution and removed from the polishing powder. A solution which containing the impurities was heated to 100 °C, and hydroxysodalite (Na8(AlSiO4)6(OH)24H2O) was precipitate. Thus the glass polishing powder can be regenerated and hydroxysodalite was obtained as a by-product, and excess NaOH solution was reused. However addition of Si source, such as sodium silicate was required to control the leaching and precipitation process.
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U2 - 10.1246/nikkashi.2000.725
DO - 10.1246/nikkashi.2000.725
M3 - Article
AN - SCOPUS:80455129003
VL - 2000
SP - 725
EP - 732
JO - [No source information available]
JF - [No source information available]
IS - 10
ER -