Study For Recycling Of Ceria-Based Glass Polishing Powder Ii - Recovery Of Hydroxysodalite From The Alkali Waste Solution Containing Sio2 And Al203

The recovery of SiO2 and Al2O3 from the alkali waste solution of the glass polishing powder recycling process was investigated. The effects of seed crystal, stirring speed, and temperature were also studied. Hydroxysodalite was obtained from the waste solution by heating to 80-100 deg C. Addition of seed crystal shortened the reaction time and made easy the recovery of hydroxysodalite. The hydroxysodalite deposition process was rate-determined by the chemical reaction step, and increased temperatures was also effective in shortening a reaction time.