abstract |
Raw material is crushed, mixed with an alkaline soln. - of 90-110 g/l R2O, where R = Na(+) or K(+), followed by adjusting the mol. ratio 5 Na2O:7.5-8.4 Al2O3, heating to 900-100 deg.C for up to 24 hrs., adjusting the ratio of 2 liq. pts.:1 solid pt., settling and filtering off the prod. The alkaline filtrate is returned to the start of the process. - (-pp (-pp Dwg.No. 0/0) |