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Refined adsorbent magnesium aluminum silicate (general formula: [MX2+My3+An-(OH)n]·mH2O, is white spherical particles or powder with porous structure and good fluidity. It is a solid amphoteric compound. This product can remove acid, odour, and colour, adsorb potassium and sodium ions, and filter media. As a polyether refined adsorbent, it exhibits excellent adsorption and decolorization performance. It is used in the last section in the polyether polyols production process.
No. |
Indicator Name |
Index |
1 |
SiO2 % |
55±4 |
2 |
MgO% |
16±2 |
3 |
Al2O3% |
16±4 |
4 |
Cl - % ≦ |
0.1 |
5 |
SO42- % ≦ |
0.5 |
6 |
Loss on drying % ≦ |
8.0 |
7 |
PH in water5% |
10±1 |
8 |
App. volume(ml/10g) |
36±4 |
Production application: the crude polyether polyol was put into the neutralization kettle. A small amount of pure water is added at a certain temperature. the neutralization reaction was carried out after stirring. The solution is controlled to a given pH value. Magnesium aluminum silicate is added at the same temperature. The solution is kept at the temperature for 1.5~2 h before vacuum distillation for dehydration. A filtration cycle doesn’t begin until the water content reaches a given value. The K+(Na+) ion content of the solution is determined until it reaches a given value. The solution is filtered immediately, and the filtrate is clear and transparent polyether.
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