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Refined adsorbent magnesium polysilicate, molecular formula: xMgO·ySiO2·nH2O. The appearance is a kind of white porous spherical particles or powder with good flowability. It belongs to amphoteric compounds. The product has the functions of deacidification, deodorization, decolorization, adsorption of potassium, sodium ion and filtration medium. As polyether refined adsorbent, it has excellent adsorption and decolorization properties. Used in the last process of polyether polyol production. Its action principle is to form large particle size composite salt crystallization and small solubility in polyether product to filter and remove through the combination of the absorbent and metal ions, and at the same time make use of its porous structure to achieve decolorization and deodorization effect.
Technical indicators:
No. |
Indicator Name |
Superior Product |
First Class Product |
1 |
SiO2 % |
74±4 |
70±4 |
2 |
MgO % |
18±2 |
16±2 |
3 |
Cl - % ≦ |
0.1 |
0.1 |
4 |
SO42- % ≦ |
0.5 |
0.5 |
5 |
Loss on drying % ≦ |
8.0 |
11 |
6 |
PH in water） |
9.5-11.5 |
9.5-11.5 |
7 |
App. volume(ml/10g) |
30±5 |
27±5 |
Product application: the crude polypropylene oxide polyol was put into neutralization kettle, a small amount of pure water was added at a certain temperature, neutralization reaction was carried out after stirring, PH value of neutralizing solution was controlled within the index, and then 0.1~0.3% magnesium polysilicate adsorbents were added at the same temperature, dehydration was carried out while stirring, dehydration rate was controlled, KH2PO3 crystal grow evenly at first and then quickly. When the water is removed to the prescribed requirements, the filtration cycle is carried out, the K+（Na+）ion content of the circulating liquid is analyzed, and the filtration is carried out immediately when it meets the requirements. The filter solution is a clear and transparent polyether.
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