Polyoxometalates (POMs)
POMs are condensed products which consist of inorganic oxyacids
of P, Si, W, Mo, V, etc. They are crystals which have a Keggin structure,
strong acidity, and oxidation power, thus making them attractive
catalysts for many kinds of organic reactions. The following products
have been developed with new proprietary technology using superior
quality control. They are high in purity and are very stable.
1. Phospho Tungstic AcidH3[PW12O40]•nH2O(n_30)
|
Grade |
Chemical Composition |
| |
WO3
(%)
|
P
(%)
|
Na
(ppm)
|
NH4
(ppm)
|
Fe
(ppm)
|
Cl
(ppm)
|
SO4
(ppm)
|
NO3
(ppm)
|
Hvy Metals
as Pb (ppm)
|
|
PW12
|
80 min.
|
0.87min
|
20 max
|
20 max
|
10 max
|
10 max
|
10 max
|
10 max
|
10 max
|
2. Silico Tungstic AcidH4[SiW12O40]•nH2O(n_30)
|
Grade |
Chemical Composition |
| |
WO3
(%)
|
P
(%)
|
Na
(ppm)
|
NH4
(ppm)
|
Fe
(ppm)
|
Cl
(ppm)
|
SO4
(ppm)
|
NO3
(ppm)
|
Hvy Metals
as Pb (ppm)
|
|
SiW12
|
79 min.
|
0.80min
|
20 max
|
20 max
|
10 max
|
10 max
|
10 max
|
10 max
|
10 max
|
3. Phospho Molybdic AcidH3[PMo12O40]•nH2O(n_30)
|
Grade |
Chemical Composition |
| |
MoO3
(%)
|
P
(%)
|
Na
(ppm)
|
NH4
(ppm)
|
Fe
(ppm)
|
Cl
(ppm)
|
SO4
(ppm)
|
NO3
(ppm)
|
Hvy Metals
as Pb (ppm)
|
|
PMo12
|
72 min.
|
1.29min
|
20 max
|
20 max
|
10 max
|
10 max
|
10 max
|
10 max
|
10 max
|
4. Sodium Phospho MolybdateNa3[PMo12O40]•nH2O(n_30)
|
Grade |
Chemical Composition |
| |
MoO3
(%)
|
P
(%)
|
Na
(ppm)
|
NH4
(ppm)
|
Fe
(ppm)
|
Cl
(ppm)
|
SO4
(ppm)
|
NO3
(ppm)
|
Hvy Metals
as Pb (ppm)
|
|
NaPMo12
|
71 min.
|
1.25min
|
2.0~3.5
|
20 max
|
30 max
|
20 max
|
50 max
|
50 max
|
20 max
|
The following acids can be produced on demand.
5. Phospho Tungsto-Molybdic AcidH3[PW12-xMoxO40]•nH2O
(0<x<12, n_30)
|
Grade |
Chemical Composition |
| |
Na
(ppm)
|
NH4
(ppm)
|
Fe
(ppm)
|
Cl
(ppm)
|
SO4
(ppm)
|
No3
(ppm)
|
Hvy Metals as Pb (ppm)
|
|
PW12-xMox
|
20 max
|
20 max
|
10 max
|
10 max
|
20 max
|
10 max
|
10 max
|
Standard production has a ratio of x=6.
6. Phospho Vanado-Molybdic AcidH15-x[PV12-xMoxO40]•nH2O(6<x<12,
n_30)
|
Grade |
Chemical Composition |
| |
Na
(ppm)
|
NH4
(ppm)
|
Fe
(ppm)
|
Cl
(ppm)
|
SO4
(ppm)
|
No3
(ppm)
|
Hvy Metals as Pb (ppm)
|
|
PV12-xMox
|
20 max
|
20 max
|
10 max
|
10 max
|
20 max
|
10 max
|
10 max
|
Standard production yields ratios of x=11,10,8,6
Remarks:
1. Some impurities can be negotiated per client requirements.
2. Other POMs and their salts may be available.
| 
