CAS NO.: 12027-38-2 Molecular Formula: H4O40SiW12 Molecular Weight: 2896.19000
Appearance: White powder Assay: ≥99.5% Lose on drying: 0.21 Boiling Point: 100ºC at 760 mmHg Melting point: 53 °C (127 °F; 326 K) Properties: Soluble in water, ethanol and ether. Uses: Made of heavy liquid for mineral flotation. Precipitation and determination of alkaloids. Basic aniline dye mordant. Application:
Silicotungstic acid is used to manufacture ethyl acetate by the alkylation of acetic acid by ethylene:
C2H4 + CH3CO2H → CH3CO2C2H5
It has also been commercialized for the oxidation of ethylene to acetic acid:
C2H4 + O2 → CH3CO2H
This route is claimed as a "greener" than methanol carbonylation. The heteropoly acid is dispersed on silica gel at 20-30 wt% to maximize catalytic ability.
It has also recently been proposed as a mediator in production of hydrogen through electrolysis of water by a process that would reduce the danger of explosion while allowing efficient hydrogen production at low current densities, conducive to hydrogen production using renewable energy. Description About Silicotungstic Acid CAS 12027-38-2:
Silicotungstic acid is the most commonly encountered heteropoly acid. It is used as a catalyst in the chemical industry. Storage: This product should be sealed in a cool dry place.