GENPHOAL TECHNOLOGY(B.V.I.)CO., LTD

Model Number: GK-013 Brand Name: GENPHOAL Key Specifications/Special Features: High purity tungsten trioxide catalysts for 99.95 %Tungsten trioxideTungstic anhydrideTungsten oxideTungstic oxideTungsten trioxideVolfram trioksidTrioxid de wolframWolfram oxideP……0.004Fe……0.005
Cu……0.005
As……0.002
Mo……0.005
NH4……0.01
CL……0.003
Pb……0.002
S……0.005
NaOH……0.01
Tungsten oxide, also known as tungsten trioxide or tungstic anhydride, WO3, is a chemical compound containing oxygen and the transition metal tungsten
Obtained as an intermediate in the recovery of tungsten from its minerals
[1] Tungsten ores are treated with alkalis to produce WO3
Further reaction with carbon or hydrogen gas reduces tungsten trioxide to the pure metal

2 WO3 + 3 C → 2 W + 3 CO₂ (high temperature)
WO3 + 3 H2 → W + 3 H₂O (550-850 °C)
Tungsten(VI) oxide occurs naturally in form of hydrates, which include minerals: tungstite WO3·H₂O, meymacite WO3·2H₂O and hydrotungstite (of same composition as meymacite, however sometimes written as H2WO4)
These minerals are rare to very rare secondary tungsten minerals