Tungsten processing | Britannica

In 1783 the Spanish chemists Juan José and Fausto Elhuyar obtained metallic tungsten by the reduction of its oxide with carbon it was named wolfram hence its chemical symbol, W for the mineral wolframite, from which it was extracted. In 1847, Robert Oxland patented in Britain his manufacturing process for sodium tungstate, tungstic acid, and the pure metal, and in 1857, he patented his process for …

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