C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
23/192, 53/369
C22B 3/00 (2006.01) B01J 20/10 (2006.01) C01B 33/12 (2006.01) C01F 7/22 (2006.01) C02F 1/28 (2006.01) C22B 3/06 (2006.01)
Patent
CA 1150063
A B S T R A C T Method of leaching of the metal contents in natural silicates by means of mineral acids for production of a metal-containing leaching liquid and a solid residue where the silicate in first crushed to a grain size above 0.1 mm and leached for such a period that there is formed a solid residue consisting chiefly of silica where the separate particles or grains do not change the size or shape in the course of the leaching process. The silicate to be leached may be anorthosite or olivinrich rock and the solid residue from the leaching process may be utilized for building material, as a source for silicon in industrial processes especially ceramic and chemical industry, as catalysator or carrier of catalysators or as absorbing material.
345560
Gjelsvik Norvald
Torgersen Jan H.
Elkem-Spigerverket A/s
Macrae & Co.
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