Solubility of Li₂WO₄ under Hydrothermal Conditions

M. A. Urusova and V. M. Valyashko

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia

Received June 5, 2012

Abstract—Experimental studies of water solubilities of Li₂WO₄ at temperatures up to 450C and pressures up
to 147 MPa show that this salts with water forms a type 2 binary system, where the solubility of the salt under
the vapor pressure decreases as temperature rises to end at the critical end-point p (g=l–s) near the H₂O criti-
cal temperature. High-temperature Li₂WO₄ solutions are shown to not react with silica, but they cause corrosion
of metallic walls of an autoclave accompanied with gas evolution and formation of dark-colored solid corrosion
products.

DOI: 10.1134/S0036023613050240

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