Clear aqueous solutions of sodium silicate

Details Clear aqueous solutions of sodium silicate Clear aqueous solutions of sodium silicate

C - Chemistry, Metallurgy

01

D

C01D 13/00 (2006.01)

Patent

CA 2203486

Disclosed is a method of making a clear aqueous solution of sodium silicate from a mixture of silicon dioxide, sodium carbonate, and water. A melt is formed of the mixture of silicon dioxide and sodium carbonate, the melt is cooled to form solid sodium silicate, the solid sodium silicate is mixed with water and a sequestering agent to form a mixture that contains about 10 to about 2000 ppm of metallic impurities, and the mixture is heated under pressure to dissolve this sodium silicate in the water.

Méthode pour obtenir une solution aqueuse claire de silicate de sodium à partir d'un mélange de dioxyde de silicium, de carbonate de sodium et d'eau. Une masse fondue du mélange de dioxyde de silicium et de carbonate de sodium est formée, puis refroidie pour donner du silicate de sodium solide; ce silicate est mélangé avec de l'eau et un agent séquestrant pour former un mélange renfermant environ 10 à 2000 ppm d'impuretés métalliques; le mélange est enfin chauffé sous pression pour dissoudre le silicate de sodium dans l'eau.

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