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Sodium and potassium silicates for industrial use -- Preparation of solution of products not easily soluble in boiling water and determination of matter insoluble in water
The method is applicable to products corresponding to the general formula M2O . xSiO2, where the values of x lie between 1.5 and 3.5 in the case of sodium silicates and 1.9 and 3.9 in the case of potassium silicates.
Because of the difficulty encountered in dissolving fine particles of these products, the sample is first sieved to remove these fines.
The procedure consists in:
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