In the paper industry, alkaline-sized paper is generally considered stronger, brighter and more resistant to aging than untreated papers. ARM & HAMMER™ brand industrial grade products provide outstanding results during the sizing process, as sodium bicarbonate is typically used to raise alkalinity.
More specifically, the (AKD) process works best at 150 ppm of bicarbonate alkalinity, with precipitated CaCO3 contributing about 60 ppm of bicarbonate alkalinity. Supplemental sodium bicarbonate is therefore required in plants with process water of 90 ppm alkalinity or less. Sodium bicarbonate is also used in neutral starch sizing by adjusting the pH to 7-8 at the final starch sizing press.
In some instances, In-Situ Recover Mining is the desired method of mining uranium. Sodium Bicarbonate can be utilized to aid in the extraction of the Uranium ore. The specific application will determine if a carbonate solution is desirable.