TECHNOLOGY FOR PRODUCTION OF ANHYDROUS SODIUM SULFATE
Sodium Sulfate is introduced in the caustic chlorine manufacturing process through Sodium Chloride. Being an impurity, Sodium Sulfate needs to be removed from the process. The same is achieved by use of Barium Chloride/Barium Carbonate. The Barium Sulfate generated during the precipitation process is filtered as wet sludge along with Calcium and Magnesium Impurities. This mixed sludge having no commercial value is then disposed to landfill. Thus valuable Barium Chloride/Barium Carbonate is consumed to generate a sludge.
Geist’s WOOW Technology selectively recovers Sodium Sulfate from the depleted and de-chlorinated brine. Geist’s WOOW Anhydrous Sodium Sulfate Recovery system is a standalone system which purifies the brine solution and produces valuable Anhydrous Sodium Sulfate in pure form. The process works in a continuous mode without addition of new chemicals. The purified return brine is sent to the saturator.
TECHNOLOGY FOR PRODUCTION OF VALUE ADDED CALCIUM AND MAGNESIUM BASED PRODUCTS
Sodium Chloride which is the main raw material for Caustic Chlorine production, contains impurities such as Calcium and Magnesium. Sodium Chloride is dissolved in water to prepare saturated brine. Prior to sending this brine to electrolvtic cells. the brine is purified by addition of Soda Ash and Caustic Soda. Addition of these chemicals leads to precipitation of Calcium and Magnesium. The precipitate thus obtained is sent to a large clarifier for sedimentation. The sediment is filtered to obtain Calcium and Magnesium containing sludge which is then sent to landfill for disposal. Thus the conventional process consumes chemicals such as Soda Ash and Caustic Soda for brine purification and in turn generates sludge.
Geist’s WOOW Technology separates Calcium and Magnesium as value added products such as Precipitated/Activated Calcium Carbonate and Magnesium Hvdroxide. These products are selectivelv recovered from brine as pure products meeting the desired specification of Indian Standards. The technology operates in continuous mode with very small foot print.