METHOD OF PRODUCING BARIUM CHLORIDE FROM SLIME AFTER LEACHING OF BARIUM SULFIDE FUSION CAKE Russian patent published in 2002 - IPC

FIELD: chemical industry. SUBSTANCE: method includes introduction of 302.6 kg of fluid after the second stage of slime treatment into 117.8 kg of aqueous suspension of slime after water leaching of barium sulfide; supply of gas containing CO₂. Treatment is carried out in reactor with continuous agitation at 95-104 C to obtain pH 7.5-8. Produced suspension is separated. Solution of BaCl₂ is processed into crystalline product. Slime is directed for the second stage of treatment with distilled fluid (waste of soda ash production) at 40-60 C for 40-60 min. Obtained suspension is separated. Slime is directed for rendering it harmless. Solution is directed for treatment of slime aqueous suspension at the first stage. Recovery degree BaCl₂ is 83.6-93.7%. EFFECT: reduced consumption of precious reagents and energy consumption by a factor of 2. 2 cl