Research on Production Process Parameters of High-purity APT by Ammonia Dissolving

The research on ammonia dissolving after thermal dissociation and direct ammonia dissolving shows that APT solid is thermally dissociated for 50 minutes at temperature of 280±5℃, and then 1:3 ammonia solution of 200 mL is added to dissolve for 6 hours at temperature of 95℃, leaching efficiency is 85.1%. Dissociation time has a little influence on S (Fe)/WO3. Leaching efficiencyof ammonia dissolving after thermal dissociation is higher than that of direct ammonia dissolving, but amounts of S ( Fe ) / WO3are basically similar.

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