Sulfuric Acid → Indium sulfate

Participants

Reaction Steps

Furthermore, Japanese Patent Application Laid-open No. 2002-69684 (hereinafter, referred to as Patent Document 3) discloses an indium recovering method including a step of dissolving an ITO indium-containing scrap with a hydrochloric acid to obtain an indium chloride solution; a step of adding a sodium hydroxide solution into the indium chloride solution to remove tin contained in the scrap as tin hydroxide and further adding a sodium hydroxide solution to obtain indium hydroxide; a step of filtering indium hydroxide and thereafter adding a sulfuric acid to obtain indium sulfate; and performing electrowinning of indium.

Provenance & Evidence