Method for indium sulfide from indium-containing material and method for recovering indium

摘要

PPROBLEM TO BE SOLVED: To provide a method for sulfurizing indium from an indium-containing material by which reaction efficiency of a sulfurizing agent can be increased and separability of indium can be dramatically improved and, further, reduction in the additive quantity of the sulfurizing agent, reduction in the scale of a detoxifying facility for the residual sulfurizing agent and reduction in the amount of NaOH used in the detoxifying facility are made possible, and to provide a method for recovering indium. PSOLUTION: The method for sulfurizing indium from an indium-containing material is characterized in that, in a method for recovering indium from an indium-containing acid solution, at least either of NaSH and NaSB2/SBS is added until the redox potential of the acid solution becomes -20 mV to 300 mV to precipitate indium in the form of a sulfide from the acid solution. The method for recovering indium comprises a step of using the above sulfurizing precipitation process. PCOPYRIGHT: (C)2007,JPO&INPIT