Patent ID: 10843166

Abstract:
Adsorbent particle includes iron oxyhydroxide as a main component, wherein 90% or more of volume of particle is constituted of a granular crystal having a crystal grain size of 20 nm or less or a columnar crystal having a width of 10 nm or less and length of 30 nm or less and particle has BET specific surface area of 250 m2/g or more. Above adsorbent particle is produced by a method including a step of generating iron oxyhydroxide by adding base represented by YOH (wherein Y represents a monovalent atom or atomic group) to solution including at least one selected from trivalent iron compounds represented by FeX3 (wherein X represents a monovalent atom or atomic group other than OH) while adjusting pH to pH 3 to 6, wherein solution has total concentration of FeX3, YOH and other electrolytes of 10% by mass or more at completion of the step.