Adsorbent and method for producing same

Patent metadata

Field	Value
Publication number	US-2018008954-A1
Application number	US-201615545533-A
Country	US
Kind code	A1
Filing date	Jan 13, 2016
Priority date	Jan 26, 2015
Publication date	Jan 11, 2018
Grant date	—

Abstract

Provided is an adsorbent for removal of iodide ions and iodate ions, which exhibits excellent adsorption performance of iodide ions and iodate ions. An adsorbent according to the present invention comprises cerium(IV) hydroxide and a poorly soluble silver compound. It is preferable that the content of cerium(IV) hydroxide is 50 % by mass or more and 99 % by mass or less, and the content of the poorly soluble silver compound is 1 % by mass or more and 50 % by mass or less. It is also preferable that the poorly soluble silver compound is at least one selected from silver zeolite, silver phosphate, silver chloride, and silver carbonate.

First claim

1 . An adsorbent for removal of iodide ions and iodate ions, comprising cerium(IV) hydroxide and a poorly soluble silver compound.

2 . The adsorbent according to claim 1 , wherein the content of cerium(IV) hydroxide is 50% by mass or more and 99% by mass or less, and the content of the poorly soluble silver compound is 1% by mass or more and 50% by mass or less.

3 . The adsorbent according to claim 1 , wherein the poorly soluble silver compound has a solubility in 100 g of water at 20° C. of 10 mg or less.

4 . The adsorbent according to claim 1 , wherein the poorly soluble silver compound is at least one selected from silver zeolite, silver phosphate, silver chloride, and silver carbonate.

5 . The adsorbent according to claim 1 , wherein the adsorbent is a granular product having a particle size of 200 μm or more and 1000 μm or less.

6 . A method for producing the adsorbent according to claim 1 , the method comprising the steps of:
providing a mixed shiny containing a poorly soluble silver compound and wet-ground cerium(IV) hydroxide; subjecting the mixed slurry to solid-liquid separation and then drying the resulting solid to obtain a dry product; and grinding the dry product to obtain a ground product.

Assignees

• Nippon Chemical Ind

Inventors

• Miyabe Shinsuke
• Kinose Yutaka
• Kozasu Kenta
• Sakamoto Takeshi
• Satou Kiyoshi
• Sugihara Kaori

Classifications

• B01J20/06 Primary

  comprising oxides or hydroxides of metals not provided for in group B01J20/04 · CPC title

• G21F9/12

  by absorption; by adsorption; by ion-exchange · CPC title

• B01J20/3021

  Milling, crushing or grinding · CPC title

• B01J20/0233

  Compounds of Cu, Ag, Au · CPC title

• B01J20/0292

  Phosphates of compounds other than those provided for in B01J20/048 · CPC title