Adsorbent material and method for producing crystalline silicotitanate

Patent metadata

Field	Value
Publication number	US-2016107140-A1
Application number	US-201514787516-A
Country	US
Kind code	A1
Filing date	Mar 24, 2015
Priority date	Mar 27, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

There is provided an adsorbent material having adsorptive removal properties of Cs and Sr in seawater, and a method for producing a crystalline silicotitanate suitable for the adsorbent material. The adsorbent material includes one selected from crystalline silicotitanates represented by Na 4 Ti 4 Si 3 O 16 .nH 2 O, (Na x K (1-x) ) 4 Ti 4 Si 3 O 16 .nH 2 O and K 4 Ti 4 Si 3 O 16 nH 2 O wherein x represents a number of more than 0 and less than 1 and n represents a number of 0 to 8; and one selected from titanate salts represented by Na 4 Ti 9 O 20 .mH 2 O, (Na y K (1-y) ) 4 Ti 9 O 20 .mH 2 O and K 4 Ti 9 O 20 .mH 2 O wherein y represents a number of more than 0 and less than 1 and m represents a number of 0 to 10. The adsorbent material is produced by a method for producing a crystalline silicotitanate in which a silicic acid source, a sodium compound and/or a potassium compound, titanium tetrachloride, and water are mixed to obtain a mixed gel, and the mixed gel is subjected to a hydrothermal reaction.

First claim

1 - 19 . (canceled)

20 . An adsorbent material for cesium or strontium, comprising: at least one selected from crystalline silicotitanates represented by the general formulae: Na 4 Ti 4 Si 3 O 16 .nH 2 O, (Na x K (1-x )) 4 Ti 4 Si 3 O 16 .nH 2 O and K 4 Ti 4 Si 3 O 16 .nH 2 O wherein x represents a number of more than 0 and less than 1 and n represents a number of 0 to 8; and at least one selected from titanate salts represented by the general formulae: Na 4 Ti 9 O 20 .mH 2 O, (Na y K (1-y) ) 4 Ti 9 O 20 .mH 2 O and K 4 Ti 9 O 20 .mH 2 O wherein y represents a number of more than 0 and less than 1 and m represents a number of 0 to 10.

21 . The adsorbent material according to claim 20 , wherein when the adsorbent material is subjected to an X-ray diffractometry using a Cu-Kα as an X-ray source and in a diffraction angle (2θ) range of 5 to 80°, one or more peaks of the crystalline silicotitanate are observed, and one or more peaks of the titanate salt are observed; and
a ratio of a height of a main peak of the titanate salt to a height of a main peak of the crystalline silicotitanates is 5% or higher and 70% or lower.

22 . The adsorbent material according to claim 20 , wherein when the adsorbent material is subjected to an X-ray diffractometry using a Cu-Kα as an X-ray source and in a diffraction angle (2θ) range of 5 to 80°, the main peak of the titanate salt is observed in a diffraction angle (2θ) of 8 to 10°.

23 . The adsorbent material according to claim 20 , comprising Na 4 Ti 4 Si 3 O 16 .nH 2 O and K 4 Ti 4 Si 3 O 16 .nH 2 O, or (Na x K (1-x) ) 4 Ti 4 Si 3 O 16 .nH 2 O as the crystalline silicotitanate.

24 . The adsorbent material according to claim 20 , wherein the adsorbent material is in a powdery form or a granular form.

Assignees

• Nippon Chemical Ind

Inventors

• Miyabe Shinsuke
• Kinose Yutaka
• Kikuchi Masahiro
• Sakamoto Takeshi

Classifications

• B01J20/30

  Processes for preparing, regenerating, or reactivating · CPC title

• B01J20/3021

  Milling, crushing or grinding · CPC title

• B01J20/28023

  Fibres or filaments (fibres or filaments in the form of membranes B01J20/28038; B01J20/28007 takes precedence) · CPC title

• C01G23/005

  Alkali titanates · CPC title

• C02F1/281

  using inorganic sorbents · CPC title