content_image/943201.jpg content_image/943184.jpg content_image/943203.jpg
# c19) United States c12) Patent Application Publication 

# Iyi et al. 

# (54) METHOD FOR PRODUCING ANION-EXCHANGING LAYERED DOUBLE HYDROXIDE AND METHOD FOR SUBSTITUTING CARBONATE ION OF LAYERED DOUBLE HYDROXIDE 

(75) Inventors: Nobuo Iyi, Ibaraki (JP); Hirohisa Yamada, Ibaraki (JP); Takayoshi Sasaki, Ibaraki (JP) 

(73) Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba-shi, Ibaraki (JP) 

(21) Appl. No.: 13/982,153 

(22) PCT Filed: Jan.18,2012 

(86) PCT No.: PCT I JP2012/050976 § 371 (c)(l), (2), ( 4) Date: Oct. 8, 2013 

## (30) Foreign Application Priority Data 

<img src='content_image/943201.jpg'>

<img src='content_image/943184.jpg'>

(51) Int. Cl. B0JJ41/10 (2006.01) 

(52) U.S. Cl. CPC ....................................... B0JJ 41110 (2013.01) USPC .. .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... ... .. ... ... 252/184 

## (57) ABSTRACT 

A method for producing an anion-exchanging LDH using a carbonate ion-type layered double hydroxide represented by general formula Qa T(OH)zCCO$_{3 }$ 2 -) 0 5 _ $_{61}$iX-)$_{6}$ .nH$_{2}$O (where 1.8sas4.2, z=2(a+l), 0sb<0.5, 0sns5, Q represents divalent metal, T represents trivalent metal, and x- is an element or atom group that turns to monovalent anion) as a starting material, with value b increased at least to 0.5 and a maximum of 1, wherein the carbonate ion-type layered hydroxide is made to contact an alcoholic solution containing an acidic compound(MXm) (wherem=l, 2, or3; whenm=l, Mis Hor NRR’R".H, withR, R’, andR" being Hor organic group; and when m=2 or 3, M is a metal salt, namely a divalent or trivalent metal). 

US 20140021404Al 

# c10) Pub. No.: US 2014/0021404 Al 

# (43) Pub. Date: Jan. 23, 2014 

## Publication Classification 

<img src='content_image/943203.jpg'>

