Patent ID: 7943114

Claim:
A layered titanic acid compound in an orthorhombic layer structure represented by the following composition formula: H 4x/3 Ti 2-x/3 O 4 .n H 2 O, wherein x is 0.57-1.0 and n is 0-2, and said layered titanic acid compound is a single phase, which is obtainable by the process comprising: producing alkali metal titanate by mixing alkali metal oxides represented by M 2 O and M′ 2 O, where M and M′ are mutually different kinds of alkali metals, or compounds decomposable to M 2 O and M′ 2 O by heating with titanium dioxide or a compound capable of producing titanium dioxide by heating in a molar ratio of M/M′/Ti of 3/1/5-3/1/11, followed by firing at a temperature of 500-1100° C., and contacting the alkali metal titanate with an aqueous acid solution.