Patent ID: 8623320

Claim:
A Mg—Ti—Al composite metal hydroxide represented by Formula 1 below: Mg a Ti b Al c (OH) d (A 1 n− ) e (A 2 m− ) f x H 2 O [Formula 1] wherein A 1 n− and A 2 m− are respectively anions having valences of n and m, a/c ranges from 1 to 5, and b, c, d and x are numbers satisfying the conditions of 0<b≦5, 0<c≦5, 0<d and 0≦x<5, while e and f are numbers satisfying the condition of 1≦ne+mf≦5; wherein A 1 n− and A 2 m− are both present in the Mg—Ti—Al composite metal hydroxide, and are different anions from each other; and wherein neither A 1 n− nor A 2 m− is OH.