Patent ID: 7740828

Claim:
A multimetallic anionic clay (MAC) characterized in that the laminar metallic hydroxides have at least three different metal cations forming part of the anionic clay's layers and have the following formula: [M(II) 1−x M(III) x (OH) 2 ](A n− x/n ). m H 2 O, where [M(II)]/[(M(III)], is the molar ratio between the divalent cations and the trivalent cations and is 0.5-10; M(II) represents one or a combination of two or more different Group 2, 6-12 or 14 elements with a valence equal to two; M(III) represents a combination of two or more different elements selected from the group consisting of Group 4-9 or 13 elements, Ce, and La, with a valence equal to 3 and where each M(III) is different from M(II), A represents any anion located between the layers composed of the aforementioned cations, n− represents the interlaminar anion's negative electronic charge and may be from −1 to −8, m represents the water molecules present as hydration water or as water present in the interlaminar region and can be from 0-2, x=0.09 to 0.67.