Patent ID: 9540517
Date: 2017-01-10
CPC Classifications: C01B,C01P,C09C

Claim:
1. A method for preparing a composition comprising silicate mineral particles which have coloring properties, wherein: a talcose composition, comprising phyllosilicate mineral particles is selected from the group consisting of: M denoting at least one divalent metal and having the formula Mg x being a real number of the interval [0; 1], and M denoting at least one divalent metal and having the formula Mg M′ x being a real number of the interval [0; 1], ε being a real number of the interval [0; 3[ and denoting a cation deficit of said elementary lamellae, ε′ being a real number of the interval [0; 3[ and denoting a proportion of interfoliar cation(s) M′ m being a real number of the interval [1; 3] and denoting a cation charge of the cation M′ n referring to a number of molecule(s) of water associated with said particles, said silicate mineral particles having a thickness of less than 100 nm and the largest dimension of which is less than 10 μm, bringing said talcose composition into contact with a solution, named a coloring solution, comprising cations, named coloring cations, of at least one element chosen from the transition metals, the lanthanides and the actinides, in order to obtain a talcose composition comprising colored silicate mineral particles.