PREPARATION OF A COMPOSITION OF A SWELLING T.O.T.-T.O.T. INTERLAYER

摘要

The invention relates to a method for preparing a composition comprising mineral particles, that is swelling T.O.T.-T.O.T. interlayer particles, formed by interlayering between: at least one non-swelling mineral phase formed by a stack of elementary laminae of the phyllogermanosilicate 2/1 type and of formula - (Si_xGe_1-x)₄M₃O₁₀(OH)₂ -, and at least one swelling mineral phase formed by a stack of elementary laminae of the phyllogermanosilicate 2/1 type and at least one interlaminar space between two consecutive elementary laminae, said swelling mineral phase being of formula - (Si_x Ge_1-x)₄ M_3-eO₁₀(OH)₂, (M²⁺)e'. nH₂O -. In order to prepare said composition, a gel containing silicon, germanium and metal, of chemical formula - (Si_xGe_1-x)₄ M₃O₁₁, n'H₂O -, in the liquid state, is is subjected to a hydrothermal treatment which is carried out over a defined period of time and at a temperature of between 150°C and 300°C, said time and temperature being selected according to desired structural characteristics for the swelling T.O.T.-T.O.T. interlayer particles to be prepared.