USE OF HIGH-ABSORPTION-CAPACITY PRECIPITATED SILICA FOR THE PRODUCTION OF A COLORANT BY MEANS OF IMPREGNATION WITH AN INORGANIC PIGMENT, THE COLORANT THUS OBTAINED AND THE APPLICATION THEREOF IN THE COLOURING OF CERAMIC MATERIALS

摘要

The invention relates to the use of precipitated silica in the form of substantially spherical beads with a mean size of at least 50  m, which have a dop oil uptake of at least 260 ml / 100g, as starting material for the production of a colorant by impregnation of said silica with an inorganic pigment in the form of a soluble salt, in particular with an inorganic pigment based on iron sulfate soluble.elle also relates to a coloring agent which can be obtained by calcination, and then possibly crushing, a precipitated silica in the form of substantially spherical beads with a mean size of at least 50  m, which have a dop oil uptake of at least 260 ml / 100g, previously impregnated with the aid of an inorganic pigment in the form of a soluble salt, in particular an inorganic pigment based on iron sulfate soluble.le colorant obtained may be used for the coloration of ceramic materials, such as tiles or the floor tiles of ceramic, and of materials with a hydraulic binder.