The invention discloses a preparation method of
microsphere friction type
silicon dioxide
colored particles for
cosmetics, which comprises the following steps: preparing
silicon dioxide
slurry by using a
sodium silicate solution and a
sulfuric acid solution as main and auxiliary additives, emulsifying
pigment to obtain
pigment slurry, and coloring the
silicon dioxide particles by using the
pigment slurry in an atomized spraying manner to obtain the
microsphere friction type
silicon dioxide colored particles. After pulpifying, pumping water into a special
storage tank for storage in a vacuumizing manner, then repeating atomization coloring and vacuumizing operations for multiple times, and finally adopting centrifugal
spray drying to obtain the
colored silicon dioxide particles. According to the invention, pigment is added by adopting a physical method, pigment slurry can be effectively added into mesopores of
silicon dioxide particles in combination with a vacuum slurrying process, and water in the pigment slurry is collected and recycled, so that zero-emission color liquid is obtained. The control of the particle size form adopts multi-layer treatment in chemical and physical
modes, so that the particle form is mainly spherical, the formation of irregular particles is effectively reduced, and the method can be used in various friction type products.