Patent ID: 8758853

Claim:
A process for producing a composite particle comprising a host particle having adhered to its surface one or more smaller guest particles, which process comprises the steps of: (i) bringing said host particle in a gas stream and allowing it to contact with one or more moving tribocharging particles, thus providing a charged host particle; (ii) separating said charged host particle from said tribocharging particles; and (iii) subjecting said charged host particle to an electrospraying step, in which said guest particles are provided with a charge that is opposite to the charge of said charged host particle, followed by contacting said guest particles with said host particle, whereby said guest particles adhere to said host particle, thus forming said composite particle, wherein step (i) is carried out in a fluidized bed wherein said host particle is suspended, wherein said gas stream is fed to the bottom of said fluidized bed, and wherein said tribocharging particles are moved by the flow of said gas, and wherein the charged host particle is fed from the fluidized bed to an electrospraying zone in a gas flow through a channel.