Process and apparatus for producing coated particles

Details Process and apparatus for producing coated particles Process and apparatus for producing coated particles

B - Operations, Transporting

01

J

B01J 2/00 (2006.01) B01J 2/04 (2006.01) B01J 2/16 (2006.01)

Patent

CA 2756426

The invention is directed to a process and apparatus for preparing coated particles, in particular a process for preparing particles that are coated with small particles using electrospraying. The coated particles produced according to the present invention find use for instance as catalysts or as pharmaceuticals. According to the invention a host particle is contacted in a gas stream where it is allowed to contact with one or more moving tribocharging particles, thus providing a charged host parti-cle, which is subsequently contacted with charged guest particles in an electrospraying step.

Procédé et dispositif de fabrication de particules enduites, en particulier de particules qui sont enduites elles-mêmes de très petites particules par électro-nébulisation. Lesdites particules enduites s'utilisent par exemple comme catalyseurs ou comme produits pharmaceutiques. Selon cette invention, une particule hôte est placée dans un flux gazeux dans lequel elle entre en contact avec une ou plusieurs particules mobiles triboélectriques, ce qui fait d'elle une particule hôte chargée entrant ultérieurement en contact avec des particules hôtes chargées lors d'une opération d'électro-nébulisation.

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