| 摘要 |
The present invention provides a process for adhering a liquid to a particulate substrate. The process comprises the steps of: a) providing an apparatus which can create an oscillating magnetic field within a chamber, b) providing particulate magnetic material within the chamber of said apparatus while said oscillating field is active, c) having in the chamber within the oscillating magnetic field a liquid coating material and a particulate substrate to be coated with said liquid, d) and having said magnetic field form a fluidized bed of at least said particulate magnetic material, said liquid coating material coating the surface of the particulate substrate, and e) optionally continuously collecting the coated particulate substrate. The particulate magnetic material may be added to the chamber before or after the magnetic field has been activated to oscillate. The field may be active when the magnetic particles are added, and the field may be activated only after the magnetic particles are present as a non-fluidized sedentary bed. The liquid may likewise be added at any time. The liquid coating material may be added before the field is activated, or after the field is activated. The liquid may be added before the magnetic particles are added, at the same time or after the magnetic particles are added. The magnetic particles may provide the only particulate surface onto which the liquid is to be coated, or separate particulates may be used along with the magnetic particulate materials. The magnetic particulates may be included along with the non-magnetic particulates in the final desired product, or the coated magnetic particles may be easily separated from the non-magnetic particles by magnetic filtering or screening. This process provides a significant benefit in a liquid coating process by reducing the potential for waste and allowing easy recycling of coating material.
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