Fluid bed apparatus for coating solid particles
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United States of America Patent
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Oct 21, 2014
Grant Date -
May 27, 2010
app pub date -
Jul 6, 2007
filing date -
Jul 6, 2007
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Abstract
A fluid bed apparatus for coating solid particles. The apparatus includes a housing having upwardly extending walls surrounding a perforated base plate, a nozzle for atomizing a coating liquid, the nozzle being provided in the upwardly extending walls, and a device for providing fluidisation gas through the perforations of the base plate for the maintenance of a fluidised layer. The coating liquid nozzle is provided in a channel for co-current introduction of a dispersion gas, the channel debouching into the fluid bed through an orifice having a radius of 5 mm or more. The apparatus provides for the production of particles having smooth surfaces, high yield and a low tendency to form agglomerates.
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