Process for the production or coating of granules, apparatus...

Details Process for the production or coating of granules, apparatus... Process for the production or coating of granules, apparatus...

2002-10-15

2010-06-08

Lightfoot, Elena T (Department: 1792)

Coating processes

Particles, flakes, or granules coated or encapsulated

Fluidized bed utilized

C427S213300, C427S213310

Reexamination Certificate

active

07732008

ABSTRACT:
A process for the production or coating of granules in a fluidized bed, which includes heating a fluidized-bed gas to produce the fluidized bed, and applying a liquid medium containing a granule-forming or coating-forming compound, or at least one reaction component therefore, by spraying particles located in the fluidized bed and at a same time vaporizing an organic solvent contained in the liquid medium, said particles having a smaller mean diameter than that of particles to be produced. The process also includes partial condensation of an organic solvent from at least a portion of a fluidized-bed waste gas leaving the fluidized bed, and re-heating the fluidized bed-gas leaving the condensation device and reintroducing the re-heated gas into the fluidized bed.

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H. Uhlemann, Chem.-Ing.-Tech. vol. 62, nr. 10. pp. 822-834, “Kontinuierliche Wirbelschicht-Sprühgranulation”, 1990.
K. Ruempler, Chemische Produktion, pp. 18-21, “Granulattrocknung in Der Wirbelschicht”, Jun. 1992.
U.S. Appl. No. 10/935,595, filed Sep. 8, 2004, Harthun, et al.
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U.S. Appl. No. 10/270,114, filed Oct. 15, 2002, Harthun, et al.

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