Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Fluidized bed
Reexamination Certificate
1999-10-01
2002-07-09
Johnson, Jerry D. (Department: 1764)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Fluidized bed
C422S139000, C422S140000, C422S198000
Reexamination Certificate
active
06416721
ABSTRACT:
TECHNICAL FIELD
The present invention relates generally to moving bed reactors, and more particularly to fluidized bed reactors.
BACKGROUND
Fluidized bed reactors are reactors in which a particulate composition, e.g. a powder, is floated inside a reaction vessel on a cushion of fluidizing medium, e.g. air or other gaseous medium, such that the particulate becomes quasi-fluid in character. Fluidized bed reactors find use in a variety of different industries, including the petrochemical, silicon based and pharmaceutical industries.
Because of their importance, a variety of different fluidized bed reactors have been designed to meet the particular needs of a given application. For example, a number of different fluidized bed reactor designs have been developed to specifically be used in the production of high purity silicon for the computer industry and related fields. Examples of various fluidized bed reactor designs are provided in U.S. Pat. Nos. 4,904,452; 5,006,317; 5,165,908; 5,171,734; 5,227,195; 5,374,413; and 5,810,934, the disclosures of which are herein incorporated by reference.
Despite the abundance of fluidized bed reactor designs known in the art, there is continued interest in the development of new reactor designs that provide for improvements, at least with respect to one or more particular applications.
SUMMARY OF THE INVENTION
Fluidized bed reactors having a centrally positioned heating means, e.g. a susceptor rod, as well as methods for their use, are provided. During operation of the reactor, the heating means is at least partially immersed in a fluidized particle bed in said reactor. The subject reactors are further characterized by having a temperature gradient within the reactor vessel during use. The subject reactors find use in a variety of different applications.
It is accordingly an object of the invention to provide a fluidized bed reactor with a centrally positioned heating means that is at least partially immersed in a fluidized particle bed.
It is another object of the invention to provide methods of using the subject fluidized bed reactors.
Additional objects, advantages and novel features of the invention will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following, or may be learned by practice of the invention.
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Lau Kai Hung
Sanjurjo Angel
Bozicevic Field & Francis LLP
Doroshenk Alexa A.
Johnson Jerry D.
SRI - International
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