Apparatus and method for batch drying using a microwave vacuum s

Drying and gas or vapor contact with solids – Apparatus – For diverse operations on treated material

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34 77, 34133, 34 45, B01K 500

Patent

active

048828513

ABSTRACT:
A mechanism for batch drying of a powdered or particular product with a microwave vacuum system is disclosed along with a method of controlling the drying process. The mechanism includes a chamber for drying the product. The product is contained in an internal product container. The product container and chamber are coordinated to allow easy opening on a rail system. The mechanism includes a means for inducing a vacuum in the chamber that can also with draw solvent vapor from the chamber. A source of microwaves for the chamber is provided, and the product container has an agitation mechanism for the product. A means for controlling the drying operation is also disclosed. The preferred embodiment of the mechanism include a solvent recovery system. The method of controlling the drying process allows for the selective halting of the drying operation upon achieving selectable parameters. The control systems also allows selectable parameters to be maintained during the drying operation.

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patent: 4622446 (1986-11-01), Sugisawa et al.
Doyle, et al., Microwave Drying for Highly Active Pharmaceutical Granules published in "Manufacturing Chemist" Feb. 1987.
T. K. Fielder, Microwave Vacuum Dryer brochure, dated May 1988.
Cliff, Applications of Microwaves in the Pharmaceutical Industry, published at the Institution of Chemical Engineers Northwester Branch Papers 1986.
Waldron, Microwave Vacuum Drying of Pharmaceuticals: The Development of a Process, undated.
Raymond Automation, Microwave Vacuum Dryer Offers Fast, Clean Drying, advertisement, undated.
T. K. Fielder, Spectrum Process, undated.
T. K. Fielder, Spectrum Processor Granulator Vacuum Dryer with Microwave Heating, undated.
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