04055001 is referenced by 29 patents and cites 2 patents.

Volatile polar vehicles such as water or organic solvents, are removed from nonpolar materials by passing said material through at least one pneumatic conveyor resonating cavity operating at a microwave frequency of about 600 to about 50,000 MHZ. For example, a polymer such as polyvinyl chloride may be dried by conveying the polymer through said pneumatic conveyor operating at a frequency of 915 MHZ for a time sufficient to reduce the volatiles content to about 5 wt. % and subsequently conveying the partially dried material through a second pneumatic conveyor resonating cavity operating at a microwave frequency of 2450 MHZ for a time sufficient to reduce the polar vehicle content to below 0.5 wt. %.

The resonating cavities may constitute a single pneumatic conveyor having zones operating at different frequencies, said zones being isolated from one another by microwave suppressors such as "eggcrate" type suppressors. Alternately, several pneumatic conveyor systems, each operating at a different frequency, may be used.

Title
Microwave drying process for synthetic polymers
Application Number
9247
Publication Number
4055001
Application Date
September 25, 1975
Publication Date
October 25, 1977
Inventor
Peter J Creighton
Mendham
NJ, US
Eric O Forster
Scotch Plains
NJ, US
Agent
John J Mahon
A Lagani
Assignee
Exxon Research & Engineering Co
NJ, US
IPC
F26B 7/00
F26B 3/34
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