Process and apparatus for extraction and recovery of blowing...

Details Process and apparatus for extraction and recovery of blowing... Process and apparatus for extraction and recovery of blowing...

B - Operations, Transporting

29

B

B29B 17/02 (2006.01) B09B 3/00 (2006.01) B29C 44/56 (2006.01) C08J 9/36 (2006.01)

Patent

CA 2062684

ABSTRACT OF THE INVENTION TITLE PROCESS AND APPARATUS FOR EXTRACTION AND RECOVERY OF BLOWING AGENTS FROM POLYMERIC FOAMS An apparatus and process for removing blowing agent from polymeric foam. The apparatus comprises a comminution zone into which extraction liquid and polymeric foam may be introduced. The upper end of the zone is of larger cross-sectional area and tapers to a lower end of a smaller cross-sectional area. Comminuting means are located within the comminution zone, and are adapted to comminute the polymeric foam and impart a vortex to the liquid and foam. A quiescent zone is directly connected to the lower end of the comminution zone so that comminuted polymeric foam and extraction liquid may be passed directly from the comminution zone to the quiescent zone. Attenuating means for attenuating the vortex created in the comminution zone are located within the quiescent zone. The foam then rises to the top of the quiescent zone and is removed.

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