C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 6/28 (2006.01) B01D 57/00 (2006.01) B01J 8/00 (2006.01) B01J 8/18 (2006.01) C08C 3/02 (2006.01) C08F 6/00 (2006.01)
Patent
CA 2186301
An apparatus for removing monomers from a solid olefin polymer containing the monomers which comprises a purge vessel having tapered wherein the vessel has a height-to-bottom-diameter ratio of 0.5:1 to 10:1 and the walls have a tapered angle based on a vertical axis of 0.5 to 15 degrees; a solid discharge element disposed in the lower portion of the purge vessel; a solids receiving hopper; a solids inlet disposed in the receiving hopper; a feeding means disposed in the receiving hopper in communication with an inlet for feeding solids to the purge vessel; a gas-permeable, solids-impermeable constraint means disposed below the feeding means defining the upper limit of an expanded bed of solids and defining a gas collection chamber between the top of the purge vessel and the constraint means; a gas entry means disposed in the purge vessel within or below an expended bed of solids; and gas discharge means disposed in communication with the gas collection chamber for discharging gas from the chamber, and process for removing unpolymerized gaseous monomers from a mixture of a solid, granular olefin polymer and the gaseous monomer using the apparatus.
Sim & Mcburney
Union Carbide Chemicals & Plastics Technology Corporation
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