Method and apparatus for inhibiting the formation of polymerized vinylaromatic compounds during distillative purification of vinylaromatic monomer
AssigneeCosden Technology, Inc.
InventorsDebra L. Kendall, James M. Watson, Danny P. Wright
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Abstract
A method and apparatus for inhibiting polymerization of vinylaromatic compounds during distillative purification wherein downcomers and tray bottoms of the distillation column exposed to high concentrations of liquid monomer condensate and low vapor velocities are coated with a non-wetting fluorocarbon polymer.
Claims15
A method of inhibiting the formation of polymerized vinylaromatic compounds during distillative purification of vinylaromatic monomer from a crude feed comprising vinylaromatic monomer admixed with lower and higher boiling materials, said method comprising distilling said vinylaromatic monomer from said crude feed in a multitray distillation column equipped with vapor liquid contact trays provided with openings for upward passage of vapors therethrough and downcomers for downward passage of liquid from tray to tray wherein the downcomers and tray bottoms are coated with a fluorocarbon polymer.
Apparatus for inhibiting the formation of polymerized vinylaromatic compounds during distillative purification of vinylaromatic monomer from a crude feed comprising vinylaromatic monomer admixed with lower and higher boiling materials, said apparatus comprising a multi-tray distillation column equipped with vapor/liquid contact trays provided with openings for upward passage of vapors therethrough and downcomers for downward passage of liquid from tray to tray wherein the downcomers and tray bottoms are coated with a fluorocarbon polymer.
Dependencies are inferred from the claim text.