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AssigneeExxon Research & Engineering Co.
InventorsRonald C. Kowalski, William M. Davis, Neil F. Newman, Z. Andrew Foroulis, Francis P. Baldwin
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In a process for the continuous halogenation of polymers by contacting polymer and halogenating agent in a continuous flow device in which the polymer and halogenating agent are subjected to deformation during reaction and in which means are provided for disengaging reaction by-products and unreacted halogenating agent from the reaction mixture, a significant process improvement is realized by injecting an inert gas into the halogenated polymers immediately after reaction in order to neutralize the product. In a preferred embodiment the process is carried out in an extruder-reactor and an optional, supplementary inert gas scrubbing zone is included. The process is amenable to saturated and unsaturated polymers.
A process for the continuous production of halogenated polymer the process comprising contacting a cohesive polymer mass and halogenating agent in a continuous flow device comprising means for conveying said polymer through said device wherein said polymer and said halogenating agent are subjected to deformation and means for disengaging by-product of the halogenation reaction and unreacted halogenating agent from said halogenated polymer comprising injecting inert gas into said continuous flow device downstream of said contact between said polymer and said halogenating agent in order to neutralize said halogenated polymer.
A process for the continuous production of halogenated polymer by reacting said polymer and a halogenating agent in an extruder-reactor, said extruder-reactor comprising feed zone (A), reaction zone (B) and neutralization zone (C) in sequence;
Dependencies are inferred from the claim text.