Process for continuously producing ethylene-vinyl acetate copolymer and reaction system
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United States of America Patent
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Issued Date -
Sep 29, 2005
app pub date -
Aug 19, 2004
filing date -
Jul 1, 2003
priority date (Note) -
Abandoned
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Abstract
A process for continuously preparing ethylene-vinyl acetate (EVAc) copolymer, by subjecting ethylene and vinyl acetate to a solution polymerization by introducing the gaseous phase of the polymerization reaction into an impurity scrubbing column and washing the gas phase with a solvent used in the reaction, then recycling it into the reaction system, thereby impurity generated in the reaction will be removed. A reactive system having a reaction tank for co-polymerizing ethylene with vinyl acetate, an ethylene recovering tower connected with the bottom of the reaction tank, a line connecting with the bottom of the recovering tower for recovering ethylene-vinyl acetate copolymer; and an impurity scrubbing column connecting with the top of the reaction tank for removing impurity generated in the polymerization reaction.
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