Distillation apparatus for readily polymerizable compound
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United States of America Patent
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Jan 6, 2009
Grant Date -
Nov 17, 2005
app pub date -
Jul 26, 2005
filing date -
Aug 22, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A distillation apparatus for subjecting a crude readily polymerizable compound to distillation under vacuum conditions to purify it, the distillation apparatus having a distillation column and a vacuum generator and an exhaust gas conduit of the vacuum generator connected to a connecting conduit therebetween through a pressure control valve. A method provides purifying of a readily polymerizable compound by subjecting a crude readily polymerizable compound to distillation under vacuum conditions to purify it, the method including using a distillation apparatus having a distillation column and a vacuum generator and an exhaust gas conduit of the vacuum generator connected to a connecting conduit therebetween through a pressure control valve and controlling the action of the pressure control valve based on a pressure of the distillation column.
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