Method for starting up distilling column
AssigneeNippon Shokubai Co., Ltd.
InventorsKei Hamamoto, Yukihiro Matsumoto, Sei Nakahara, Misao Inada
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Abstract
A method for starting up a distilling column destined to handle an easily polymerizing compound-containing solution characterized by supplying at the start of the operation of the distilling column a polymerization inhibitor to the bottom liquid of the distilling column having a temperature of not higher than 80° C. Further, by supplying a reflux liquid through the top of the distilling column or the middle stage of the column prior to the start of the temperature elevation of the distilling column, thereby preventing the polymerization of the easily polymerizing compound more effectively.
Claims6
A method for starting up a distilling column to handle an easily polymerizing compound-containing solution, wherein a polymerization inhibitor is supplied to a bottom liquid of the distilling column having a temperature of not higher than 80° C. at the start of an operation of the distilling column, wherein an inert gas and/or a molecular oxygen-containing gas is supplied to the interior of the column prior to the start of a temperature elevation of the distilling column till the molecular oxygen-containing gas concentration in the column reaches a level in the range of 0.1-9 vol. % and then, during the course of the temperature elevation, the molecular oxygen-containing gas is supplied till an easily polymerizing compound gas composition in the column exceeds the concentration in upper explosion limits.
Dependencies are inferred from the claim text.