Method for preventing easily polymerizing substance from polymerization and method for production of (meth) acrylic acid or ester thereof
AssigneeNippon Shokubai Co., Ltd.
InventorsTakeshi Nishimura, Kazuhiko Sakamoto, Kenji Sanada, Masakatsu Mori
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Abstract
In a packed column handling an easily polymerizing substance, the packing with which the column is stuffed is subjected to a water-repelling treatment or a wetting treatment to prevent the easily polymerizing substance in the packed column from polymerizing. By preventing the occurrence of a polymer, it is made possible to ensure continuous production of an easily polymerizing substance-containing solution and decrease the content of the easily polymerizing substance in the product and consequently improve the quality of the product.
Claims7
A method for preventing an easily polymerizing substance from exposing the substance to polymerization in a packed column handling the easily polymerizing substance, by subjecting the surface of a packing disposed in the interior of the column to a water repelling treatment or a wetting treatment.
A method for the production of (meth)acrylic acid or an ester thereof, characterized by purifying at least one member selected from the group consisting of acrylic acid, methacrylic acid, and esters thereof in the presence of a polymerization inhibitor in a packed column having disposed therein a packing having at least part of the surface thereof subjected to a wetting treatment or a water-repelling treatment.
Dependencies are inferred from the claim text.