APPARATUS AND METHOD FOR PURIFYING EASILY POLYMERIZABLE SUBSTANCE

摘要

An apparatus (10) and a method for purifying an easily polymerizable substance equipped with a rectifying column (11) for purifying the easily polymerizable substance by continuous distillation thereof, wherein an introduction port for a first polymerization inhibitor (27) is provided in an intermediate portion (26) of the rectifying column (11), preferably at a position such that a theoretical plate number (H2) from the introduction port (27) for the polymerization inhibitor to the top (15) of the column satisfies the formula: 0.1 x H1 <= H2 < (H1) wherein (H1) represents the theoretical plate number from an introduction port(25) for the easily polymerizable substance to the top (15) of the column. The apparatus and the method allow the prevention of both the polymerization within the rectifying column and the incorporation of the polymerization inhibitor into a distillate of the rectification, which results in the production of a high quality product.