| abstract |
PROBLEM TO BE SOLVED: To provide an apparatus for handling an easily polymerizable compound such as (meth) acrylic acid, which comprises a tubular member provided on an apparatus side wall and opened inside the apparatus, specifically, For example, in a (meth) acrylic acid distillation column having a gas or liquid inlet or outlet, manhole, instrumentation device insertion tube, etc., polymerization of (meth) acrylic acid in the distillation column is effectively prevented. Apparatus and methods are provided. SOLUTION: A tubular member (an inlet or an outlet, a manhole, an instrumentation instrument insertion pipe, etc.) is provided with a downward inclination (α) of 3 ° to 70 ° toward the inside of the apparatus. |