| 摘要 |
PROBLEM TO BE SOLVED: To perform filtration removal to a solid matter of a polymerized object (polymer) or the like of a polymerizable monomer generated in storage of the polymerizable monomer of acrylic acid or the like for a short time efficiently and highly.SOLUTION: In a production method of a polymerizable monomer that includes a process in which a liquid including a polymerizable monomer is stored in a storage tank and a process in which the polymerizable monomer inclusion liquid stored in the storage tank is subjected to filtration, when the polymerizable monomer inclusion liquid in the storage tank is subjected to filtration, two or more kinds of filters having a different sieve opening are used, a first circulation filtration process in which the polymerizable monomer inclusion liquid in the storage tank is subjected to circulation and filtration in a filtration vessel in which a first filter having the largest sieve opening is disposed, and then a second or later circulation filtration process in which in an order in which the sieve opening is large, a second or later filter is sequentially used, the polymerizable monomer inclusion liquid in the storage tank is sequentially subjected to circulation and filtration in a filtration vessel in which the second or later filter is disposed are performed. |
