Method for suppression of polymerization in vacuum zone of easy-to-polymerize compounds purifying system


Application Number: 00109005
Application Date: 2000.06.01
Publication Number: 1276363
Publication Date: 2000.12.13
Priority Information: 1999/6/3 JP 156656/1999
International: C07B63/00;B01D3/00
Applicant(s) Name: Nippon Shokubai Co., Ltd.
Address:
Inventor(s) Name: Matsumoto Yukihiro;Nishimura Takeshi
Patent Agency Code: 11021
Patent Agent: li yue
Abstract A process for inhibiting a polymerization of an easily polymerizable compound in an easily polymerizable compound purification system is disclosed. According to the present invention, the polymerization of the easily polymerizable compound such as (meth)acrylic acid and (meth)acrylate flowed into a vacuum section can be inhibited by contacting a liquid containing a polymerization inhibitor with the compound directly in the vacuum section. When the vacuum section includes a gas and liquid contact chamber, the liquid containing a polymerization inhibitor may be supplied to the chamber. When the vacuum section includes a liquid ejector and/or a nash pump as a vacuuming device, the liquid containing a polymerization inhibitor may be circulated by the liquid ejector and/or the nash pump for reducing a pressure of a purifying section. The system of the invention is suitable for purifying the easily polymerizable compound.