Mitsubishi Rayon Company, Limited

Michiyuki Kouno

Yoshiyuki Taniguchi

Yasuhiro Kabu

Masanori Tokuda

Junichi Morioka

Nobuo Momodomi

Disclosed is a method for producing a hydroxyalkyl (meth)acrylate having high production efficiency and placing little burden on a production system. The method for producing a hydroxyalkyl (meth)acrylate comprises a reaction step of reacting (meth)acrylic acid with an alkylene oxide in a reactor while stirring a liquid containing (meth)acrylic acid and the alkylene oxide with a stirrer to obtain a reaction liquid containing a hydroxyalkyl (meth)acrylate, and thereafter a deaeration step of reducing a pressure in the reactor while stirring the reaction liquid with the stirrer to vaporize and remove an unreacted alkylene oxide in the reaction liquid, a number of stirring revolutions of the stirrer in the deaeration step being reduced to 30 to 85% of a number of stirring revolutions of the stirrer in the reaction step.

Method for producing hydroxyalkyl (meth)acrylate

The present invention aims to provide a transfer method and a transfer facility for an easily polymerizable substance that limits standing retention of the easily polymerizable substance in the feed pump, etc., and the generation and adherence of solid matter such as polymer or precipitate that accompanies such retention, in a facility in which respective feed pumps are disposed at the plurality of passages that branch off at the easily polymerizable substance inflow side and converge at the easily polymerizable substance outflow side. In this easily polymerizable substance transfer method, in the case where one feed pumpoperates and the other feed pumpis stopped, a portion of the easily polymerizable substance is fed to feed pumpand second passagein a direction that is opposite to the direction of flow of the easily polymerizable substance when feed pumpis activated. In this easily polymerizable substance transfer facility, a check valveprovided downstream to feed pumphas a hole in the valve plug that permits passage of the easily polymerizable substance.

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Otake, Japan

Michiyuki Kouno