To provide a method for producing a dehydration product, wherein esterification or amidation of an alcohol and/or an amine with (meth)acrylic acid in the presence of a dehydration solvent is carried out by (A) preventing a reaction liquid from bumping while removing by-produced water from the reaction system, (B) improving and stabilizing detection accuracy of the interface between the dehydration solvent and the by-produced water, and (C) sufficiently suppressing formation of a gel-like material.
The method for producing the dehydration product is characterized by the followings. In the dehydration process of esterifying and/or amidating an alcohol and/or an amine with (meth)acrylic acid in the presence of the dehydration solvent, a reactor 101 and a water separator 127 are essentially used. The water separator includes: a supplying pipe 129 connected to the reactor; a gas phase part and a liquid phase part therein; and detectors 136, 138 for detecting the interface between the dehydration solvent and the by-produced water and/or the gas-liquid interface. An anti-gelling agent is charged into the detector.
ONDA YOSHIYUKI
KONO HISAMOTO
NAGARE KOICHIRO
YUASA TSUTOMU
| JP2000159881A | 2000-06-13 | |||
| JPS5012015A | 1975-02-07 | |||
| JPH09328346A | 1997-12-22 | |||
| JP4549324B2 | 2010-09-22 |