| 摘要 |
PURPOSE:To efficiently remove non-reacted epichlorohydrin and by-produced chlorine compounds without lowering the recovery rate of the purified products, by subjecting crude glycidyl (meth)acrylate to a stripping treatment under a specific condition and subsequently distilling the treated product. CONSTITUTION:Crude glycidyl (meth)acrylate containing non-reacted epichlorohydrin and by-produced chlorine compounds is bubbled with mixed gases comprising oxygen gas and an inert gas (preferably nitrogen gas) in the presence of a quaternary ammonium salt (preferably tetraethyl ammonium chloride) to strip the epichlorohydrin and the by-produced chlorine compounds, followed by distilling the treated product to provide the objective purified product. The stripping treatment is preferably carried out under a reduced pressure of 2-50mmHg at a temperature which is lower than the boiling point of the solution containing the crude glycidyl (meth)acrylate, etc., and which is higher than the boiling point of the epichlorohydrin.
|
