| 摘要 |
PROBLEM TO BE SOLVED: To provide an economically efficient distillation method for an oxystyrene derivative in high recovery rate of the product while generating little polymers having high viscosity during the distillation process. SOLUTION: An oxystyrene derivative expressed by general formula (I) (R is an alkyl group, a haloalkyl group, a cycloalkyl group, a cycloalkylalkyl group, a substituted or unsubstituted aryl group (especially phenyl group), a substituted or unsubstituted aralkyl group (especially benzyl group), an alkoxyalkyl group, an alkanoyl group (especially acetyl group), an alkoxycarbonyl group, an aralkyloxycarbonyl group or an alkylsilyl group) is distilled in the presence of a polymerization inhibitor. The polymerization inhibitor to be added to the distillation system is benzoquinone or a benzoquinone derivative. Distillation of oxystyrene derivative can be carried out in high distillation recovery of the oxystyrene derivative while generating little polymers having high viscosity during the distillation process.
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