| 摘要 |
The purification by distillation of glycidyl (meth)acrylate containing light products containing epichlorohydrin and light impurities, and heavy impurities comprises: in a first stage, a distillation of the glycidyl (meth)acrylate to be purified is conducted in the presence of a first solvent, e.g., water, capable of forming a low boiling point heteroazeotrope with the light impurities and epichlorohydrin, so as to obtain a head fraction which consists essentially of a solvent-light products heteroazeotrope; and, in a second stage, the glycidyl (meth)acrylate thus freed from the light products is subjected to a distillation in the presence of a second solvent, e.g., water, capable of forming a low boiling point azeotrope with glycidyl (meth)acrylate, so as to obtain a head fraction consisting essentially of the second solvent and the required pure glycidyl (meth)acrylate, thus freed from the heavy impurities, the said solvents being present, during these two distillations, throughout the distillation zone, including the boiler.
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