| 摘要 |
Energy cost is reduced and reuse efficiency of epihalohydrin and industrial productivity in the process for preparing an epoxy resin, which uses a recovered epihalohydrin having a low glycidol content, are remarkably improved. In the process for preparing an epoxy resin by reacting a polyhydric phenol compound with epihalohydrin in a water-soluble organic solvent in the presence of an alkali reactive catalyst, first, a first recovered fraction containing a small amount of the by-product glycidol is recovered while continuously distilling a distilled component from the crude reaction product after the completion of the reaction, and then a second recovered fraction containing a small amount of the water-soluble organic solvent is recovered and, furthermore, the second recovered fraction is washed with water to obtain a purified fraction and the purified fraction is used as a raw material for synthesis of the epoxy resin, together with the first recovered fraction. |
