High-purity cycloaliphatic diepoxy compound and preparation process thereof

A process for preparing a high-purity cycloaliphatic diepoxy compound represented by the following Formula (II), the process comprising the steps of:

• purifying a cycloaliphatic diolefinic compound represented by the following Formula (I) through distillation;
• epoxidizing the purified cycloaliphatic diolefinic compound with an aliphatic percarboxylic acid containing substantially no water;
• carrying out desolvation of the epoxidized compound, and further secondarily purifying the epoxidized compound through distillation:
• wherein X represents a bivalent group selected from the group consisting of an oxygen atom, sulfur atom, —SO—, —SO2—, —CH2—, —C(CH3)2—, —CBr2—, —C(CBr3)2—, and —C(CF3)2—;
• and R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, and R18 may be the same as or different from each other and each represents a hydrogen atom, a halogen atom, a hydrocarbon group which may contain oxygen atom or a halogen atom, or an alkoxy group which may be substituted.