1. Application of p - Ethyltoluene、m - Ethyltoluene & o - Ethyltoluene were discussed in the paper, the method of separating them from C9 arene was tested.
   分析了重整C9芳烃中邻、对、间3种甲乙苯的应用价值。并通过实验,提出了邻与对、间位的分离方案。

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