This reaction involves disproportionation of the aldehyde .

这个反应就是醛的歧化作用。

The development conditions of toluene disproportionation and transalkylation to prepare p-xylene , light paraffin aromatization were introduced emphatically .

着重介绍了甲苯歧化和烷基转移制取对二甲苯，还有轻质烷烃芳构化的进展情况。