The two processes of producing glyoxal by catalytic oxidation of ethandiol in gas phase, and oxidizing acetaldehyde with nitric acid were introduced and compared.

• 介绍了乙二醛的两种生产工艺,即乙二醇气相催化氧化法与乙醛硝酸氧化法,并对两种工艺进行了比较与评价。