The synthesis of p phthalaldehyde from p xylene by chlorination and catalytic oxidation was studied. The total yield was over 89%, the purity of the product was over 99%.

• 以对二甲苯为原料，经氯化、催化氧化合成对苯二甲醛，收率大于89%25，质量分数在99%25以上。该工艺提高了产品的收率和纯度