Method for preparing aromatic aldehyde compound by catalyzing and degrading lignin with loaded solid acid

The invention discloses a method for preparing aromatic aldehyde compound by catalyzing and degrading lignin with loaded solid acid. The preparation method is simple, convenient, efficient, and is short in reaction time, and overcomes the shortcomings of the prior art that the technology is complex, and the yield of product is low; and meanwhile, the catalyst has good catalyzing effect in preparing the aromatic aldehyde compound by catalyzing and degrading lignin. The method for preparing romatic aldehyde compound by catalyzing and degrading lignin with loaded solid acid comprises the steps as follows: 1) preparing the catalyst: preparing the loaded solid acid catalyst through a dipping method, wherein the catalyst comprises carrier and Lewis acid salt which is loaded on the carrier, and the carrier is molecular sieve; and the loading capacity of Lewis acid is 2-35wt%; 2) preparing materials: crushing lignin to 10-20 meshes, and then drying; and 3) catalyzing through microwave and oxidative degradation to obt