Through the hydrolysis of sulfuric acid, change the cellulose of the wood chip into dextrose, with the help of accelerant oxidize it by using nitric acid can yield the oxalic acid.

• 通过硫酸水解；将木屑中的纤维素转化为葡萄糖；在催化剂作用下；用硝酸将其氧化；制取了草酸.