In the course of oxidation, reaction temperature should rise step by step, and in the late stage, reduced pressure distillation should follow so that the concertration of glyoxalic acid can rise and production rate of allantoin can rise up to 40%.
英
美
- 在氧化反應的過(guò)程中逐步地提高反應溫度，反應后期進(jìn)行減壓濃縮，提高了乙醛酸的濃度，縮短了氧化時(shí)間，并使尿囊素產(chǎn)率達到40%25。
