Study on Reaction Mechanism and Process for Ozonation of Natural Cottonseed Oil
1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2. Engineering Research Center of Process System Engineering, East China University of Science and Technology, Shanghai 200237, China
Abstract：To study the reaction process for ozonation of natural cottonseed oil in different solvents and obtain products with high peroxide value, a series of ozonized oil was prepared through ozonolysis using cottonseed oil as raw material. The process of ozonation reaction and structure of resulting products were confirmed by infrared spectrum (IR), nuclear magnetic hydrogen spectroscopy (1H-NMR), heteronuclear multiple bond correlation (HMBC) and heteronuclear multiple quantum correlation (HMQC), and optimized conditions of reaction in ethyl acetate was obtained. The results showed that the carbonyl oxide could be captured by aldehyde and the main product was ozonide in ethyl acetate solvent, while the carbonyl oxide could be reacted with hydroxyl group to form difunctional product of peroxyhydroxy and methoxy group in methanol solvent. The effects of solvent dosage and ozone flow rate on the ozonation process were investigated and ozonized cottonseed oil with the peroxide value of 1 990.73 mmol/kg and good thermal stability was obtained under the conditions of 25 g cottonseed oil, 50 g ethyl acetate as solvent, ozone concentration 80 mg/L, the flow rate 3 L/min and the reaction time 2 h.
CHEN Fang1,LI Jia1,XI Zhenhao1 et al. Study on Reaction Mechanism and Process for Ozonation of Natural Cottonseed Oil [J]. 化学反应工程与工艺, 2019, 35(1): 64-72.
