Extractive Deterpenation of Essential Oils Using Propyl Glycol-Based Deep Eutectic Solvents
In response to the problems of low solubility and easy oxidation and deterioration caused by terpenes in essential oils,explore the deterpenation of essential oils to improve their quality.Using propylene glycol and levulinic acid to synthesize DES as the extractant,the deterpenation of essential oils was optimized by single factor experiments and Box-Behnken response surface analysis,and the effects of HBD/HBA molar ratio,solvent oil mass ratio,and DES water content were investigated.The results showed that the importance of three factors on the deterpenation of essential oil was as follows:DES water content＞solvent to oil mass ratio＞HBD/HBA molar ratio.When HBD/HBA molar ratio was 2.5,solvent to oil mass ratio was 4,and DES water content was 0.00,the distribution coefficient of linalool was 1.196,and the selectivity value was 29.436.After extractive deterpenation of essential oils,the extract dissolved in glycerol and propylene glycol had a clean and fragrant aroma without impurities.
deep eutectic solventsliquid-liquid extractiondeterpenationresponse surface analysis
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维普
