Abstract
In order to provide guidance for the improvement of supercritical fluid extraction technology in the extraction of natural volatile oil and terpenoids from plants, SFE was compared with steam distillation, solvent extraction, Soxhlet extraction, pressure method and other traditional extraction processes, and the supercritical CO2 extraction conditions of SFE in the extraction of natural volatile oil and terpenoids were studied, including temperature, pressure, extraction time, extraction time, extraction time, extraction time, extraction time, extraction time and so on. The influence of entrainer or co extractant on the extraction effect was discussed to provide optimization parameters for the extraction process of natural volatile oil and terpenoids. SFE technology has advantages in the extraction of natural plant volatile oil and has broad application prospects in industrial production.
Highlights
In recent years, the green separation and extraction technology for food processing has been favored, which makes a new green food separation technology supercritical fluid extraction become a research hotspot at home and abroad
Natural active ingredients such as essential oils, carotenoids, fatty acids, polyphenols and flavonoids are usually extracted by steam distillation, solvent extraction, Soxhlet extraction, pressure method and hydrodistillation, but there are some limitations, such as too much time-consuming, using too many organic solvents, losing some volatile compounds and degrading heat-resistant compounds, Toxic solvents may remain in the extract, resulting in low yield and low extraction efficiency
2.1 Characteristics of supercritical fluid extraction technology Supercritical fluid extraction technology has the characteristics of fast extraction speed, high efficiency, no pollution, good thermal sensitivity, etc. supercritical CO2 fluid extraction temperature is low, which can avoid the damage of some chemical substances
Summary
The green separation and extraction technology for food processing has been favored, which makes a new green food separation technology supercritical fluid extraction become a research hotspot at home and abroad. Supercritical fluid has dual characteristics (high density and low viscosity) in supercritical state It can be purposefully extracted from some natural substances and used to screen or remove some components in food. Compared with the traditional extraction process, it has the characteristics of high efficiency, environmental protection, energy saving and easy control. Natural active ingredients such as essential oils, carotenoids, fatty acids, polyphenols and flavonoids are usually extracted by steam distillation, solvent extraction, Soxhlet extraction, pressure method and hydrodistillation, but there are some limitations, such as too much time-consuming, using too many organic solvents, losing some volatile compounds and degrading heat-resistant compounds, Toxic solvents may remain in the extract, resulting in low yield and low extraction efficiency. The effects of supercritical fluid extraction (SFE) on the extraction of natural essential oils and terpenoids from plants were discussed, and compared with traditional extraction
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