Blumea balsamifera essential oil extraction process

Through ultrasonic-microwave synergistic pretreatment and supercritical CO2 extraction technology, combined with nitrogen protection and low-temperature molecular distillation, the problem of oxidative deterioration of Ai Na essential oil was solved, high-purity and high-yield essential oil extraction was achieved, and the L-borneol content and antibacterial activity were increased.

CN120758292APending Publication Date: 2025-10-10QIANNAN COLLEGE OF ETHNIC MEDICINE
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Patent Information

Application Number
CN202510791642.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-13
Publication Date
2025-10-10

AI Technical Summary

Technical Problem

The existing Ai Na Xiang essential oil extraction device has problems such as essential oil oxidation degradation, reduced yield and quality deterioration. In particular, terpene compounds undergo polymerization and isomerization under high temperature and long-term heat action, and the open condensation system intensifies the free radical oxidation reaction.

Method used

Ultrasonic-microwave synergistic pretreatment, supercritical CO2 extraction and molecular distillation technology are used, combined with nitrogen protection and low-temperature operation, through time-sequential step-by-step energy input and ethyl lactate entrainer to achieve cell disruption and efficient extraction.

Benefits of technology

The L-borneol content and antibacterial activity of Ai Na essential oil were improved, the yield was increased to 5.1%, the L-borneol content was ≥90%, the antibacterial activity was increased by 30%, and the decomposition of heat-sensitive components was avoided.

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Abstract

The invention discloses a blumea balsamifera essential oil extraction process, and belongs to the technical field of essential oil extraction processes, and the blumea balsamifera essential oil extraction process comprises the following steps: spreading and airing fresh blumea balsamifera leaves, and sequentially carrying out 28kHz ultrasonic treatment for 31 minutes and 450W microwave treatment for 23 minutes under the protection of nitrogen; mixing the pretreated material with 5% ethyl lactate, and carrying out supercritical COextraction under the conditions of 30MPa and 50 DEG C; and carrying out molecular distillation at 50 DEG C to obtain high-purity essential oil. The ultrasonic-microwave physical field synergistic pretreatment and supercritical extraction coupling technology is initiated, the cell breakage rate is increased through sequential step-by-step energy input (ultrasonic-microwave), and the extraction rate of L-borneol is increased compared with that of a traditional distillation method in combination with an ethyl lactate entrainer. The L-borneol content of the obtained essential oil is greater than or equal to 90%, the antibacterial activity is improved by 30%, and the whole process is operated at low temperature (less than 60 DEG C) to avoid the decomposition of thermosensitive components. The method is suitable for industrial production of the pharmaceutical-grade blumea balsamifera essential oil.
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