Method for extracting pepper leaf essential oil through combination of deep eutectic solvent method and microwave-assisted distillation

A technology of deep eutectic solvent and pepper leaf essence, which is applied in the direction of essential oil/spice, fat production, etc., can solve the problems of few reports on essential oil extraction research, achieve rich active ingredients, simple extraction method, and expand the scope of application Effect

Pending Publication Date: 2020-09-29
三沙南海美源岛生物科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the continuous deepening of the research on the properties of DES, the extraction of natural products, such as polyphenols or flavonoids, has a good advantage in the extraction of biologically active substances, but there are few reports on the extraction of essential oils

Method used

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  • Method for extracting pepper leaf essential oil through combination of deep eutectic solvent method and microwave-assisted distillation
  • Method for extracting pepper leaf essential oil through combination of deep eutectic solvent method and microwave-assisted distillation
  • Method for extracting pepper leaf essential oil through combination of deep eutectic solvent method and microwave-assisted distillation

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Embodiment

[0037] A method for extracting pepper leaf essential oil by microwave-assisted distillation in a deep eutectic solvent method. The hydrogen bond acceptor HBA and the hydrogen bond donor HBD in a certain molar ratio form a deep eutectic solvent DES. Assisted distillation extracts essential oil from pepper leaves; its main steps include:

[0038] ① Clean the fresh pepper leaves, dry them in an electric blast drying oven at 40°C-80°C to a constant weight, crush and sieve them into 30-80 mesh pepper leaf powder, and dry them in a desiccator for later use;

[0039] ②Prepare the deep eutectic solvent DES, hydrogen bond acceptor HBA and hydrogen bond donor HBD in a constant warm water bath at 70°C-90°C, mix, heat and stir for 30-120min until a uniform colorless and transparent liquid is formed. Eutectic solvent DES;

[0040] ③Mix according to the liquid-to-material ratio of deep eutectic solvent DES and pepper leaf powder in the range of 5:1 to 25:1 (mL / g), then add distilled water ...

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Abstract

The invention discloses a method for extracting pepper leaf essential oil through a combination of a deep eutectic solvent method and microwave-assisted distillation. According to the method, a deep eutectic solvent (DES) is formed by a hydrogen bond acceptor (HBA) and a hydrogen bond donor (HBD) according to a certain molar ratio, and essential oil is extracted from pepper leaves through microwave-assisted distillation by using the DES. The method comprises the following main steps: (1) cleaning, drying and crushing fresh pepper leaves; (2) preparing the DES; (3) carrying out microwave-assisted treatment on the DES and pepper leaf powder; and (4) extracting the pepper leaf essential oil. The method has the beneficial effects that optimal extraction process conditions responsive to surfaceoptimization are as follows: a choline chloride-urea deep eutectic solvent is used as the optimal extraction agent, a liquid-to-solid ratio is 16: 1 (mL/g), microwave power is 480 W, and extraction time is 53 minutes. The extraction method is simple, oil yield is high, and effective components in the essential oil are rich; the essential oil components are analyzed by adopting gas chromatography-mass spectrometry; a new thought is provided for essential oil extraction method; and meanwhile, the application range of the DES is also expanded.

Description

technical field [0001] The invention relates to a method for extracting plant essential oil, in particular to a method for extracting pepper leaf essential oil by a deep eutectic solvent method and microwave-assisted distillation. Background technique [0002] Pepper (Piper nigrum L.) is a flowering vine belonging to the Piperaceae family. Its fruity and pungent taste is the most widely used spice. Originally produced in Southeast Asia, my country's main production area is Hainan, which accounts for more than 90% of the country's total pepper production. It is now a characteristic agricultural product in Hainan Province. Pepper has the effects of invigorating the stomach, warming the middle and dispelling cold, and eliminating phlegm. It is also commonly used as a carminative for chronic indigestion in medicine. Because of its good antiseptic and antioxidative effects, essential oils can be used as natural preservatives and antioxidants in food. Local people in Thailand ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
CPCC11B9/025C11B9/027
Inventor 陈长锴蒋志国
Owner 三沙南海美源岛生物科技有限公司
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