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Coproduction method of essential oil and flavone from Eriobotrya japonica flowers

A technology for loquat flowers and loquat pollen, which is applied in the directions of essential oils/spices, pharmaceutical formulations, and fat production, can solve the problems of low added value, single product, low processing level, etc., and achieves alleviating environmental pressure, good quality, and improved The effect of added value

Inactive Publication Date: 2012-12-12
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, loquat flowers are widely used for the development of loquat scented tea, the product is single, the processing level is low, and the added value is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Preparation of loquat pollen: fresh loquat flowers were dried in the shade and crushed to obtain loquat pollen, the degree of crushing of the dry powder was 20 mesh, and the water content was 10.10%;

[0020] 2) Extract essential oil: Weigh 20g of loquat flower dry powder and place it in a grinding-mouthed conical flask, add 200mL of petroleum ether (or n-hexane, diethyl ether, ethyl acetate, etc.), ultrasonically assisted extraction at temperature (15-55)°C for 30-90 minutes, filtered to obtain 162 mL of filtrate, and continued extraction with 200 mL of petroleum ether to the filter residue under the same conditions to obtain 185 mL of filtrate. 187mL.

[0021] 3) Preparation of essential oil: Combine 3 extracts, put them in a rotary evaporator for vacuum concentration (recover petroleum ether), dry with anhydrous sodium sulfate for 18-30 hours, and continue to recover by distillation on a water bath at (40-55) °C after drying Petroleum ether to obtain 23.25 mg of ...

Embodiment 2

[0026] 1) Preparation of loquat pollen: fresh loquat flowers were dried in the shade and crushed to obtain loquat pollen, the degree of crushing of the dry powder was 20 mesh, and the water content was 9.35%;

[0027] 2) Extract essential oil: Weigh 20g of loquat flower dry powder and place it in a grinding-mouthed conical flask, add 200mL of petroleum ether (or n-hexane, diethyl ether, ethyl acetate, etc.), ultrasonically assisted extraction at temperature (15-55)°C for 30-90min, filter to obtain 161mL of filtrate, add 200mL of petroleum ether to the filter residue and continue to extract under the same conditions to obtain 183mL of filtrate, and extract the filtrate for the third time under the same conditions 186mL.

[0028] 3) Preparation of essential oil: Combine 3 extracts, put them in a rotary evaporator for vacuum concentration (recover petroleum ether), dry with anhydrous sodium sulfate for 18-30 hours, and continue to recover by distillation on a water bath at (40-55...

Embodiment 3

[0033] 1) Preparation of loquat pollen: fresh loquat flowers were dried in the shade and crushed to obtain loquat pollen, the degree of crushing of the dry powder was 20 mesh, and the water content was 9.37%;

[0034] 2) Extract essential oil: Weigh 20g of loquat flower dry powder and place it in a grinding-mouthed conical flask, add 200mL of petroleum ether (or n-hexane, diethyl ether, ethyl acetate, etc.), ultrasonically assisted extraction at temperature (15-55)°C for 30-90min, filtered to obtain 162mL of filtrate, 200mL of petroleum ether was added to the filter residue to continue extraction under the same conditions, and 184mL of filtrate was obtained, and the filtrate was extracted for the third time under the same conditions 188mL.

[0035] 3) Preparation of essential oil: Combine 3 extracts, put them in a rotary evaporator for vacuum concentration (recover petroleum ether), dry with anhydrous sodium sulfate for 18-30 hours, and continue to recover by distillation on a...

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Abstract

The invention discloses a coproduction method of essential oil and flavone from Eriobotrya japonica flowers, and relates to a precessing method of natural agricultural products. The method comprises the steps of drying the Eriobotrya japonica flowers in the shade and crushing to obtain the Eriobotrya japonica pollens; extracting the Eriobotrya japonica pollens with a solvent, filtering to obtain an extract, and extracting flavone with filter residues; adding anhydrous sodium sulfate for dehydration and drying to obtain an essential oil product; leaching the filter residues with ethanol aqueous solution after the solvent volatilizes completely to obtain a flavone extract; carrying out adsorption separation on the flavone extract, performing desorption with a desorption agent to obtain a desorption solution; and condensing the desorption solution, performing freeze-drying to obtain a flavone solid product. The method can realize the comprehensive utilization of the Eriobotrya japonica flowers, increase the added value of the Eriobotrya japonica flowers and alleviate the environment stress. The obtained essential oil has the characteristic odor of the Eriobotrya japonica and has a good quality and a yield of over 11.56 per mill. The purity of the obtained flavone product can reach to over 68%.

Description

technical field [0001] The invention relates to a processing method of natural agricultural products, in particular to a method for co-producing essential oil and flavonoids from loquat flowers. Background technique [0002] The growth of loquat flowers is relatively large, and the number of flowers per spike can be 30-40. Generally, the number of flowers in a normal spike is 70-110, and the number of flowers can reach more than 260. However, in order to achieve high-quality and high-yield, about 30 % to 50% of the flower spikes need to be wasted by taking measures to thin flowers and preserve fruits. Loquat flowers are rich in flavonoids, terpenoids, plant volatile oils and other physiologically active ingredients. At present, loquat flowers are widely used in the development of loquat scented tea, the product is single, the processing level is low, and the added value is not high. In recent years, studies have found that natural flavonoids have many physiological activit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02A61K36/73A61K133/00
Inventor 陈发河吴光斌王瑞芳谢田伟
Owner JIMEI UNIV
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