Method for supercritical fluid extraction of taxus chinensis seed volatile oil

A southern yew, supercritical technology, applied in essential oils/fragrances, fat production, etc.

Inactive Publication Date: 2015-03-04
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the branches and leaves of Taxus chinensis are the main raw materials for extracting the volatile oil of Taxus chinensis, and traditional methods such as steam distillation and solvent reflux are mainly used, and the yield is low. (less than 2%), poor quality (deep color, miscellaneous odor), cumbersome subsequent separation, etc.

Method used

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  • Method for supercritical fluid extraction of taxus chinensis seed volatile oil
  • Method for supercritical fluid extraction of taxus chinensis seed volatile oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Grinding: Grinding the seeds of Taxus chinensis to a particle size of 20 mesh and sieving.

[0028] (2) Freeze-drying: freeze-dry the pulverized material at -50°C for 4 hours.

[0029] (3) Supercritical extraction: put the freeze-dried raw materials into the extraction kettle for extraction, and the filling factor is 80%. The extraction conditions are: extraction pressure 25MPa, extraction temperature 50°C, extraction time 4h, temperature of one separation tank 30°C, pressure 8MPa, temperature of the other separation tank 30°C, pressure 8MPa.

[0030] (4) Separation: After the extraction is completed, the obtained liquid is released from the two separation kettles, which is the volatile oil of Taxus chinensis seeds. After weighing, the yield of volatile oil is 27.4%.

Embodiment 2

[0032] (1) Grinding: Grinding the seeds of Taxus chinensis to a particle size of 40 mesh and sieving.

[0033] (2) Freeze-drying: freeze-dry the pulverized material at -45°C for 5 hours.

[0034] (3) Supercritical extraction: put the freeze-dried raw materials into an extraction kettle for extraction, and the filling factor is 90%. The extraction conditions are: extraction pressure 20MPa, extraction temperature 45°C, extraction time 3h, temperature of one separation tank 35°C, pressure 6MPa, temperature of the other separation tank 35°C, pressure 6MPa.

[0035] (4) Separation: After the extraction is completed, the obtained liquid is released from the two separation kettles, which is the volatile oil of Taxus chinensis seeds. The yield of volatile oil is 25.8% after weighing.

Embodiment 3

[0037] (1) Grinding: Grinding the seeds of Taxus chinensis to a particle size of 30 mesh and sieving.

[0038] (2) Freeze-drying: freeze-dry the pulverized material at -40°C for 6 hours.

[0039] (3) Supercritical extraction: put the freeze-dried raw materials into an extraction kettle for extraction, and the filling factor is 90%. The extraction conditions are: extraction pressure 15MPa, extraction temperature 40°C, extraction time 2h, temperature of one separation tank 40°C, pressure 10MPa, temperature of the other separation tank 40°C, pressure 10MPa.

[0040] (4) Separation: After the extraction is completed, the obtained liquid is released from the two separation kettles, which is the volatile oil of Taxus chinensis seeds. The yield of volatile oil is 23.8% after weighing calculation.

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Abstract

The invention discloses a method for supercritical fluid extraction on taxus chinensis seed volatile oil. The method mainly comprises the following steps: crushing, freeze-drying, performing supercritical fluid extraction, separating, and the like. The method comprises the following specific steps: (1) crushing the taxus chinensis seeds, and screening after crushing; (2) performing freeze-drying on the crushed material; (3) filling an extraction kettle with dried raw material for extraction according to a certain filling coefficient; and (4) after the extraction, respectively discharging the volatile oil from two separation kettles. The taxus chinensis seed volatile oil extracted by using the method has the advantages that the volatile oil is high in yield, good in quality, free of solvent residue, simple in operation process, easy in industrialization and the like, and the time can be saved.

Description

technical field [0001] The invention relates to a method for extracting volatile oil from southern yew seeds by adopting supercritical technology, and belongs to the field of food processing. Background technique [0002] The genus Taxus has a wide geographical distribution, mainly in the cold temperate, temperate and subtropical regions of the northern hemisphere. There are currently 11 major species found in the world. There are 4 species and 1 variety in our country, namely Northeast yew, Yunnan yew, Southern yew (Taxus beautiful), Chinese yew (Taxus chinense), and Tibetan yew (Yew Himalayan). Southern yew is a unique plant in my country. It is the most widely distributed and has the largest reserves among the five naturally growing yews in my country. It is mainly distributed in the Yangtze River Basin, Nanling Mountains, Henan, Shaanxi (Qinling), Gansu and other provinces. Mountains or valleys, Jiangxi Province is also one of its important natural distribution a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
CPCC11B9/02C11B9/025
Inventor 熊伟李雄辉史新安饶玉喜付建平王慧宾胡居吾
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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