Method for extracting Chinese yam saponin from turmeric

A technology of diosgenin and turmeric, applied in chemical instruments and methods, preparation of steroids, steroids, etc., can solve problems such as limiting effective extraction and application of diosgenin, hidden dangers of food safety and production safety, and immature technology. , to achieve the effect of easy operation, avoiding the danger of flammable and explosive, and shortening the production cycle

Inactive Publication Date: 2006-07-26
PEKING UNIV +1
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  • Abstract
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Problems solved by technology

[0004] The above several types of processes all use organic solvents such as petroleum ether or gasoline to extract diosgenin, all of which have the following shortcomings, which largely limit the effective extraction and application of diosgenin
(1) The extraction is carried out under normal pressure, so the efficiency is low; in order to maximize the extraction efficiency, it is necessary to adopt a circular extraction method, which makes the process operation cumbersome and greatly prolongs the production cycle
(2) A larg

Method used

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  • Method for extracting Chinese yam saponin from turmeric
  • Method for extracting Chinese yam saponin from turmeric
  • Method for extracting Chinese yam saponin from turmeric

Examples

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Embodiment 1

[0028]Take by weighing turmeric acid hydrolyzed dried product (self-made, be about to turmeric raw material is separated cellulose through the grinding with water, remove starch by enzymatic method, and obtain after drying after fermentation acid hydrolysis; wherein saponin content is 13.9%.) 2kg, Put into the extraction kettle, add entraining agent (80% ethanol by volume fraction), start to heat the extraction kettle and the separation kettle after sealing, open the carbon dioxide steel cylinder at the same time to let the carbon dioxide enter the storage tank, when the temperature of the extraction kettle and the separation kettle reaches 50°C, At 55°C, open the valve entering the extraction kettle to allow carbon dioxide gas to enter the extraction kettle through the mixer and purifier; open the high-pressure pump to pressurize the extraction kettle. When the extraction pressure reaches 15Mpa, close the valve entering the extraction kettle for static extraction. Then open t...

Embodiment 2

[0030] The same raw materials and operation as in Example 1, the entraining agent all adopts ethanol with a volume fraction of 90%, and 2 kg of turmeric acid hydrolyzed dry matter is fed. The conditions for extracting pigments and other substances are the same as before; when extracting diosgenin, the temperature of the extraction kettle and the separation kettle are 63°C and 45°C respectively, and the pressure of the extraction kettle is 25MPa. After 3 hours of extraction, the main Contains diosgenin extract. The extract was centrifuged or filtered to obtain 302g of diosgenin product with a purity of 96.5%, mp210.81°C, and a product yield of 15.1%, which met the standard for saponin products.

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Abstract

A method which extract yam saponin, using supercritical fluid extraction method and carbon dioxide as extraction solvent; firstly, separating pigment of turmeric acid hydrolytic dry matter via 0. 5-2h static extraction of carbon dioxide and 2-6h circulating extraction in the condition of 15-40Mpa extraction pressure, 30-50deg C extraction temperature, 4-8MPa analytical pressure and 35-55deg C analytical temperature; then in the condition of 15-40MPa extraction pressure, 30-70deg C extraction temperature, 4-8MPa analytical pressure and 35-55deg C analytical temperature, getting yam saponin product via 0. 5-2h static extraction of carbon dioxide and 2-6h circulating extraction, centrifuging or filtration; Finally, recovering ethanol; at the same time of extraction, adding ethanol entrainer in circulatory system. The advantages of this invention are the production circle is short, the operation is simple, the separation is easy, no pollution, avoiding inflammability and flammability of organic solvent, the productivity and the purity of product is high.

Description

technical field [0001] The invention belongs to a method for extracting substances from natural plants, in particular to a method for extracting cyclopentane from turmeric (D.zingiberensis, also known as Dioscorea scutellaria) and (a) a steroid fused with a hydrogenated phenanthrene skeleton and a heterocyclic ring family compound-diosgenin method. Background technique [0002] Diosgenin (Diosgenin) is also known as diosgenin, and its chemical name is Δ, 3-hydroxyl, 25R-spirosterene. Its structural formula is shown in figure 1 . It was first isolated from Dioscorea tokoro Makino by Japanese scholars in the 1930s. Existing studies have reported that this compound has hemolytic, blood lipid-lowering, antibacterial, anti-inflammatory, anti-tumor effects, etc. It is an important pharmaceutical and chemical raw material for the synthesis of steroid hormone drugs and steroidal contraceptives, and can be further processed. There are more than 300 varieties of hormones, sex hormo...

Claims

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Application Information

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IPC IPC(8): C07J71/00C07J75/00
CPCY02P20/54
Inventor 黄文欧阳琦张歆倪晋仁
Owner PEKING UNIV
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