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Waste-water-free production method for diosgenin

A technology of diosgenin and its production method, which is applied in the field of extraction and separation of diosgenin, to achieve the effects of utilizing resources, meeting environmental protection requirements, and saving costs

Inactive Publication Date: 2008-11-12
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is: in order to overcome the problem that acid hydrolysis is needed in the production process of diosgenin and produce a large amount of waste water, provide a kind of non-waste water production method that can extract diosgenin without acid hydrolysis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: A wastewater-free production method of diosgenin, the specific steps of which are: remove 10 kg of fresh raw materials from sediment and coarsely crush them to form lumps with a size of 1 cm to 5 cm; place the coarsely crushed raw materials under high pressure Decompose under pressure in a thermal decomposition device, using CO 2 In order to provide the pressure medium, the temperature in the control device is 120°C, the pressure is 20MPa, keep the pressure for 6h, and then discharge the material; the material after thermal decomposition is cooled and dried, which can be used to extract diosgenin; petroleum ether is used as Extract diosgenin with organic solvent; the consumption (volume) of petroleum ether is 10 times of material quality (take 10g raw material as example, add 100mL petroleum ether and carry out reflux extraction), extraction temperature is 85 ℃, reflux 4h, filter while hot, Collect the filtrate; add 0.2g of activated carbon to the filtrate, r...

Embodiment 2

[0026] Embodiment 2: A kind of waste water-free production method of diosgenin, its specific steps are: remove 10kg of dry raw material silt, carry out coarse crushing, form the lump of 1cm~5cm size; The raw material after coarse crushing is in clear water Soak for 2 hours, then put it in a high-pressure thermal decomposition device for pressure decomposition, using CO 2 To provide the pressure medium, the temperature in the control device is 150°C, the pressure is 30MPa, keep the pressure for 4h, and then discharge. The thermally decomposed material is cooled and dried, and can be used to extract diosgenin.

[0027] with supercritical CO 2 Extract diosgenin, and use ethanol as entrainer to extract; take 200g of the raw material after thermal decomposition in the extraction kettle, the extraction pressure is 35MPa, the extraction temperature is 45°C, the extraction time is 2h, CO 2 The flow rate is 10kg / h, the pressure of separation tank 1 and 2 is 5.0MPa, and the extracted ...

Embodiment 3

[0029] Embodiment 3: A waste-water-free production method of diosgenin, the specific steps of which are as follows: removing silt from 5 kg of fresh raw materials, and performing coarse crushing to form lumps with a size of 1 cm to 2 cm. Put the coarsely crushed raw materials in a thermal decomposition device for pressure decomposition, using CO 2 To provide pressure medium, the temperature inside the control device is normal temperature, the pressure is 30MPa, keep the pressure for 3h, and then discharge. The thermally decomposed material is dried and used as a raw material for extracting diosgenin.

[0030] Methanol was used as an organic solvent to extract diosgenin. The amount (volume) of methanol is 10 times the mass of the material, that is, take 10g of raw material, add 100ml of methanol for reflux extraction, the extraction temperature is 85°C, reflux for 6h, filter while it is hot, and collect the filtrate; add 0.2g of activated carbon to the filtrate, reflux 0.5h, ...

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Abstract

The invention relates to a non waste water producing method for yam saponin that includes the following steps: putting smashed raw materials into thermal decomposition device to take pressuring decomposing, controlling the temperature in 0-200degree centigrade and the pressure in 0.8-40MPa, and keeping for 5min-9h, drying the material and distilling in normal method. In the whole producing process, acid and alkali are not needed any more. It has no waste water, and has simple producing process, low cost, etc.

Description

Technical field: [0001] The invention relates to a method for extracting diosgenin, in particular to a waste-free production method for extracting diosgenin (also called diosgenin) from the massive roots of yam plants such as yellow ginger, pangolin, and yellow yam. Dioscin extraction and separation field. Background technique: [0002] The traditional production process of extracting diosgenin (also known as diosgenin) from yam plants such as turmeric, pangolin, and yellow yam includes: hydrolyzing and cutting off glycosidic bonds, crudely extracting aglycone, and recrystallization. The hydrolysis process is A critical step in determining yield. The hydrolysis process mainly includes chemical hydrolysis (direct acid hydrolysis, pre-fermentation-acid hydrolysis) and biological hydrolysis (enzymolysis or microbial fermentation). After hydrolysis, operations such as filtration, extraction, and recrystallization are used to obtain diosgenin. Dioscorea contains not only a smal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07J71/00C07J75/00
Inventor 刘国际陈俊英
Owner ZHENGZHOU UNIV
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