Environment-protecting pollution-free production method of dioscorea saporin

A diosgenin and pollution-free technology, which is applied in the field of environmentally friendly and pollution-free production of diosgenin, can solve problems such as pollution, organic waste water discharge, and environmental pollution, and achieve the goals of solving environmental pollution problems, reducing waste water discharge, and effectively utilizing resources Effect

Inactive Publication Date: 2004-07-28
SHENZHEN ZHONGKE TIME BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country has produced diosgenin for more than 40 years, accounting for more than 50% of the world's total output, but conventional production methods have a large amount of organic wastewater discharge, which seriously pollutes the environment and increases production costs. Important factors for the development of diosgenin industry
In the existing process, the yam is ground into a slurry, sieved in water, and the fibers are separated. In order to wash the saponins in a large amount of fibers, more than 30 times of water is needed. Although the clear liquid is drained through precipitation, the The pre...

Method used

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  • Environment-protecting pollution-free production method of dioscorea saporin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The method comprises the steps in turn:

[0029] (1) Raw material pretreatment: wash the raw material with clear water, crush it with a hammer crusher, grind it into a slurry with a mill,

[0030] (2) sieving: use 40-200 mesh vibrating sieves to sieve about 40% plant fibers (the screened out is used as organic fertilizer and fuel),

[0031] (3) Membrane filtration dehydration: remove about 70% of water with ultrafiltration membrane (molecule with a molecular weight cut-off of 400 or more) to form a concentrate,

[0032] (4) Fermentation: in the fermenter, under the condition of 25-45°C, ferment naturally for 48 hours,

[0033] (5) Hydrolysis: add hydrochloric acid or sulfuric acid to make the fermentation broth to PH<2, measure the PH value while adding hydrochloric acid or sulfuric acid during operation, generally choose PH=1, PH=1.5 or PH=1.8, pressurize (0.3Mpa) Hydrolyzed for 0.5 hours,

[0034] (6) Filtration: the clear liquid is filtered out for comprehensive u...

Embodiment 2

[0039] The method comprises the steps in turn:

[0040] (1) Raw material pretreatment: wash the raw material with clear water, crush it with a hammer crusher, grind it into a slurry with a mill,

[0041] (2) sieving: use 40-200 mesh vibrating sieves to sieve about 40% plant fibers (the screened out is used as organic fertilizer and fuel),

[0042] (3) Membrane filtration dehydration: remove about 70% of water with ultrafiltration membrane (molecule with a molecular weight cut-off of 400 or more) to form a concentrate,

[0043] (4) Extraction and separation: the concentrated solution can be extracted with 45-90% solvent methanol, ethanol, propanol, pentanol or acetone for 0.5 hour, and then centrifuged,

[0044] (5) Secondary extraction and separation: the solid slag separated by extraction can be extracted once with any of 45-90% solvent methanol, ethanol, propanol, amyl alcohol or acetone.

[0045] (6) Distillation: Combine the two extracts, and after the solvent is recover...

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Abstract

The present invention relates to a method for environment-protecting pollutionless production of diosgenin. Before the steps of extraction, concentration and crystallization of conventional method the steps of raw material pretreatment, sieving, membrane filtering and dewatering, fermentation, hydrolysis, filtration, secondary hydrolysis and water-washing are successively implemented or the steps of raw material pretreatment, sieving, membrane filtering and dewatering, adding solvent to make extraction separation to twice, combining extracts, distilling, fermentation and hydrolysis are successively implemented. It has no need of complex special equipment, and can purify and produce diosgenin as basic raw material of steroid hormone medicine by utilizing diascorea plant.

Description

technical field [0001] The invention relates to a method for producing diosgenin, in particular to an environment-friendly and pollution-free method for producing diosgenin. Background technique [0002] Dioscin is the basic raw material for the synthesis of hundreds of steroid drugs such as cortisone, prednisone, and dexamethasone. Dioscorea saponin is extracted from the wild plant Dioscorea dioscens, for example, Dioscorea shield leaf, which contains 35-40% plant fiber, 45-50% starch, 10% water-soluble matter, and the saponin content only accounts for 1-2.5%. The conventional process is to put the whole plant body into hydrolysis, 0.3N hydrochloric acid solution, and under the condition of 136°C, 85% of the substances are dissolved in acid water. An average of 70 tons of yams are used to produce 1 ton of saponin, and 25 tons of hydrochloric acid are consumed. The acid solution is filtered out, and the material is washed with water to neutrality. At least more than 1,700 t...

Claims

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Application Information

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IPC IPC(8): C07J71/00
Inventor 周航周振起
Owner SHENZHEN ZHONGKE TIME BIO TECH
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