Environment-protecting pollution-free production method of dioscorea saponin

Abstract

The invention provides an environment-friendly and non-polluting method for producing diosgenin, in which raw material pretreatment, sieving, membrane filtration dehydration, fermentation, hydrolysis, filtration, secondary hydrolysis, and water washing are sequentially carried out before the conventional extraction, concentration, and crystallization steps Steps or sequentially implement the steps of raw material pretreatment, sieving, membrane filtration and dehydration, adding solvent for extraction and separation twice, combining the extracts, and then carrying out the steps of distillation, fermentation and hydrolysis. The method is simple and easy to operate, does not need complex special equipment, and has relatively broad requirements on the implementation environment and temperature, so it is more suitable for large-scale production, that is, the basic raw material yam for the production of steroid hormone drugs is purified from a large number of yam plants Saponin. The invention can utilize resources more effectively, reduce the discharge of pollutants, and reduce the discharge of waste water to the greatest extent without increasing costs and investing in environmental protection facilities, and effectively solves the problem of environmental pollution in the diosgenin industry.

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% of plant fiber, 45-50% of starch, 10% of 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 tha...

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 precipitation of starch is colloidal and has a large volume. Although it can improve the yield and quality of saponin, it cannot reduce the discharge of waste water, so the pollution problem remains unsolved

The new technique of producing diosgenin by the separation method has its limitation again, and it is more applicable to dry yam raw material, and fresh, especially in the diosgenus that excavates in growth period part saponin dissolves in wherein water, is not suitable for this kind process, the vast majority of raw materials in the market are fresh yams, and drying them will greatly increase production costs

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