Fermenting free hydralysis process for extracting saporin from yellow ginger

Abstract

This invention relates to a method to efficiently extract diosgenin from the root and stem of dioscorea zingiberensis without fermentation, that is, a proper amount of water is added and the root and stem of dioscorea zingiberensis are pulverized. Fiber sediments and starch in the sludge are separated by a mechanical method and the pH value of the sludge is immediately adjusted to below 4.5 with acid. The adjusted and unfermented sludge is concentrated and acid hydrolyzed with the aid of hydrolysis agent. The hydrolyzed mixture is filtered to remove acid, neutralized, dried, extracted with organic solvent and crystallized so as to obtain diosgenin product.as fermentation is purposely inhibited and avoided during acid hydrolysis of the concentrated sludge in this invention, not only the stench problem is solved, but also the hydrolysis effect is greatly promoted. The extracted diosgenin product is of good crystallinity, high purity, white color and its melting point can be above 200 deg. C.

Description

technical field [0001] The content of the invention belongs to the technical field of plant chemical industry, and relates to a production process method for extracting diosgenin (commonly known as diosgenin) from turmeric rhizomes without fermentation. Background technique [0002] Diosgenin, the active ingredient extracted from the rhizomes of turmeric, is an important raw material for the synthesis of steroid hormones, anti-inflammatory drugs and steroid contraceptives. Since diosgenin exists in the cell wall in the form of combining with cellulose to form saponins in the rhizome of turmeric, it must be isolated by appropriate methods. In the past, the methods for extracting diosgenin on a production scale mainly include traditional conventional acid hydrolysis process, natural fermentation-acid hydrolysis process, and enzyme fermentation-acid hydrolysis process. The conventional acid hydrolysis process has been rarely used due to its low extraction rate of diosgenin. T...

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Problems solved by technology

[0004] However, the new process has not fundamentally solved the problem of odor pollution produced by fermentation, and because the concentrated slurry is subjected to enzyme fermentation and acid hydrolysis, it has also brought two new problems: one of the problems is that the concentrated slurry The concentration of water-soluble organic impurities in the material also increases accordingly. Some organic substances are decomposed and transformed into lipophilic and even colored impurities by enzymes or microorganisms during the enzyme fermentation process, which can be absorbed by organic solvents together with diosgenin. It was pointed out that the purity of the finished diosgenin product was reduced, and the color became poor; another problem was that the diosgenin connected to the cellulose fragments in the concentrated slurry was not only high in concentration but also highly exposed. , the dissociated diosgenin is easy to interact with acid groups, making it more hydrophilic, making it difficult for diosgenin to be completely extracted by organic solvents, reducing the yield of diosgenin