Method for extraction of diosgenin via steam explosion

Abstract

The invention relates to a production process for extraction of diosgenin via steam explosion. The high-purity diosgenin is prepared via preparation of pulp with a dioscoreaceae plant turmeric, preparation of a solid substance via flocculation and sedimentation, hydrolysis by adopting the steam explosion technology, extraction of hydrolysis products with organic solvents and then recrystallization. The process needs no large amount of acid, the wastewater discharge can be reduced, the environmental protection can be facilitated, the energy consumption and production cost can be reduced, and the process is suitable for industrial production.

Description

Technical field: [0001] The invention relates to a method for extracting and separating diosgenin from yellow ginger, a plant of Dioscoreaceae, in particular to a production process for extracting diosgenin by a steam explosion method that does not use a large amount of acid, reduces waste water discharge, and is beneficial to environmental protection. Background technique: [0002] Diosgenin, also known as diosgenin, is the basic raw material for the production of steroid hormone drugs. [0003] The traditional process of extracting diosgenin from yam, a plant of the Dioscoreaceae family, is direct acid hydrolysis. The method is: coarsely crush the turmeric, then directly hydrolyze it with hydrochloric acid, filter, neutralize the acid solution, wash with water until neutral, dry, extract with an organic solvent, concentrate and crystallize . [0004] Someone has improved the acid hydrolysis method, which is called natural hair enzyme method: pre-fermentation before acid h...

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Problems solved by technology

[0007] Although the above new technologies and processes have improved the traditional production processes, they cannot completely change the pollution problems caused by saponin production. On the other hand, due to limited conditions, these new technologies are often still limited to small-scale applications. Difficult to adapt to the needs of industrial mass production

For example, enzymatic fermentation takes a long time, costs high, and often has the problem of low saponin yield; high-pressure cracking requires high energy consumption, high cost, huge time and energy consumption, high equipment requirements, and huge production costs. At the same time, from saponin to Saponin has problems such as incomplete cracking; supercritical CO2 fluid extraction equipment requires high requirements, large investment, and difficulty in large-scale mass production.

[0008] Recently, it has been reported that diosgenin is produced by pyrolysis technology (patent number 200610017787.8). After the raw material is pulverized, the gas at high temperature is used to generate high pressure to promote the cracking of the raw material, and the saponin is decomposed, and then subjected to supercritical fluid extraction or solvent extraction. To obtain saponin, this method not only consumes a lot of energy, takes a long time, requires high equipment, and has high cost, but also has the problems of incomplete cracking and low yield.

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