Before 2003, the pre-fermentation-acid hydrolysis procedure was widely made use of in my country to create diosgenin. Compared to the traditional acid direct hydrolysis process, the yield of diosgenin was boosted, however the amount of acid utilized was generally equivalent to the conventional process. Consequently, Pollution is basically the like typical procedures. In the course of the study, it was discovered that the production process of diosgenin utilized a great deal of acid, and the source of the high COD and also body worths in the wastewater was that while the diosgenin in Dioscorea scutellaria was hydrolyzed into diosgenin, the Starch and cellulose are hydrolyzed into sugars (monosaccharides, disaccharides, trisaccharides as well as polysaccharides). In order to decrease the quantity of acid, Li Xiang et al. evaluated the circulation as well as residential properties of starch, cellulose, lignin, dioscin, etc. The splitting up of saponins decreases the quantity of acid to a certain extent, lowers the COD value, figure value, chroma, etc. of wastewater, as well as recoups starch and also cellulose in Dioscorea scutellaria. In 2003, with the assistance of the nationwide environmental protection task, Shaanxi Provincial Environmental management Bureau utilized this technology for the commercial manufacturing of dioscin, as well as developed a separation-based clean manufacturing version business of diosgenin in Shangluo area– Shanyang Jinchuan Fengxing Chemical Co., Ltd. Accountable company, from the point of view of procedure, the consumption of acid, coal, and also gasoline in this innovation are 10% -15%, 25% -50%, and also 30% -35% of the typical process, respectively, and also the drainage discharge is 90% of the typical procedure, the COD worth and also body value of the wastewater are 10% of those of the traditional procedure, as well as 20% to 25% of the starch in the dioscorea can be recouped. Nonetheless, due to the long procedure course, large devices investment as well as high price, as well as because the recycled starch contains sediment, the application of recycled starch is restricted. In order to decrease the production expense of diosgenin, LinliQiu et al. presented ultrasonic technology into the research of dioscin extraction on the basis of typical ethanol removal innovation, which greatly saved the removal time of dioscin, enhanced the extraction performance of diosgenin, and also raised The return of diosgenin. Nonetheless, because of the huge loss of ethanol during the extraction procedure and bad security, the promotion and application of this technology have been limited. Liu Shuxing et al. made use of surfactants in the research of dioscin removal, as well as discovered that the enhancement of surfactants dramatically decreased the quantity portion of ethanol when the yield of diosgenin stayed unmodified. The production procedure of diosgenin, which makes use of surfactant salt lauryl sulfate as removal agent as well as flocculation technology as the core, successfully decreases the amount of acid utilized in the production procedure of diosgenin, reduces pollution and also decreases expenses. Nonetheless, there is usually a phenomenon that diosgenin crystals are encapsulated by dodecyl alcohol (oil), that makes it challenging to different diosgenin, and the obtained diosgenin products are commonly of reduced pureness.
CN201410145370.4 gives a technique for dividing high-purity diosgenin, which is straightforward to operate as well as eco-friendly, and also can effectively solve the problem of difficult splitting up and also filtration of diosgenin.
The here and now innovation is recognized with the complying with technical services:
An approach for separating high-purity diosgenin, including two actions of rough splitting up and also fine treatment. The specific operating actions of the rough separation are:
1) Submerse the smashed Dioscorea scutellariae in salt lauryl sulfate remedy, essence for 2-4 hours, ultrasonically extract, and then centrifuge to get the dioscin remove and filter residue;
2) Remain to ultrasonically remove the filter deposit with sodium lauryl sulfate service, after that centrifuge, and incorporate the essence gotten by centrifugation with the dioscin remove obtained in step 1) to acquire the complete dioscin essence;
3) According to the quantity ratio of total dioscin extract: flocculant An aqueous remedy = 100: (4-10), include 0.8% to 1.2% flocculant An aqueous solution to the overall dioscin remove by mass fraction up until micelles are formed Finally, quit stirring, and after standing still for 5-20 minutes, filter to get filter residue 1 and filtrate 1, then include a liquid service of flocculant B with a mass portion of 2% -6% to filtrate 1, and also stand at 40-50 ° C for 1-2 After 3 hours, centrifuge to get filtrate 2 as well as filter deposit 2. Combine filter deposit 1 as well as filter residue 2 to obtain unrefined diosgenin;
Wherein, the flocculant A consists of 95% -100% chitosan and also 0% -5% xanthan gum in mass portion; the flocculant B includes 55-60% Rod bentonite, 40-45% bentonite making clear agent;
4) According to the ratio of adding 2.5-3mL of sulfuric acid per g of unrefined dioscin, include the crude diosgenin to sulfuric acid with a concentration of 1.3-1.8 mol/L, hydrolyze it at 105-108 ° C for 4-6 hours, as well as dissolve the hydrolyzate After cooling as well as reducing the effects of, filter, wash the filter deposit with water until the effluent is neutral, and after that completely dry, then remove the dried out filter residue by reflux, amazing and also take shape to obtain crude diosgenin;
The particular steps of the great treatment are:
( 1) Dropping water at a temperature level of 60-90 ° C into the crude product of diosgenin, mixing well, after that centrifuging, disposing of the upper layer of water and oil to acquire diosgenin;
( 2) After duplicating the operation of step (1) for 2 to 4 times on the purified diosgenin, the diosgenin with moisture is dried to obtain high-purity diosgenin.
