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A kind of method for preparing moisturizer from yam skin dregs

A technology of yam peel and moisturizing agent is applied in the directions of skin care preparations, pharmaceutical formulations, cosmetic preparations, etc., and can solve the problems of allantoin with by-products, hidden dangers to human health and safety, and high synthesis cost, and achieve moisturizing effect. Obvious, low-cost, easy-to-use effects

Active Publication Date: 2015-09-16
FARM PROD PROCESSING & NUCLEAR AGRI TECH INST HUBEI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Now the production of allantoin is mainly based on chemical synthesis method. The advantage of chemical synthesis method is that it can be produced on a large scale, but the synthesis cost is relatively high, and the synthesized allantoin often has by-products, which has a certain impact on human health. security risks
The extraction methods of polysaccharides mainly include methods such as leaching method and ultrasonic method. Although there are many reports on the extraction technology of allantoin and polysaccharides, there are few methods for preparing allantoin and polysaccharides at the same time. Method for Extracting Polysaccharides and Allantoin from China "(Chinese Patent No. 200610069598.5), the Chinese yam is washed, sliced, milled, filtered and put into the extraction kettle, and the crude extract and filtrate of the Chinese yam polysaccharide are extracted by CO2 cooling, and the crude yam polysaccharide is extracted The extract is left to stand and centrifuged to obtain the yam polysaccharide extract and the filtrate II. Ultrasonic extraction is used to extract the allantoin from the filtrate I and the filtrate II, and the allantoin is extracted by reversed-phase chromatography.
The technical means provided by it are not suitable for industrialized expansion of production, and the extraction raw material is yam, the extraction rate is low, and the operation is complicated

Method used

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  • A kind of method for preparing moisturizer from yam skin dregs

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Place the yam peeled dregs in an oven and bake at 60°C for 8 hours, pulverize them with a pulverizer, and pass through an 80-mesh sieve to obtain yam skin powder;

[0031] (2) Add water 20 times the weight of yam skin powder and 0.4% cellulase to the yam skin powder obtained in step (1), adjust the pH value to 4.5 with 1M HCl, extract at a temperature of 45°C for 120 minutes, and extinguish in a boiling water bath Enzyme for 5 minutes; add 2% neutral protease, adjust the pH value to 7.5 with 10% NaOH, extract at 50°C for 100 minutes, and inactivate the enzyme in a boiling water bath for 5 minutes;

[0032] (3) Centrifugal separation: centrifuge the enzymatic hydrolyzate obtained in step (2) at a speed of 4500r / min for 20min to obtain a supernatant;

[0033] (4) Ultrafiltration: The clear liquid obtained in step (3) is separated with an ultrafiltration membrane with a molecular weight cut-off of 5000, the operating pressure is 0.4MPa, the feed liquid temperature is 4...

Embodiment 2

[0036] Embodiment 2: with embodiment 1, the difference is,

[0037] (2) Add water 10 times the weight of yam skin powder and 0.1% cellulase to the yam skin powder obtained in step (1), adjust the pH value to 4.0 with 1M HCl, extract at a temperature of 35°C for 60 minutes; add 1 % neutral protease, adjust the pH value to 6.5 with 10% NaOH, extract at 40°C for 80 minutes, and inactivate the enzyme in a boiling water bath for 5 minutes;

[0038] (4) Ultrafiltration: The supernatant liquid obtained in step (3) was separated with an ultrafiltration membrane with a molecular weight cut-off of 10,000, the operating pressure was 0.1 MPa, the feed liquid temperature was 25°C, and the extraction rate of allantoin was 6.1%. The non-permeate is then separated by an ultrafiltration membrane with a molecular weight cut-off of 20,000Da, the operating pressure is 0.4MPa, and the temperature of the feed liquid is 25°C;

[0039] (5) Add 3 times the volume of 95% ethanol to the non-permeated l...

Embodiment 3

[0041] Embodiment 3: with embodiment 1, the difference is,

[0042] (2) Add water 30 times the weight of yam skin powder and 0.2% cellulase to the yam skin powder obtained in step (1), adjust the pH value to 5.0 with 1M HCl, extract at a temperature of 45°C for 180 minutes; add 3 % neutral protease, adjust the pH value to 8.5 with 10% NaOH, extract at 60°C for 120 minutes, and inactivate the enzyme in a boiling water bath for 5 minutes;

[0043] (4) Ultrafiltration: The supernatant liquid obtained in step (3) was separated with an ultrafiltration membrane with a molecular weight cut-off of 20,000, the operating pressure was 0.2 MPa, the feed liquid temperature was 35°C, and the extraction rate of allantoin was 5.26%. The non-permeated liquid is then separated with an ultrafiltration membrane with a molecular weight cut-off of 50,000 Da, the operating pressure is 0.3 MPa, and the feed liquid temperature is 35 °C;

[0044] (5) Add 2 times the volume of 95% ethanol to the impermea...

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Abstract

The invention relates to a method for preparing a moisturizing agent from yam skin residues. The method comprises the following steps: adding cellulase into yam skin powder obtained after yam skin residues are baked and crushed, adjusting the pH value of the obtained mixture to extract, carrying out enzyme deactivation by using a boiling water bath, adding neutral protease into the obtained object, adjusting the pH value of the obtained mixture to extract, and carrying out centrifugal separation on enzymatic hydrolysate so as to obtain liquid supernatant; separating the liquid supernatant by using an ultrafiltration membrane, decoloring permeate liquid by using neutral alumina, and sequentially carrying out reduced-pressure concentration and vacuum drying on the obtained object so as to obtain allantoin; separating non-permeate liquid by using an ultrafiltration membrane, and collecting non-permeate liquid; adding 95% ethanol into the non-permeate liquid, standing the non-permeate liquid so as to obtain flocculent precipitates, and carrying out centrifugal separation and vacuum drying on the flocculent precipitates so as to obtain yam polysaccharide; mixing the allantoin and the yam polysaccharide in proportion, and carrying out superfine grinding on the obtained mixture so as to obtain the moisturizing agent. According to the invention, allantoin and yam polysaccharide are simultaneously prepared by taking scrapped yam skin residues as raw materials, so that the utilization rate of raw materials is greatly improved, and the method is simple in operation, high in extraction efficiency, less in used organic solvents, and low in cost; the prepared moisturizing agent has high moisture retention and skin compatibility, has no toxic or side effect, and can be applied to medicines and cosmetics.

Description

technical field [0001] The invention belongs to the technical field of yam processing, and in particular relates to a method for preparing a moisturizing agent by extracting allantoin and yam polysaccharide from yam skin dregs. Background technique [0002] Yam skin dregs are wastes produced during the processing and eating of yams, which are basically discarded without development and utilization, causing great pollution to the environment. Yam dregs contain a large amount of saponins, amino acids, proteins, flavonoids, polysaccharides, allantoin and other ingredients. Among them, allantoin can directly act on keratin, increase and promote the hydration capacity of the stratum corneum, increase its ability to bind water, reduce water loss, make the skin smooth, moist and flexible, and relieve and treat dry skin. Moisturizes the skin. It can also promote skin cell regeneration, accelerate wound healing, and is a good healing agent and anti-ulcer agent for skin wounds. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/49A61K8/73A61K47/36A61K47/28A61Q19/00C07D233/88C08B37/00
Inventor 乔宇李阳廖李程薇谷峰王俊汪兰吴文锦丁安子熊光权王少华高虹史德芳
Owner FARM PROD PROCESSING & NUCLEAR AGRI TECH INST HUBEI ACAD OF AGRI SCI