Decolorization and deproteinization process of mesona chinensis benth polysaccharide solution

Abstract

The invention discloses a decolorization and deproteinization process of mesona chinensis benth polysaccharide solution. The decolorization and deproteinization process comprises the following steps of: boiling picked dried mesona chinensis benth with sodium carbonate aqueous solution with concentration of 0.4 percent, which is 20 times the volume of the dried mesona chinensis benth, for 2 hours; filtering until the obtained product is clarified; regulating a pH (Potential of Hydrogen) value of liquor to be 6.0; stirring and slowly adding 4 percent ZTC-IIB type clarifier at the temperature of 70 DEG C and stopping stirring for 1 hour after addition; stirring and slowly adding 2 percent of ZTC-IIA type clarifier when the temperature is reduced to 50 DEG C and stopping stirring for 1 hour after addition; heating to 80 DEG C; standing for 15 minutes; filtering off precipitate by using a tubular centrifuge; adjusting the pH of filtrate to be 5.5; keeping the temperature at 45 DEG C; controlling flow velocity to be 3 BV/hour, wherein the using amount of over weak base anion exchange resin is 30 percent of the liquor; then performing vacuum decompression and concentration on the decolorized liquor until the concentration is 20 percent; and finally performing spray-drying with a spray-drying tower to obtain mesona chinensis benth polysaccharide. The application field of the mesona chinensis benth polysaccharide is greatly expanded, the mesona chinensis benth polysaccharide decolorization rate can reach 95 percent, the protein removal rate can reach 90 percent, and the polysaccharide loss rate is only 10-15 percent.

Description

technical field [0001] The invention relates to a decolorization and deproteinization process method of plant polysaccharides, especially can remove a large amount of jelly grass pigment and plant protein contained in the jelly jelly polysaccharide extract, and has the advantages of low cost, high removal rate and low polysaccharide loss. The low characteristic is suitable for industrialized production. Background technique [0002] Grass jelly polysaccharide is a gelatinous polysaccharide contained in grass jelly plants. Studies have shown that grass jelly polysaccharide is composed of rhamnose, arabinose, galactose, glucose, xylose, mannose, galactose Aldehydic composition. It can form a gel with special taste and texture with amylose. It is a new type of coagulant and can be used to make health foods such as jelly jelly with heat-clearing and detoxifying effects and various functional foods. For example, compounding jelly polysaccharides with other edible gums can produ...

AI Technical Summary

Problems solved by technology

There are two reasons for this: ①The jelly jelly extract contains a large amount of jelly jelly pigment (a kind of brown anthocyanin). If only the traditional activated carbon adsorption decolorization method is used, since the activated carbon adsorption is non-selective, when the color is removed completely, Grass jelly polysaccharide is also basically lost

②A large amount of plant protein is mixed in the jelly grass extract, which greatly reduces the purity of jelly jelly polysaccharides and also deepens the color of jelly jelly polysaccharides

For example, the traditional trichloroacetic acid, Sevage method, and enzymatic method all have the disadvantages that it is not easy to realize industrial production and the cost is high.