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Decolorization method for raffinose raffinate

A technology of raffinose and extract, which is applied in the production of sugar, oligosaccharides, sugars, etc., can solve problems such as simplification, and achieve the effects of simple operation, short production cycle and convenient operation

Active Publication Date: 2009-02-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the gossypol pigment has many characteristics different from other impurities in the extract, the removal of the gossypol pigment usually needs to be carried out separately, and the process cannot be simplified by merging or other methods. Therefore, the method of decolorizing the raffinose extract can only By improving on the basis of existing technology, it is more suitable for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Preparation of Raffinose Extraction

[0043] Degreased cottonseed meal (wherein the mass percentage of raffinose is 3.9%) is sieved through a 1.8mm sieve, weighs 435 grams and puts it into a percolation column (Φ3.5cm×70cm), and its cumulative volume after filling is uniform About 560 milliliters, then add 350 milliliters of 75% ethanol aqueous solution to the percolation column, soak at 55°C for 30 minutes to fully swell the defatted cottonseed meal, open the outlet valve of the percolation column, and simultaneously Add extraction solvent continuously, control flow rate to be 168 milliliters / hour, until the volume that collects percolation extraction liquid is 1900 milliliters. The percolating liquid is analyzed, and solid content (solid content refers to the percentage that the quality when solution is dried to constant weight accounts for the percentage of solution mass before drying, the same below) is 4.2%; The mass percentage of raffinose is 38.2% bas...

Embodiment 2

[0045] Embodiment 2: the decolorization of raffinose extract

[0046] The degreased cottonseed meal ethanol extract (solid content 5%) prepared by the process of Example 1 was concentrated under reduced pressure to 1 / 10 of the original volume to obtain a concentrated solution, and deionized water with 4 times the volume of the concentrated solution was added to prepare an aqueous solution (solid content 10%), adding hydrochloric acid with a mass percent concentration of 5% to adjust the pH value of the solution to 5.

[0047] Put 230 grams of granular activated carbon into a fixed bed adsorption column with a size of Φ5.6cm×40cm, and the column bed volume BV is 980mL. Continuously feed the above-mentioned weakly acidic aqueous solution into the fixed-bed adsorption column at a flow rate of 1.0BV / h and collect the effluent at the outlet until about 10BV of decolorized liquid is collected. In the sample loading process, the color of the decolorized liquid flowing out is obvious...

Embodiment 3

[0049] Embodiment 3: the decolorization of raffinose extract

[0050] The degreased cottonseed meal ethanol extract (solid content 5%) prepared by the process of Example 1 was concentrated under reduced pressure to 1 / 10 of the original volume to obtain a concentrated solution, and deionized water with 4 times the volume of the concentrated solution was added to prepare an aqueous solution (solid content 10%), adding hydrochloric acid with a mass percent concentration of 5% to adjust the pH value of the solution to 4.

[0051] About 700 grams of macroporous adsorption resin HZ816 was loaded into an adsorption column with a size of Φ5.6cm×40cm, and the column bed volume BV was 980mL. Continuously feed the raffinose aqueous solution into the fixed-bed adsorption column at a flow rate of 1.0 BV / h and collect the effluent at the outlet until about 6 BV of decolorized liquid is collected. In the sample loading process, the color of the decolorized solution flowing out is obviously ...

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Abstract

The present invention discloses a method for decoloring raffinose extract by adopting fixed bed type adsorptive separation. In the method, after raffinose alcohol extract is condensed and alcohol is removed, aqueous solution, the solid content of which is 10 percent, is prepared; pH is regulated to 4 to 6; the prepared solution passes through a fixed bed absorption column containing particulate active carbon, non-polar absorption resin or weak-polar absorption resin in order to remove pigments such as gossypol; and finally, 60 percent to 75 percent ethanol is used to regenerate the absorption column. In the method, the decoloring rate of the extract is more than 90 percent, and the yield of raffinose is higher than 95 percent. The method has the advantages of simple process flow, convenient adsorbent regeneration, low production cost, easy industrialized production, and the like.

Description

technical field [0001] The invention relates to a method for decolorizing a raffinose extract, belonging to the technical field of adsorption and separation. Background technique [0002] Raffinose, also known as Melitriose and raffinose, is composed of galactose, glucose and fructose, and is an oligosaccharide and a non-reducing sugar. Research has found that raffinose is an excellent nutrient source for beneficial bacteria such as Bifidobacterium and Lactobacillus acidophilus in the human intestinal tract, which can promote their proliferation, thereby inhibiting the growth of spoilage bacteria in the intestinal tract and reducing the formation of toxic fermentation products . Bifidobacteria ferment raffinose to produce a large amount of short-chain fatty acids, which can stimulate intestinal peristalsis, increase stool moisture and maintain a certain osmotic pressure, thereby preventing constipation. In addition, raffinose can improve the digestive function of the human...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/06C13K13/00B01D15/08
Inventor 任其龙鲍宗必苏宝根杨亦文苏云邢华斌
Owner ZHEJIANG UNIV
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