Xylooligosaccharide composition with high purity
A xylooligosaccharide, high-purity technology, applied in the direction of oligosaccharides, oligosaccharide-containing food ingredients, sugar derivatives, etc., can solve the problem of low polymerization degree, less UV absorbing substances and coloring substances, and no xylooligosaccharides And other issues
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Embodiment 1
[0058] [Example 1] Production of high-purity xylo-oligosaccharide liquid
[0059] (1) Soak the corn cobs broken into fine pieces in warm water dissolved with caustic soda, keep stirring at 90°C for 90 minutes, filter, wash with warm water, and remove alkali components until the pH drops to 11 or lower 11.
[0060] (2) Water was added to the pre-treated solid, and the pH was adjusted to 5.6 with sulfuric acid or sodium hydroxide, then xylanase was added, and the enzyme reaction was carried out at 46° C. for 12 hours.
[0061] (3) keep the liquid temperature of the enzyme reaction solution at 46°C, continuously add milk of lime (CaO) equivalent to 40% by weight or more than 40% by weight of the corn cob raw material to this saccharification reaction solution, and then blow carbon dioxide to control pH at 8.5 or so, filter immediately after the end to obtain a clear sugar liquid.
[0062] (4) The above clarified filtrate was continuously passed through a cation exchange resin (...
Embodiment 2
[0071] [Example 2] Production of high-purity xylo-oligosaccharide powder
[0072] After the first mixed bed ion exchange resin treatment in Example 1, it was concentrated to a sugar solution with a sugar concentration of 50% Brix, and the mixed bed ion exchange resin treatment was performed again. sugar, thereby making a xylo-oligosaccharide solution with 5% or less monosaccharides. This solution was treated with activated carbon in the same manner as in Example 1, then celite was added, and the activated carbon was removed by filtration. By spray drying, high-purity xylo-oligosaccharide powder with a moisture content of 6% or less can be produced.
[0073] The sugar composition ratio of the above powder is: xylose 0.67%, xylobiose 33.2%, xylotriose 13.78%, oligosaccharides with a degree of polymerization equal to or greater than xylotetraose 46.29%, cellobiose 4.4%, glucose and other monosaccharides 1.59%.
[0074] The above powder was dissolved in purified water to prepar...
Embodiment 3
[0076] [Example 3] Effect of activated carbon treatment of high-concentration sugar liquid
[0077] The sugar solution obtained in Preparation Example 1, which has undergone the first mixed-bed ion exchange resin (Mitsubishi Diaion PK 216, PA 412) desalination and then concentrated to a sugar concentration of 50% solid content, and the sugar solution by weight It was diluted 10 times to prepare a sugar solution with a solid content of 5%. To the sugar solution with a solid content of 50%, the weight ratio of the solid content is 2%, 4%, and 8% of activated carbon (1%, 2%, and 4%, respectively, relative to the solution); To the sugar solution with a solid content of 5%, activated carbon was added at a weight ratio of 2%, 4%, and 8% to the solid content, respectively (0.1%, 0.2%, and 0.4% by weight relative to the solution), After stirring at 50°C for 60 minutes, filtration was performed.
[0078] The results show that when the weight ratio of the added activated carbon to the...
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