Solid acid catalyst for preparing monosaccharide and method for preparing monosaccharide from seaweed using same
A solid acid catalyst and solid acid technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low saccharification yield, by-products, and high cost of lignocellulose processing. Reach the effect of reducing manufacturing cost and preventing the occurrence of by-products
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Embodiment 1
[0052] Example 1: Preparation of solid acid catalyst
[0053] The rice husk was carbonized in a heating furnace at a temperature of 600°C for 3 hours. Then, the carbonized shell was immersed in an aqueous sodium hydroxide solution having a concentration of 50%, and kept for about 30 minutes. The ratio between the mass of the carbonized shell and the volume of the sodium hydroxide aqueous solution was 0.03 g / mL (carbonized material: 3 g, sodium hydroxide aqueous solution: 100 mL).
[0054] Then, chlorosulfonic acid was injected into the obtained solution until the pH reached 7, and nitric acid was injected therein until the final solution had a pH of 4, thereby obtaining particles. The obtained particles are centrifuged, and the recovered particles are washed with acetone several times, and dried, thereby obtaining a solid acid catalyst in the form of particles using the carbonized shell. The solid acid catalyst is formed in the form of particles having a particle diameter of 100...
Embodiment 2
[0055] Example 2: Preparation of monosaccharides using solid acid catalyst
[0056] The dried Won Jiangli was pulverized by a pulverizer (Shreco Company, Korea) to prepare a crushed Jiangli having a particle size of 100 microns.
[0057] An alkaline aqueous solution having a pH of 9 was prepared by adding 1N sodium hydroxide solution to water. 4 g of the crushed Jiangli was injected into 200 mL of an alkaline aqueous solution to have a concentration of 0.02 g / mL, and kept for 60 minutes while stirring at a temperature of 100°C. The solid component and the viscous liquid component are separated from the mixture to obtain agar.
[0058] The viscous agar as the separated liquid component was injected into dimethyl sulfoxide (Daejung Chemicals & Metals Co. Ltd., Korea) having a volume 3 times the volume of the liquid component and stirred (volume of the viscous agar liquid component: about 100 mL , DMSO: 300 mL). Adjust the temperature to 80°C. The mixture was maintained in the abov...
Embodiment 3
[0062] Example 3: Preparation of monosaccharides using Gelidium amansii and glial plants
[0063] Agarose was prepared by the same method as in Example 2, except that crushed Gelidium and Glia with a particle size of 150 microns were used instead of using Jiangli as raw materials. As a result, 4 g of agarose was obtained from the seaweed powder.
[0064] 10 g of the white precipitate was injected into 100 mL of the aqueous solution into which 20 g of the solid acid according to Example 1 was injected, and maintained at a temperature of 120° C. for 2 hours. After the reaction time has elapsed, the supernatant is extracted and analyzed by DNS glycoanalysis. As a result of analysis of the obtained product, 2 g of monosaccharide was obtained at a yield of 50% relative to 4 g of agarose.
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