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Preparation method of wild jujube nuclear shell xylose and silicon dioxide

A core-shell xylose, silicon dioxide technology, applied in the preparation of silicon dioxide, silicon oxide, sugar derivatives, etc., can solve the problems that have not been seen before, and achieve the effect of important economic and social value

Active Publication Date: 2015-12-02
SHAANXI UNIV OF CHINESE MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far there is no relevant report on the preparation of xylose from jujube core shell

Method used

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  • Preparation method of wild jujube nuclear shell xylose and silicon dioxide
  • Preparation method of wild jujube nuclear shell xylose and silicon dioxide
  • Preparation method of wild jujube nuclear shell xylose and silicon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (1) Take jujube core shell, dry and crush, add distilled water and boil for 2 hours, filter after cooling, and dry the filter residue;

[0074] (2) Take the filter residue in step (1), add 2.0mol / L sulfuric acid, the ratio of solid to liquid is 1:4, at a temperature of 170°C, the reaction time is 2h, suction filter after cooling, and wash the filter residue with water to obtain the filtrate and filter residue;

[0075] (3) Take the filtrate in step (2) at 70-75°C, adjust the pH to 3.0-3.5, decolorize with activated carbon, filter with suction, add absolute ethanol after the filtrate is concentrated, stir in a water bath at 40°C, concentrate under reduced pressure, and crystallization is obtained. xylose, suction filtration, washing off the mother liquor on the crystal surface with absolute ethanol, and drying at 100°C to obtain jujube kernel-shell xylose.

Embodiment 2

[0077] (1) Take jujube core shells, dry and crush them, add distilled water to boil for 1 hour, filter after cooling, and dry the filter residue;

[0078] (2) Take the filter residue in step (1), add 2.0mol / L sulfuric acid, the ratio of solid to liquid is 1:5, at a temperature of 160°C, the reaction time is 1h, suction filter after cooling, and wash the filter residue with water to obtain the filtrate and filter residue;

[0079] (3) Take the filtrate in step (2) at 70-75°C, adjust the pH to 3.0-3.5, decolorize with activated carbon, filter with suction, add absolute ethanol after the filtrate is concentrated, stir in a water bath at 40°C, concentrate under reduced pressure, and crystallization is obtained. xylose, suction filtration, washing off the mother liquor on the crystal surface with absolute ethanol, and drying at 95°C to obtain jujube kernel-shell xylose.

Embodiment 3

[0081] (1) Take jujube core shells, dry and crush them, add distilled water to boil for 3 hours, filter after cooling, and dry the filter residue;

[0082] (2) Take the filter residue in step (1), add 2.0mol / L sulfuric acid, the ratio of solid to liquid is 1:3, at a temperature of 150°C, the reaction time is 3h, suction filter after cooling, and wash the filter residue with water to obtain the filtrate and filter residue;

[0083] (3) Take the filtrate in step (2) at 70-75°C, adjust the pH to 3.0-3.5, decolorize with activated carbon, filter with suction, add absolute ethanol after the filtrate is concentrated, stir in a water bath at 40°C, concentrate under reduced pressure, and crystallization is obtained. xylose, suction filtration, washing off the mother liquor on the crystal surface with absolute ethanol, and drying at 98°C to obtain jujube kernel-shell xylose.

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Abstract

The invention provides a preparation method of wild jujube nuclear shell xylose and silicon dioxide. The preparation method comprises the following steps of using wild jujube nuclear shells as raw materials; performing hydrolysis by using sulfuric acid to obtain filter liquor and filter residues; adjusting pH (potential of hydrogen) value of the filter liquor to be 3.0-3.5 by using calcium hydroxide; performing active carbon decoloration and suction filtration; adding absolute ethyl alcohol after the filter liquor is concentrated; performing decompressed concentration after uniformly stirring on waterbath; separating out white crystals to obtain the xylose; performing suction filtration and washing off mother liquor on surfaces of the crystals by using a small amount of absolute ethyl alcohol; drying at the temperature of 100 DEG C to obtain the wild jujube nuclear shell xylose; and calcining filter residues of the xylose at high temperature to prepare the silicon dioxide.

Description

technical field [0001] The invention belongs to the technical field of traditional Chinese medicine extraction, and in particular relates to a preparation method of jujube kernel shell xylose and silicon dioxide. Background technique [0002] Ziziphus jujuba Mill.var.spinosa (Bunge) HuexH.F.Chow is a plant of the genus Jujube in the family Rhamnaceae, which is widely distributed throughout my country, especially in the north. It is one of the important forest resources for windbreak and sand fixation and income generation for farmers. At present, the utilization of wild jujube resources is mainly to collect wild jujube kernels for medicinal purposes, while other non-traditional medicinal parts - pulp, core shell, etc., are mostly treated as waste. Studies have shown that the pulp also contains a large amount of resource-based chemical components, and the jujube core and shell are rich in lignin and minerals, which are excellent materials for preparing xylose and developing w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/02C07H1/00C01B33/12
Inventor 张严磊唐志书宋忠兴段金廒
Owner SHAANXI UNIV OF CHINESE MEDICINE
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