Preparation of attapulgite selectively absorbing tannin

A technology of modifying attapulgite and attapulgite, which is applied in the preparation of sugar derivatives, other chemical processes, esterified saccharides, etc., to achieve good selective adsorption capacity, increase speed and effect, and large adsorption capacity.

CN101607190AInactive Publication Date: 2009-12-23HUAIYIN INSTITUTE OF TECHNOLOGY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-12-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to preparation of an organomodified attapulgite selectively absorbing tannin. The invention uses agitating heating and auxiliary ultrasonic processing to be cooperated with a cationic surfactant to modify attapulgite, so that suspended particles suspend in liquid, and materials in the system are scattered and mixed evenly so as to not only boost the effects of heat transfer, mass transfer and ion exchange, but also cause the interaction between the hydrated cation of attapulgite fibrous crystals and NH4 of the organic cationic surfactant to be faster and more effective. The prepared organomodified attapulgite products have the capability of selectively absorbing plant active component-tannin, and can separate tannin from flavonoid active components that are difficult to be separated from tannin due to similarity in aspects of structure and physicochemical properties between the tannin and the flavonoid active components. Therefore, attapulgite adsorbent has practical application value in the absorption of tannic acid.
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Description

technical field

[0001] The invention relates to the application of natural mineral resources attapulgite, more specifically to the preparation of organically modified attapulgite for selectively adsorbing tannin, and belongs to the technical field of development and utilization of high value-added attapulgite. Background technique

[0002] The polyphenolic hydroxyl structure of tannin endows it with a series of unique chemical properties and physiological activities, and has been widely used in daily chemical industry, pharmaceutical industry, food industry, leather industry and other aspects. Tannins are secondary metabolites in plants, and usually contain tannins in the active ingredient extracts of plants. However, since tannins have certain anti-nutritional and toxic side effects, it is necessary to carry out adsorption and enrichment treatment for tannins in plant active ingredients. In this way, the tannins in the plant active ingredients can be removed, and the enric...

Examples

Embodiment 1

[0020] Preparation of organic attapulgite adsorbent: Add 10 g of sodium attapulgite to 100 mL of deionized water, keep the temperature at 50 ° C, stir and ultrasonically treat the attapulgite to disperse the attapulgite evenly, add 3.5 mmol of octadecyltrimethyl bromide Ammonium chloride, the mechanical stirring speed is 1000r / min, the ultrasonic screen current is 0.6A, and the treatment is 5min. Suction filtration, washing, drying, crushing, and passing through a 200-mesh sieve to obtain octadecyltrimethylammonium bromide-modified attapulgite powder with a grafting rate of 50%.

[0021] Soybean isoflavones belong to the isoflavones in flavonoids, and mainly exist in the form of genistein (genistein), daidzin, malonyl genistein, and malonyl daidzin. The main components of soybean isoflavones used in this example are genistin and daidzein.

[0022] Selective adsorption of tannin by adsorbent: take 50mL soybean isoflavone-tannic acid mixed solution, the concentration is 500mg / L...

Embodiment 2

[0025] Preparation of organic attapulgite adsorbent: Add 10 g of sodium attapulgite to 100 mL of deionized water, keep the temperature at 45 ° C, stir and ultrasonically treat the attapulgite to disperse the attapulgite evenly, add 3 mmol of octadecyltrimethyl chloride Ammonium chloride, the mechanical stirring speed is 1000r / min, the ultrasonic screen current is 0.6A, and the treatment is 5min. Suction filtration, washing, drying, crushing, and passing through a 200-mesh sieve to obtain octadecyltrimethylammonium chloride modified attapulgite powder with a grafting rate of 50%.

[0026] Puerarin, chemical name 8-β-D-glupanose-4', 7-diurinyl isoflavone, is one of the main flavonoid active substances in the leguminous plant Pueraria mirifica. In order to further verify the selective adsorption of tannin by organically modified attapulgite, this example mixed puerarin with tannic acid for adsorption research.

[0027]Selective adsorption of tannin by adsorbent: take 50mL puerar...

Embodiment 3

[0029] Preparation of organic attapulgite adsorbent: Add 10 g of sodium attapulgite to 100 mL of deionized water, keep the temperature at 50 ° C, stir and ultrasonically treat attapulgite to disperse the attapulgite evenly, add 3 mmol of hexadecyl trimethyl bromide Ammonium chloride, the mechanical stirring speed is 1000r / min, the ultrasonic screen current is 0.6A, and the treatment is 5min. Suction filtration, washing, drying, crushing, and passing through a 200-mesh sieve to obtain cetyltrimethylammonium bromide-modified attapulgite powder with a grafting rate of 50%.

[0030] Tea polyphenols mainly contain catechin (C), epicatechin (EC), citrus catechin (GC), epicitrus catechin (EGC), catechin citrate (CG), Theophylline citrate (ECG), orange catechin citrate (GCG), epicitrus catechin citrate (EGCG). These substances are all derivatives of flavonoids, the relative molecular weight is less than 500, and they are active ingredients extracted from plants with various biologica...