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Method for extracting polyphenol from chestnut shells

A chestnut shell and solvent extraction technology, applied in organic chemistry and other directions, can solve the problems of poor safety, large preparation amount, complicated process, etc., and achieve the effect of strong scavenging free radicals and antioxidant activity, increasing added value, and easy operation and amplification.

Inactive Publication Date: 2012-07-11
WEIHAI TIANHONG AGRI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyphenols extracted by solvent have low purity and weak activity; supercritical CO 2 Although the extraction method has high product purity, the process is complicated, the operation is inconvenient, and the cost is high; the heavy metal salt precipitation method will cause heavy metal residues and poor safety; the resin method has a high content of polyphenols and a large amount of preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Chestnut shells are crushed through a 40-mesh sieve, and the flocs in the shells are removed, 1kg of chestnut shell powder is weighed and packed into a percolation column, and the bulk volume of chestnut shells measured by compaction is 700ml, and 700ml of 30% ethanol solution is added, Soak at 70°C for 0.2 hours; 2100ml of 30% ethanol solution flows through the percolation column from top to bottom for percolation extraction, the flow rate of the extraction solvent is 350ml / hour, and the temperature of percolation extraction is 70°C, collect the leachate, and concentrate under reduced pressure Obtain permeate. Concentrate the leachate at 40°C and 0.1MPa to remove ethanol, and pump the remaining polyphenol aqueous solution into the equilibrated AB-8 macroporous resin column at a speed of 4ml / min. Wash the column with 5 times the column volume of distilled water, then elute with 50% ethanol aqueous solution at a flow rate of 4ml / min, collect the 50% ethanol eluate, conce...

Embodiment 2

[0024] Chestnut shells are crushed through a 60-mesh sieve, and the flocs in the shells are removed, 1kg of chestnut shell powder is weighed and packed into a percolation column, and the bulk volume of chestnut shells measured by compaction is 700ml, and 700ml of 90% ethanol solution is added, Soak at 30°C for 1 hour; 2100ml of 90% ethanol solution flows through the percolation column from top to bottom for percolation extraction. The flow rate of the extraction solvent is 350ml / hour, and the temperature of percolation extraction is 30°C. Collect the leachate and concentrate under reduced pressure Obtain permeate. Concentrate the leachate at 40°C and 0.1MPa to remove ethanol, and pump the remaining polyphenol aqueous solution into the equilibrated DM130 macroporous resin column at a speed of 4ml / min. Wash the column with 5 times the column volume of distilled water, then elute with 50% ethanol aqueous solution at a flow rate of 4ml / min, collect the 50% ethanol eluate, concentr...

Embodiment 3

[0026] Chestnut shells are crushed through a 60-mesh sieve, and the flocs in the shells are removed, 1kg of chestnut shell powder is weighed and packed into a percolation column, and the bulk volume of chestnut shells measured by compaction is 700ml, and 420ml of 90% ethanol solution is added, Soak at 50°C for 1 hour; 1400ml of 90% ethanol solution flows through the percolation column from top to bottom for percolation extraction. The flow rate of the extraction solvent is 140ml / hour, and the temperature of percolation extraction is 50°C. Collect the leachate and concentrate under reduced pressure Obtain permeate. Concentrate the leachate at 40°C and 0.1MPa to remove ethanol, and pump the remaining polyphenol aqueous solution into the equilibrated DM130 macroporous resin column at a speed of 4ml / min. Rinse the column with 5 times the column volume of distilled water, then elute with 70% ethanol aqueous solution at a flow rate of 4ml / min, collect the 70% ethanol eluate, concent...

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PUM

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Abstract

The invention relates to a method for extracting polyphenol in the field of chemical industry, in particular to a method for extracting polyphenol from chestnut shells. The method comprises the following steps of: crushing, percolating, concentrating, enriching / separating, concentrating and drying, and thus obtaining brownish red chestnut shell polyphenol. The invention has the advantages that: the polyphenol is high in content and good in quality, and the extracting rate can reach 60 percent; and the method is simple in production process, low in cost, pollution-free and suitable for industrialized production. By the method, the waste, namely the chestnut shell resource is furthest utilized, and the additional value of chestnuts is improved; and a new path for preparing a natural plant polyphenol antioxidant is developed for food and pharmaceutical industry.

Description

technical field [0001] The invention relates to a method for extracting polyphenols in the chemical industry, in particular to a method for extracting polyphenols from chestnut shells Background technique [0002] Chestnut (Castanea mollissima Blume) belongs to the Fagaceae (Fagacene) plant, and its fruit is commonly called as chestnut, and is one of the main special products of my country. Because it is rich in sugar, starch, protein and various vitamins and minerals, and has low fat content. Sweet and warm in taste, non-toxic, it has the effects of invigorating the spleen and stomach, invigorating the kidney and strengthening tendons. Therefore, it has always been a kind of health food that people like very much. In recent years, with the increase of chestnut planting area and the continuous deepening of chestnut deep processing, the number of chestnut shells, which account for nearly 20% of chestnuts, has also increased sharply. At present, the processing of chestnut s...

Claims

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Application Information

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IPC IPC(8): C07G99/00C07D311/62
Inventor 毕云英
Owner WEIHAI TIANHONG AGRI TECH
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