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Extraction method of pectin and polyphenols in citrus peel

An extraction method and citrus peel technology are applied in the field of simultaneously extracting and preparing pectin and polyphenols from citrus peel residue based on subcritical water technology, which can solve the problems of environmental pollution, large waste water, complicated processes and the like, and achieve high extraction efficiency, The effect of reducing pollution and simple process

Active Publication Date: 2017-04-19
HUNAN AGRI PRODS PROCESSING INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods all use step-by-step extraction, the process is more complicated, and when preparing pectin, it is necessary to add an external source of inorganic acid to dissolve pectin, so a large amount of waste water is generated, which is easy to cause environmental pollution problems

Method used

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  • Extraction method of pectin and polyphenols in citrus peel
  • Extraction method of pectin and polyphenols in citrus peel
  • Extraction method of pectin and polyphenols in citrus peel

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A method for extracting pectin and polyphenols in citrus peels, the technological process is as follows figure 1 shown, including the following steps:

[0041] (1) Grinding: Take 500g of fresh orange peel, whose moisture content on a wet basis is 82%, and grind it into particles with a particle size of 0.5mm-2mm.

[0042] (2) Subcritical water extraction: Place the orange peel particles obtained in step (1) in a stainless steel extraction kettle, add 1L of distilled water, fill with nitrogen, deflate for 5 minutes, and use subcritical water as the extraction solvent to extract the orange peel particles. Dynamic subcritical extraction, the extraction time is 10min, the subcritical pressure of the stainless steel extraction kettle is 8MPa, the temperature is 130°C, the stirring speed is 100rpm, and the extraction is cooled.

[0043] (3) Centrifugation: Centrifuge the slag liquid cooled in step (2) at room temperature at 4000×g for 10 min, and collect the supernatant.

...

Embodiment 2

[0050] A method for extracting pectin and polyphenols in citrus peels, the technological process is as follows figure 1 shown, including the following steps:

[0051] (1) Pulverization: take 100 g of navel orange peels dried at 105° C., and pulverize them into particles with a particle size of 0.03 mm to 0.3 mm to obtain orange peel powder.

[0052] (2) Subcritical water extraction: Put the orange peel powder obtained in step (1) in a stainless steel extraction kettle, add 1.2L of distilled water, fill with nitrogen, deflate for 5 minutes, and use subcritical water as the extraction solvent to extract the orange peel powder. Dynamic subcritical extraction is carried out, the extraction time is 8min, the subcritical pressure of the stainless steel extraction kettle is 9MPa, the temperature is 150°C, the stirring speed is 150rpm, and cooling is performed after extraction.

[0053] (3) Centrifugation: centrifuge the cooled slag liquid in step (2) at room temperature at 5000×g fo...

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Abstract

The invention discloses an extraction method of pectin and polyphenol in orange peel. The extraction method comprises the following steps: with subcritical water as an extraction solvent, extracting the orange peel and then centrifuging; performing ultrafiltration separation of the obtained supernate to obtain a concentrate and a filtrate; performing alcohol precipitation of the concentrate to obtain orange pectin; and performing adsorption and elution of the filtrate to obtain orange polyphenol. By adopting the extraction method disclosed by the invention, the orange pectin and polyphenol can be extracted at the same time, the extraction time is short, the extraction efficiency is high, the gel property and rheological property of pectin and the active substances of polyphenol can be maintained, the yield of orange pectin and polyphenol is increased to the greatest degree, and the extraction method is environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of deep processing of agricultural products, and relates to a method for extracting pectin and polyphenols from citrus peels, in particular to a method for simultaneously extracting and preparing pectin and polyphenols from citrus peel residues based on subcritical water technology. Background technique [0002] Citrus pomace is an important by-product of citrus processing, accounting for about 20% to 45% of citrus fruit. In 2014, the total output of citrus in my country was 34.942 million tons, and more than 7 million tons of citrus peels were produced every year. It is a renewable resource with a large amount and a wide range. At present, except for a small amount of animal feed and deep processing, most of the dregs are buried or incinerated as waste, which not only causes waste of resources, but also seriously pollutes the environment. Pectin and polyphenols are important functional components in citrus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/06A61K36/752A61P35/00A61P3/10A61P9/00
CPCA61K36/752A61K2236/331A61K2236/37A61K2236/53C08B37/0003C08B37/0045
Inventor 单杨李高阳丁胜华刘伟付复华苏东林
Owner HUNAN AGRI PRODS PROCESSING INST
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