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Method for preparing pectin by taking peel residue as raw material

A technology of fruit peel residue and pectin, which is applied in the production of bulk chemicals, etc., and can solve the problems of energy consumption, time consumption and large water consumption

Active Publication Date: 2010-11-17
广州市莱檬生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the water consumption of the two steps of water washing and acid water extraction is very large, these existing preparation methods consume energy and time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 150 grams of dried orange peel, crush it to 1-3mm, add 3000ml of water, the water temperature is 60°C, stir evenly, let it stand for 30 minutes, transfer the mixed material to an ultra-high pressure equipment, increase the pressure to 100MPa, and keep the pressure 3 minutes, release pressure. The mixed material is filtered, and the filter residue is added with acid water prepared by 2000 ml of nitric acid, the pH is 2.0, and the temperature is 80 °C, then transferred to the ultra-high pressure equipment again, boosted to 100 MPa, kept the pressure for 3 minutes, released the pressure, continued to keep warm for 15 minutes, and filtered. The filtrate was concentrated under reduced pressure to about 450 ml, and 600 ml of 95% ethanol was added, stirred evenly, left to stand for 60 minutes, filtered, and the filter residue was taken, dried under reduced pressure, and pulverized to obtain 17.4 grams of pectin.

Embodiment 2

[0020] Weigh 150 grams of dried orange peel, crush it to 1-3 mm, add 3000 ml of water, the water temperature is 45 °C, stir evenly, let it stand for 30 minutes, transfer the mixed material to an ultra-high pressure equipment, increase the pressure to 200 MPa, and keep the pressure 5 minutes, release pressure. The mixed material is filtered, and the filter residue is added with acid water prepared by 2250 ml of nitric acid, the pH is 2.0, and the temperature is 70°C, then transferred to the ultra-high pressure equipment again, boosted to 200MPa, kept the pressure for 5 minutes, released the pressure, continued to keep warm for 10 minutes, and filtered, The filtrate was concentrated under reduced pressure to about 450 ml, 600 ml of 95% ethanol was added, stirred evenly, left to stand for 60 minutes, filtered, the filter residue was taken, dried under reduced pressure, crushed to obtain 17.0 g of pectin.

Embodiment 3

[0022] Weigh 150 grams of dried orange peel, crush it to 1-3 mm, add 3000 ml of water, keep the water temperature at room temperature, stir evenly, and let it stand for 30 minutes. Minutes, release pressure. The mixed material is filtered, and the filter residue is added with acid water prepared by 2700 ml of nitric acid, the pH is 2.0, and the temperature is 60 °C, then transferred to the ultra-high pressure equipment again, boosted to 400 MPa, kept the pressure for 10 minutes, released the pressure, continued to keep warm for 20 minutes, and filtered. The filtrate was concentrated under reduced pressure to about 450 ml, 600 ml of 95% ethanol was added, stirred evenly, left to stand for 60 minutes, filtered, the filter residue was taken, dried under reduced pressure, and pulverized to obtain 17.1 g of pectin.

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Abstract

The invention discloses a method for preparing pectin by taking peel residue as a raw material, and relates to the technical field of pectin preparation. The technical problems to be solved are that: in the prior art of the pectin preparation, a washing step and an acid water extraction step have the characteristics of high temperature, long time, energy consumption and time consumption. In the method, by adopting fast ultrahigh pressure treatment in the washing step and the acid water extraction step at a low temperature, washing and acid water extraction effects are ensured, and simultaneously a material temperature and an operation time are greatly reduced. A fat-soluble component also can be extracted from a peel residue raw material by using supercritical carbon oxide before washing, so that a fat-soluble byproduct and a pectin product with higher purity are obtained.

Description

technical field [0001] The invention relates to a method for preparing pectin, in particular to a method for preparing pectin by using peel residues as raw materials. Background technique [0002] The method of extracting pectin with peel residue as raw material has many literature reports, as: " a kind of method of utilizing peel to produce pectin " that application number is 200610052327.9, application number is " the extraction of pectin in citrus fruit peel and Preparation process", application number 200510124554.3 "decolorization of apple pectin and process for producing white fine powder apple pectin", application number 01101494.6 "production method of pectin" and application number 94116245.1 "lemon peel fruit Gum Extraction Method". The preparation methods reported in these documents basically include the following steps: crushing of raw materials, washing with water, extraction with acid water, separation of slag, concentration, precipitation, separation of slag ...

Claims

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Application Information

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IPC IPC(8): C08B37/06
CPCY02P20/54
Inventor 赵大洲
Owner 广州市莱檬生物科技有限公司
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