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Method for combined extraction of D-limonene, flavonoid and pectin from orange peel

A technology of d-limonene and combined extraction, applied in chemical instruments and methods, purification/separation of hydrocarbons and hydrocarbons, etc., can solve the problems of inability to achieve combined extraction, waste of natural resources, low utilization efficiency of citrus peels, and the like, Achieve better quality, reduced labor costs, and whiter color

Active Publication Date: 2013-09-18
ZHEJIANG CITRUS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And none of the above methods can realize the combined extraction of these three components, and there are shortcomings such as low efficiency of citrus peel utilization and waste of natural resources.

Method used

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  • Method for combined extraction of D-limonene, flavonoid and pectin from orange peel

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 100g of fresh sweet orange peel, cut into thin strips with a width of 0.5cm, add 1000ml of 95% ethanol solution, and soak in a sealed container for 8h. Use a roller press to perform 2 squeezes, and collect the broken skin residue and squeeze liquid respectively.

[0030] Add 1000ml of tap water to the broken skin and rinse 3 times, drain the water and then add 500ml of tap water, rinse with H 2 S 2 o 4 Adjust the pH to about 2.0, heat to 90°C for 30 minutes, and filter. Add an equal volume of 95% ethanol solution to the filtrate, ethanol precipitation for 1 h, filter through 150 mesh, and dry at 45°C to obtain 5.6 g of pectin (finished product).

[0031] Filter the squeeze liquid to remove debris, concentrate it to about 120ml with a rotary evaporator at a vacuum degree of -0.06MPa, and a temperature of 65°C. After standing for 2 hours, separate it with a disc centrifuge at 6000rpm, collect the oil phase, and obtain dextrorotary Limonene (crude product) 1.1ml....

Embodiment 2

[0034] Weigh 100g of fresh mandarin orange peel, cut into thin strips with a width of 0.5cm, add 1000ml of 95% ethanol solution, and soak in a sealed container for 8h. Use a roller press to perform 2 squeezes, and collect the broken skin residue and squeeze liquid respectively.

[0035] Add 1000ml of tap water to the broken skin and rinse 3 times, drain the water and then add 500ml of tap water, rinse with H 2 S 2 o 4 Adjust the pH to about 2.0, heat to 90°C for 30 minutes, and filter. Add an equal volume of 95% ethanol solution to the filtrate, ethanol precipitation for 1 h, filter through 150 mesh, and dry at 45°C to obtain 4.7 g of pectin (finished product).

[0036] Filter the squeeze liquid to remove debris, concentrate it to about 150ml with a rotary evaporator at a vacuum degree of -0.06MPa, and a temperature of 65°C. After standing for 2 hours, separate it with a disc centrifuge at 6000rpm, collect the oil phase, and obtain dextrorotary Limonene (crude product) 1.3...

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Abstract

The invention provides a method for combined extraction of D-limonene, flavonoid and pectin from an orange peel. The method comprises the steps of: immersing a fresh orange peel into ethanol solution after cutting up, carrying out extruding and crushing by a roller presser after carrying out sealed digestion at normal temperature; collecting spetch residue and extrusion liquid respectively; feeding the spetch residue into running water to wash; removing residual ethanol for preparing the pectin; carrying out vacuum distillation on the obtained extrusion liquid to recover ethanol; carrying out standing on the obtained residual liquid to separate by a disc centrifuge machine, wherein an oil phase is a crude product of D-limonene, and a water phase is used for preparing the flavonoid; adding the rinsed spetch residue to running water; adjusting pH to about 2.0; heating and carrying out heat preservation; filtering, and adding the obtained filtrate to isometric ethanol solution; filtering, baking and crushing to obtain the pectin; carrying out vacuum concentration on the obtained water phase to 1 / 5 to 1 / 3 of the original volume by the centrifuge machine; and putting the concentrated water phase into a constant-temperature water bath at 60 DEG C to evaporate into extract, so as to obtain a flavonoid crude product. By adopting the method, extraction and separation of three ingredients of the flavonoid, the D-limonene and the pectin can be achieved under the premise of not destroying the pectin ingredient; the yield and the quality are not affected.

Description

technical field [0001] The invention relates to a plant processing method, in particular to a method for extracting D-limonene, flavonoids and pectin from citrus peels. Background technique [0002] Citrus peel accounts for about 20% of the whole fruit weight, and is rich in natural ingredients such as pectin, essential oil and flavonoids. Our country produces 20 million tons of citrus every year, and if a large amount of citrus peels can be comprehensively utilized, it can not only generate high economic value, but also avoid environmental pollution. [0003] About 52.2-96.2% of citrus peel essential oil is D-limonene, which is an important natural solvent, which can not only effectively remove various oil stains, but also replace toxic industrial solvents such as benzene and toluene , and has an excellent inhibitory effect on bacteria, and has no toxicity to the human body, and can be widely used in daily chemical, food, pharmaceutical and other industries. [0004] Citr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/21C07C7/00C07D311/30C07D311/40C08B37/06
Inventor 曹雪丹方修贵赵凯
Owner ZHEJIANG CITRUS RES INST
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