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Comprehensive utilization method for pomelo peels

A technology of pomelo peel and rind is applied in the field of comprehensive utilization of pomelo peel, which can solve the problems of single utilization of pomelo peel and complicated process, and achieve the effect of improving the utilization value.

Inactive Publication Date: 2014-01-01
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned treatment of pomelo peel is either a single use, or the process is complicated, and it cannot be simple, effective, and fully explore all the value of pomelo peel

Method used

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  • Comprehensive utilization method for pomelo peels
  • Comprehensive utilization method for pomelo peels
  • Comprehensive utilization method for pomelo peels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1. Coproduction prepares pomelo peel essential oil, pectin and adsorbent

[0023] (1) After washing the whole pomelo peel, separate the yellow outer skin from the white inner skin, dry the white skin in an oven at 50°C, weigh 117.5g of the yellow skin, and crush it in a grinder for 3 times, 15 seconds each time, Transfer to a three-necked bottle, add 0.5g of sodium chloride, then add deionized water until the solid is submerged by 1-2cm, carry out steam distillation, collect the fractions, and steam for about 3 hours until the steamed gas no longer has the fragrance of pomelo peel , stop the distillation, transfer the fraction to a separatory funnel, extract with anhydrous ether, and carry out rotary evaporation to the upper liquid to obtain 0.6902 g of pomelo peel essential oil, with a yield of 0.587%.

[0024] (2) Suction filter the yellow skin residue in (1), reflux with absolute ethanol to remove the pigment, then dry at 50°C, mix and pulverize with the w...

Embodiment 2

[0027] Embodiment 2. Coproduction prepares pomelo peel essential oil, pectin and adsorbent

[0028] (1) Wash a few pieces of pomelo peel and separate the yellow peel from the white peel. Dry the white peel in an oven at 60°C. The yellow peel weighs 50.3g. Put it in a grinder and grind it for 3 times, each time for 20 seconds, transfer To the three-neck flask, add 0.5g sodium chloride, then add deionized water until the solid is submerged by 1-2cm, carry out steam distillation, collect the fraction, steam for about 4 hours, stop the distillation, transfer the fraction to the separatory funnel, and use Extraction was carried out with anhydrous ether, and the upper liquid was subjected to rotary evaporation to obtain 0.219 g of pomelo peel essential oil, with a yield of 0.435%.

[0029] (2) Suction filter the yellow skin residue in (1), reflux with absolute ethanol to remove the pigment, dry at 60°C, mix and pulverize with the white skin for 3 minutes to obtain a mixed powder, we...

Embodiment 3

[0031] Example 3. Adsorption effect evaluation of residue adsorbent

[0032]Simulate dye waste water with methylene blue solution, take by weighing 0.9961g of 40~80 mesh residue adsorbents prepared in Example 1 in No. 1 conical flask, add 50.0ml of crude methylene blue solution of 1000mg / L, and add to another conical flask ( Add 50.0ml of the same solution to No. 2), place the two bottles in a constant temperature oscillator at 25°C and 150r / min for 24 hours, take them out, absorb the solution and centrifuge, take the supernatant, dilute 200 times and 500 times respectively to measure the absorbance , Determine the concentration from the standard curve, and calculate the concentration of the solution before and after adsorption to be 1073.7mg / L and 221.6mg / L respectively. The removal rate of the methylene blue solution by the residue adsorbent is 79.4%, and the adsorption capacity is 42.8mg / g.

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Abstract

The invention discloses a comprehensive utilization method for pomelo peels, relating to a resource treatment method for agricultural product wastes. The method comprises the steps of separating a pomelo peel into a yellow outer peel and a white inner peel; drying the white inner peel; grinding the yellow outer peel, heating, and collecting fractions to obtain the mixed liquid of essential oil and water; performing extraction and rotary steaming to obtain pomelo-peel essential oil; mixing the yellow outer peel after collecting the fractions with ethanol, refluxing until yellow peel pigments are completely removed, and drying the remaining yellow outer peel; mixing the dried yellow outer peel and the dried white inner peel, and grinding to obtain mixed powder; adding an ethanol aqueous solution into the mixed powder; stirring in an oil bath, performing suction filtration, and washing; adding deionized water, and adjusting the pH value to 1-2; stirring in the oil bath, and performing suction filtration; concentrating the obtained pectin extraction liquid; adding ethanol to separate out pectin to obtain a pectin product; drying the residue after the suction filtration, and grinding; fetching the residue powder; adding the deionized water, and washing to neutrality; performing suction filtration; drying the solid to obtain a residue adsorbent.

Description

technical field [0001] The invention relates to a method for resourceful treatment of agricultural product waste, in particular to a method for comprehensive utilization of pomelo peel. Background technique [0002] Grapefruit peel contains essential oil, pigment, limonin, pectin, fiber and other useful substances, which are usually discarded as garbage, which not only wastes a lot of useful substances, but also causes great pollution to the natural environment. How to turn waste into treasure and recycle agricultural and sideline product waste has become the research direction of scientific researchers in recent years. For example, the research on the extraction and utilization of useful substances of pomelo peel is also on the rise in recent years. For example, Chinese patent CN102864019.A discloses a method for co-producing essential oil and pectin from pomelo peel. First, the pomelo peel is cleaned and cut and then dried , crushed, and then extract the essential oil wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02B01J20/24B01J20/30C08B37/06B09B3/00
Inventor 叶李艺孙乘杰蒋艺斐姜谊平王帅黄焕赵杰张敬苗
Owner XIAMEN UNIV
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