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Method for extracting pectin from citrus peel pomace

A technology of citrus peel and pectin, which is applied in the fields of deep processing of agricultural products and recycling of solid waste, can solve the problems of weak competitiveness in overseas markets, irrational use of resources, and small scale of enterprises, and solve the shortage of pectin resources, Realize the effect of resource utilization and short action time

Active Publication Date: 2016-11-23
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although certain results have been achieved, compared with developed countries, there are still problems such as relatively backward technology, small scale of enterprises, high extraction costs, single finished products, poor quality, irrational use of resources, and weak competitiveness in overseas markets.

Method used

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  • Method for extracting pectin from citrus peel pomace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Adopt the following method to extract pectin from citrus peel, the specific steps are as follows:

[0030] 1) Pretreatment: Take fresh citrus peels, dry them (dry at 70°C, and turn them from time to time, and dry them to a moisture content of about 9%), crush them, and pass them through a 50-mesh sieve for later use. Accurately weigh a certain amount of sample, wrap it with filter paper, and treat it for 5.5 h with absolute ethanol twice soaking method and Soxhlet extraction method respectively, then rinse with hot water at 58°C until the solution is colorless, and drain for later use.

[0031] 2) Decolorization: 95% ethanol was used as the extraction agent, and the volume ratio of solid to liquid was 1:4. The sieved citrus peel dry powder was decolorized for 4.5 h at a temperature of 54 °C.

[0032] 3) Extraction: add a certain amount of citric acid buffer solution to the decolorized raw material, adjust the volume ratio of material to liquid to 1:13, and pH to 4.2, th...

Embodiment 2

[0035] Adopt the following method to extract pectin from citrus peel, the specific steps are as follows:

[0036] 1) Pretreatment: Take fresh citrus peels, dry them (dry at 65°C, and turn them from time to time until the moisture content is about 10%), crush them, and pass them through a 60-mesh sieve for later use. Accurately weigh a certain amount of sample, wrap it with filter paper, and treat it for 6.5 hours by double immersion in absolute ethanol and Soxhlet extraction respectively, then rinse with hot water at 60°C until the solution is colorless, and drain for later use.

[0037] 2) Decolorization: 95% ethanol was used as the extraction agent, and the volume ratio of solid to liquid was 1:4.5. The sieved citrus peel dry powder was decolorized at 52 °C for 5 h.

[0038] 3) Extraction: add a certain amount of citric acid buffer solution to the decolorized raw material, adjust the volume ratio of material to liquid to 1:14, and pH to 4.0, then add 0.7% compound enzyme (ce...

Embodiment 3

[0041] Adopt the following method to extract pectin from citrus peel, the specific steps are as follows:

[0042] 1) Pretreatment: Take fresh citrus peels, dry them (dry at 75°C, and turn them from time to time, and dry them to a moisture content of about 8%), crush them, and pass them through a 60-mesh sieve for later use. Accurately weigh a certain amount of sample, wrap it with filter paper, and treat it with absolute ethanol twice soaking method and Soxhlet extraction method respectively for 6 h, then rinse with hot water at 60°C until the solution is colorless, and drain it for later use.

[0043] 2) Decolorization: 95% ethanol was used as the extraction agent, and the volume ratio of solid to liquid was 1:4.3. The sieved citrus peel dry powder was decolorized at 53°C for 5.5 h.

[0044] 3) Extraction: add a certain amount of citric acid buffer solution to the decolorized raw material, adjust the volume ratio of material to liquid to 1:15, and pH to 4.5, then add 0.65% co...

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Abstract

The invention discloses a method for extracting pectin from citrus peel pomace. The method comprises the following steps: crushing and decolorating citrus peel pomace as a raw material, treating with microwaves under the action of a compound enzyme, deactivating an enzyme by a water bath and centrifugally filtering to obtain a pectin extract, and finally obtaining the pectin by alcohol precipitation. The extraction method provided by the invention is simple, easy to operate and low in cost, and the resource utilization of waste materials is realized.

Description

technical field [0001] The invention belongs to the fields of deep processing of agricultural products and recycling of solid waste, and in particular relates to a method for extracting pectin from citrus peel. Background technique [0002] With the vigorous development of my country's citrus industry, the treatment of citrus peels has gradually become the number one problem for domestic citrus processing enterprises. Generally, more than 50% of citrus peels will be produced after juicing. The country produces more than 5 million tons of peels every year. Except for a very small amount of citrus peels that are used for the processing of preserved fruits such as dried tangerine peels, most of them are directly discarded and buried, causing huge damage. resource waste and environmental pollution. As a renewable resource with a large amount and a wide range, citrus peels have achieved certain results in the development and utilization of them at home and abroad, but domestic r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/06
CPCC08B37/0045
Inventor 周月明任春蓉夏家帅陈猷鹏郭劲松申渝
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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