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A method for extracting low methoxyl pectin from apple pomace

A technology of low-methoxyl pectin and apple pomace, applied in the field of pectin extraction, to achieve the effects of cost saving, extraction rate improvement, and excellent quality

Inactive Publication Date: 2016-06-01
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to solve the deficiencies of the above-mentioned technical problems, and provide a method for extracting low-methoxyl pectin from apple pomace, which has a simple process and solves the need to dissolve and lower the lipid content of the finished pectin in the existing traditional process. The complex process of re-precipitation and drying, the raw material reagents used in the production are common reagents, convenient and cheap to buy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for extracting low methoxyl pectin from apple pomace, the specific extraction steps are:

[0022] Step 1. According to the ratio of water to apple pomace mass ratio of 1:2, add 30℃ water to the apple pomace to wash twice; then add 35℃ water to the washed apple pomace and mix it evenly, with 380W Power microwave treatment for 10 minutes; then filter, place the filtered apple pomace under microwave power of 500W for microwave drying for 10 minutes, then dry at 60°C for 2 hours, take it out and cool to room temperature and smash to 50 mesh to obtain apple pomace powder for use;

[0023] Step 2. Mix the pulverized apple pomace powder and the hydrochloric acid solution with a pH value of 2 in a mass ratio of 1:20. The resulting mixture is microwave-treated at 480W power for 20 minutes, and then centrifuged to obtain the supernatant; The supernatant was heated to 60°C and concentrated for 2 hours to obtain a concentrated solution for use;

[0024] Step 3. Pour the concentr...

Embodiment 2

[0027] A method for extracting low methoxyl pectin from apple pomace, the specific extraction steps are:

[0028] Step 1. According to the ratio of water to apple pomace mass ratio of 1:2, add 40℃ water to the apple pomace to wash 3 times; then add 40℃ water to the washed apple pomace and mix it evenly. Power microwave treatment for 30 minutes; then filter, place the filtered apple pomace under a microwave power of 500W for microwave drying for 20 minutes, then dry at 70°C for 2-3 hours, take it out and cool to room temperature and smash to 60 mesh to obtain apple pomace powder. spare;

[0029] Step 2. Mix the pulverized apple pomace powder and the hydrochloric acid solution with a pH value of 3 in a mass ratio of 1:20. The resulting mixture is microwave-treated with a power of 500W for 40 minutes, and then centrifuged to collect the supernatant; The supernatant was heated to 60°C and concentrated for 2 hours to obtain a concentrated solution for use;

[0030] Step 3. Pour the conc...

Embodiment 3

[0033] A method for extracting low methoxyl pectin from apple pomace, the specific extraction steps are:

[0034] Step 1. According to the mass ratio of water to apple pomace of 1:2, add 35℃ water to the apple pomace and wash it 3 times; then add 39℃ water to the washed apple pomace and mix it evenly. Power microwave treatment for 20 minutes; then filter, place the filtered apple pomace under microwave power of 500W for microwave drying for 15 minutes, then dry at 65°C for 2.5 hours, take it out and cool to room temperature and smash to 55 mesh to obtain apple pomace powder for use ;

[0035] Step 2. Mix the pulverized apple pomace powder with a sulfuric acid solution with a pH of 2.5 at a mass ratio of 1:20. The resulting mixture is microwave-treated with a power of 490W for 30 minutes, and then centrifuged to obtain the supernatant; The supernatant was heated to 60°C and concentrated for 2 hours to obtain a concentrated solution for use;

[0036] Step 3. Pour the concentrated liq...

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Abstract

A method of extracting low methoxy-based fruit glue from an apple residue is that after washing the apple dregs with a 30-40 ° C water, 380-500W power microwave processing is filtered;After drying and powder, get apple slag powder; after mixing the apple slab powder and acid water, it is treated with 480-500W power microwave;Pillar, charge the filter liquid; after heating to 5-10 ° C, add an alkaline solution to adjust the pH value; in the obtained pectin concentration liquid, the pH value of the acid water addedEthanol aquatic solution, mixing, static, and the sedimentation of the glycol water solution was washed 7-8 times with ethanol aquatic solution; the substance obtained after the precipitation of the vacuum and drying after washing is a low-oxygen-based fruit glue.The invention process is simple and simple. The required additives are commonly used reagents, which are low in cost and easy to buy; the extraction rate reaches 7.9%-9.4%;%.

Description

technical field [0001] The invention relates to a method for extracting pectin, in particular to a method for extracting low-methoxyl pectin from apple pomace. Background technique [0002] Apple pomace is the main waste in fruit juice production, accounting for 20% to 25% of the processing volume, and the pectin content in apple pomace is rich, about 15%. Pectin is a natural food additive. It can not only be used as a stabilizer, emulsifier and thickener, but also has the effect of lowering blood sugar, blood fat and cholesterol. Therefore, it is of great significance to the development of pectin production methods. According to the proportion of galacturonic acid methyl esterification in its molecular chain, pectin can be divided into low methoxyl pectin (esterification degree less than 50%) and high methoxyl pectin (esterification degree greater than 50%) . Among them, high methoxyl pectin has outstanding thickening and gelling effects, and is widely used in food, medic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/06
Inventor 朱文学曲昊杨吴建业熊瑞张棋樊金玲罗磊张晓宇向进乐孙晓菲
Owner HENAN UNIV OF SCI & TECH
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