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Production method of high-ester pectin by intermittent acid extraction and ethanol precipiration

A high-ester pectin and ethanol precipitation technology is applied in the production field of intermittent acid extraction and ethanol precipitation of high-ester pectin, can solve the problems of difficult separation of aluminum salt precipitated particles, low yield and the like, achieves good color and luster and simple production process , the effect of high purity

Inactive Publication Date: 2012-08-22
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method of extracting high-ester pectin is low yield of acid extraction and salting out method, which is only about 7%, and the precipitated particles of aluminum salt are small and difficult to separate, and the color of high-valent iron salt is dark, so it needs to be decolorized.

Method used

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  • Production method of high-ester pectin by intermittent acid extraction and ethanol precipiration
  • Production method of high-ester pectin by intermittent acid extraction and ethanol precipiration
  • Production method of high-ester pectin by intermittent acid extraction and ethanol precipiration

Examples

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Embodiment 1

[0041] A kind of production method of the high-ester pectin of intermittent acid extraction ethanol precipitation, comprises the following steps:

[0042] (1), pretreatment of orange peel

[0043] Weigh 5 parts of dried orange peel, 20g each, soak in warm water at 45°C for about 30 minutes, make it fully absorb water and soften, remove soluble impurities, drain the orange peel and boil in boiling water for 10 minutes to inactivate the enzyme. The final orange peel is placed in running water and rinsed to colorless, and then is pulverized into orange peel particles with a particle diameter of 1-5mm with a pulverizer;

[0044] (2), acid hydrolysis

[0045] Take the pulverized orange peel particles in step (1) respectively, and calculate according to the mass ratio of the orange peel particles to water, that is, mix the orange peel particles: water at a ratio of 1:20, and then adjust the pH value to 1.5 with a hydrochloric acid solution with a concentration of 5mol / L. , Control...

Embodiment 2

[0050] A kind of production method of the high-ester pectin of intermittent acid extraction ethanol precipitation, comprises the following steps:

[0051] (1), pretreatment of orange peel

[0052] Weigh 5 parts of dried orange peel, 20g each, soak in warm water at 45°C for about 30 minutes, make it fully absorb water and soften, remove soluble impurities, drain the orange peel and boil in boiling water for 10 minutes to inactivate the enzyme. The final orange peel is placed in running water and rinsed to colorless, and then is pulverized into orange peel particles with a particle diameter of 1-5mm with a pulverizer;

[0053] (2), acid hydrolysis

[0054]Take the orange peel particles with a particle size of 1-5mm obtained in step (1) respectively, and calculate according to the mass ratio of the orange peel particles to water, that is, the orange peel particles: water are mixed at a ratio of 1:20 and then mixed with hydrochloric acid with a concentration of 5mol / L Adjust the...

Embodiment 3

[0059] A kind of production method of the high-ester pectin of intermittent acid extraction ethanol precipitation, comprises the following steps:

[0060] (1), pretreatment of orange peel

[0061] Weigh 5 parts of dried orange peel, 20g each, soak in warm water at 45°C for about 30 minutes, make it fully absorb water and soften, remove soluble impurities, drain the orange peel and boil in boiling water for 10 minutes to inactivate the enzyme. The final orange peel is placed in running water and rinsed to colorless, and then is pulverized into orange peel particles with a particle diameter of 1-5mm with a pulverizer;

[0062] (2), acid hydrolysis

[0063] Take 5 parts of orange peel particles with a particle size of 1-5mm obtained in step (1) respectively, and calculate according to the mass ratio of them to water, that is, orange peel particles: water are 1:5, 1:10, 1:15 respectively , 1:20, and 1:25 were mixed, and the pH value was adjusted to 1.5 with a hydrochloric acid s...

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Abstract

The invention discloses a production method of high-ester pectin by intermittent acid extraction and ethanol precipiration, which comprises the following steps: soaking dried orange peel in 45 DEG C warm water for 30 minutes until the dried orange peel absorbs sufficient water and is softened to remove soluble impurities; draining the orange peel, putting the orange peel in boiling water to inactivate enzymes, rinsing the orange peel subjected to enzyme inactivation in running water to no color, and pulverizing with a pulverizer; extracting the pulverized orange peel particles and water in a mass ratio of 1:(5-20) at 50-90 DEG C for 30-90 minutes while controlling the pH value within 1.0-3.0, and filtering; carrying out vacuum rotary evaporation on the filtrate; adding anhydrous ethanol into the concentrated solution, precipitating and carrying out vacuum filtration to obtain a filter cake; and drying the filter cake at 40 DEG C to obtain the high-ester pectin. The high-ester pectin obtained by the production method disclosed by the invention has better gelation properties than the commercially available high-ester pectin produced in China. The high-ester pectin appears as a pseudoplastic fluid when the solution concentration is high.

Description

Technical field [0001] The present invention involves an intermittent acid extraction of high -ester pectin production methods for extracting ethanol. Background technique [0002] Points are a completely non -toxic natural food additive. It is a recognized and safe food additive that is recommended by the FAO / WHO Food Additives Joint Committee GMP (Good Manufacturing Practice).Because pectin has excellent gel properties and emulsification stability, it has become an important additive in the food industry.The latest research shows that pectin as a soluble dietary fiber has the effects of anti -diarrhea, anti -cancer, and treatment of diabetes, and its application scope is expanding.In addition, pectin has significant effects in various reaction mechanisms and metabolic pathways, which also makes pectin an indispensable auxiliary raw material in some drugs and health products and cosmetics. [0003] Since the price of imported pectin in my country is much higher than domestic p...

Claims

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Application Information

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IPC IPC(8): C08B37/06
Inventor 田怀香窦银花张晓希
Owner SHANGHAI INST OF TECH