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Method for extracting natural preservative from bamboo leaves

A technology of natural preservatives and bamboo leaves, which is applied in the field of extracting active natural preservatives from bamboo leaves to achieve the effect of high extraction efficiency and low cost

Active Publication Date: 2010-09-15
浙江圣氏生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, a continuous complete set of extraction process is adopted to continuously extract the effective active ingredients contained in bamboo leaves, including flavonoids, phenolic acids, bioactive polysaccharides, etc., and obtain natural compound (containing flavonoids, phenolic compounds, etc.) Acid compounds, biologically active polysaccharides, etc.) research on preservatives, there is no report at home and abroad

Method used

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  • Method for extracting natural preservative from bamboo leaves
  • Method for extracting natural preservative from bamboo leaves
  • Method for extracting natural preservative from bamboo leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] By the technological process shown in Fig. 1, the method for extracting natural antiseptic from bamboo leaf, comprises the following steps:

[0042] 1) Collect fresh bamboo leaves, wash and dry them for later use;

[0043] 2) Put 300kg of bamboo leaves into an extraction tank, add 30000ml of ethanol with a volume fraction of 60%, heat to 60°C, and assist 0.5 hours with ultrasonic waves with a frequency of 50KHz, then extract for 1.5 hours to make the active ingredients in the bamboo leaves fully Dissolve in ethanol solution, filter out the solution for later use;

[0044] 3) passing the above solution through a microporous filter device with a filtration accuracy of 0.5 μm to remove large particles of impurities to obtain a clarified filtrate;

[0045] 4) The above-mentioned filtrate is processed through a 2.5-inch tubular nanofiltration membrane module system made of polyamide, with a molecular weight cut-off of 300Da, an operating temperature below 30°C, a pressure o...

Embodiment 2

[0051] By the technological process shown in Fig. 1, the method for extracting natural antiseptic from bamboo leaf, comprises the following steps:

[0052] 1) Collect fresh bamboo leaves, wash and dry them for later use;

[0053] 2) Put 300kg of bamboo leaves into the extraction tank, add 21000ml of ethanol with a volume fraction of 60%, heat to 60°C, and use ultrasonic waves with a frequency of 100KHz for 0.75 hours, then extract for 2.0 hours, so that the active ingredients in the bamboo leaves are fully Dissolve in ethanol solution, filter out the solution for later use;

[0054] 3) passing the above solution through a microporous filter device with a filtration accuracy of 0.5 μm to remove large particles of impurities to obtain a clarified filtrate;

[0055] 4) The above-mentioned filtrate is treated by a 2.5-inch tubular nanofiltration membrane module system made of polyamide, with a molecular weight cut-off of 400Da, an operating temperature below 30°C, a pressure of 0...

Embodiment 3

[0061] By the technological process shown in Fig. 1, the method for extracting natural antiseptic from bamboo leaf, comprises the following steps:

[0062] 1) Collect fresh bamboo leaves, wash and dry them for later use;

[0063] 2) Put 300kg of bamboo leaves into the extraction tank, add 24000ml of ethanol with a volume fraction of 60%, heat to 60°C, and assisted with ultrasonic waves with a frequency of 120KHz for 1 hour, then extract for 0.75 hours to make the active ingredients in the bamboo leaves fully Dissolve in ethanol solution, filter out the solution for later use;

[0064] 3) passing the above solution through a microporous filter device with a filtration accuracy of 0.5 μm to remove large particles of impurities to obtain a clarified filtrate;

[0065] 4) The above-mentioned filtrate is treated by a 2.5-inch tubular nanofiltration membrane module system made of polyamide, with a molecular weight cut-off of 500Da, an operating temperature below 30°C, a pressure of...

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Abstract

The invention provides a method for extracting and preparing a natural, safe and high-efficiency plant natural preservative by using bamboo leaves as raw materials and integrating an ultrasonic auxiliary extraction technology, a membrane separation technology, a composite solvent continuous countercurrent extraction technology, a vacuum concentration technology, and the like. The preservative can be widely applied to fruits, vegetables, food, medicines, feed, cosmetics, and the like, and particularly, the preservative has broad antibacterial spectrum and small additive amount and belongs to clarification type preservatives in beverages. After the preservative is added to beverage products, the preservative cannot influence the color, the flavor and the taste of the products, thus the preservative has obvious application advantages.

Description

technical field [0001] The invention relates to a method for extracting natural preservatives from bamboo leaves, in particular to a method for extracting active natural preservatives from bamboo leaves by integrating ultrasonic-assisted extraction technology, membrane separation technology, composite solvent continuous countercurrent extraction technology, and vacuum concentration technology. method. Background technique [0002] It is unthinkable to have no food preservatives. Based on the current annual use of 100,000 tons of chemically synthesized preservatives in our country, an average of 1‰ of additives is used to prevent 100 million tons of food from spoiling and deteriorating every year. Calculated at an average of 3,000 yuan per ton of food, the direct economic value is 300 billion yuan! It can be seen that the current food industry is inseparable from food preservatives, and developed countries are no exception. [0003] In view of the threat of chemically synt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/3472
Inventor 黄俊陈永健刘士旺
Owner 浙江圣氏生物科技有限公司
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