Method for extracting multifunctional active biological polyphenol from waste wood fiber, and application of multifunctional active biological polyphenol

A technology for lignocellulosic and lignocellulosic raw materials, which is applied in the directions of lignin derivatives, botanical equipment and methods, and chemicals for biological control, etc. problems, to achieve the effect of widening high-value applications, wide distribution of raw materials, and strong functionality

Pending Publication Date: 2022-01-04
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although there are a large number of methods for extracting plant polyphenol active substances, the above-mentioned patents still have the following problems: (1) relying on high-value biomass raw materials, the extracted raw materials themselves are economic crops, and have economic value. The breadth is relatively limited; (2) The extraction process does not conform to the concept of "green chemistry"
Both alkali-dissolution and acetone extraction methods have waste water discharge and organic solvent loss, and have potential impact on the biological safety of natural plant polyphenols; (3) The process is complex, represented by patents on the method of extracting plant polyphenols assisted by ultrasound and microwaves Ultrasonic and microwave-assisted, high-pressure inert gas protection dissolution method is more cumbersome, requires high equipment, consumes a lot of energy, and its extraction cost is relatively high

Method used

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  • Method for extracting multifunctional active biological polyphenol from waste wood fiber, and application of multifunctional active biological polyphenol
  • Method for extracting multifunctional active biological polyphenol from waste wood fiber, and application of multifunctional active biological polyphenol
  • Method for extracting multifunctional active biological polyphenol from waste wood fiber, and application of multifunctional active biological polyphenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Prepare the green extraction solution: configure the choline chloride-oxalic acid solution according to the molar ratio of 1:1, add 1wt% JGF penetrant and 1.5wt% FeCl catalyst to it, and mechanically stir at 100°C 1h, configure A solution;

[0034] 2) Dissolving biomass polyphenols: put lignocellulosic raw materials in solution A at a bath ratio of 10:1 (wood fiber: solution A, w / w), and dissolve at 100° C. for 8 hours. Then add ethanol solution (ethanol: A solution, w / w) in a ratio of 1:1 and shake fully, and filter through a 200-mesh polyester filter cloth to obtain the filtrate, which is B solution;

[0035] 3) Purification of biomass polyphenols: add pure water (pure water: B solution, v / v) to the B solution according to the volume ratio of 4:1, and let it stand for 24 hours until the biomass polyphenols are completely precipitated, and pass through the filtration method A precipitated solid was obtained. The obtained precipitated solid was shaken and washed wi...

Embodiment 2-5

[0036] Embodiment 2-5: oxalic acid in embodiment 1 is replaced with any one in citric acid, lactic acid, phytic acid, glycine and malic acid, and other conditions are the same as embodiment 1.

[0037] See Table 1 for the results of the extraction efficiency of biomass polyphenols in the process conditions of Examples 2-5.

[0038] Table 1 Effect of different organic acid systems on the extraction performance of biomass polyphenols

[0039]

[0040]

[0041] From the results in Table 1, it can be seen that the organic acid systems have a certain dissolution efficiency for biomass polyphenols. Since there are differences in performance indicators such as viscosity and acidity of the extracts compounded with different organic acids, their effects on biomass polyphenols are different. The extraction efficiency of polyphenols is different. Among them, the extraction system represented by lactic acid and oxalic acid has higher comprehensive performance, and the extracted biom...

Embodiment 6-10

[0042] Embodiment 6-10: FeCl in embodiment 1 3 Catalyst is changed into zinc chloride, zinc oxide, cupric chloride, aluminum chloride, cobalt oxide, and all the other conditions are with embodiment 1.

[0043] See Table 2 for the results of catalyst types on the extraction efficiency of biomass polyphenols in Examples 6-10.

[0044] Table 2 Effect of different catalysts on the extraction performance of biomass polyphenols

[0045]

[0046] It can be seen from Table 2 that the type of catalyst has an important influence on the performance of the extracted biomass polyphenols, which is specifically reflected in the large difference in the content of phenolic hydroxyl groups in the product, among which zinc chloride is the best, and the biomass extracted by different catalysts is more Phenols had little effect on the relative purity of the product.

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Abstract

The invention provides a method for extracting multifunctional active biological polyphenol from waste wood fiber, and application of the multifunctional active biological polyphenol.The method comprises the following steps: 1) preparing a green extraction solution: mixing choline chloride, polybasic organic acid, a penetrant and a catalyst, and stirring for at least 1 hour to obtain a solution A; 2) dissolving biomass polyphenol: putting the wood fiber raw material into the solution A, fully dissolving, then adding an ethanol solution and fully oscillating, and then filtering to obtain a filtrate, namely a solution B; and 3) purifying the biomass polyphenol: adding pure water into the solution B, and standing for at least 24 hours until the biomass polyphenol is completely separated out, so as to obtain a separated solid and a residual solution which is a solution C; and carrying out oscillation washing on the precipitated solid with ultrapure water, fully drying at 60 DEG C, then grinding to obtain the solid biomass polyphenol active substance, and filtering the solution C for recycling. The biomass polyphenol extracted by the method is high in purity and strong in activity, and integrates antibacterial, anti-oxidation and anti-ultraviolet properties.

Description

technical field [0001] The invention belongs to the technical field of biological polyphenol extraction, in particular to a method and application for extracting multifunctional active biological polyphenols from waste wood fibers. Background technique [0002] Phenolic substances are widely used and are necessary intermediates for the synthesis of fine chemical products such as pesticides, antioxidants, photosensitive materials and spices. At the same time, due to their special polyphenolic hydroxyl structure, phenolic substances can effectively achieve antibacterial and antioxidative properties. However, the synthesis of polyphenols has the characteristics of high cost and poor biological safety. The extraction of plant polyphenols based on biomass raw materials is considered to be a safer and more effective way to obtain them. [0003] Natural plant polyphenols come from a wide variety of sources, and polyphenols have been extracted from a variety of natural plant tissue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07G1/00C09K15/34A01N61/00A01P1/00A01P3/00
CPCC07G1/00C09K15/34A01N61/00
Inventor 刘琳王邓峰姚菊明沈荣盛
Owner ZHEJIANG SCI-TECH UNIV
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