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Method for extracting acacia melanoxylon tannin extract by ultrasonic-assisted biological enzyme method

A bio-enzymatic, ultrasonic-assisted technology, applied in chemical instruments and methods, natural resin technology, natural resin refining, etc., to achieve the effect of expanding the supply chain of raw materials, low color value, and increasing content

Active Publication Date: 2020-12-04
广西灵水林化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bark of Acacia ebony is rich in tannin, and it is also a good raw material tree species for tannins. However, there is no research report on the use of tannins from the bark of Acacia ebony. It will make up for the current situation that the supply of the tannin extract market is in short supply, and promote the development of the Acacia blackwood industry, which is of great significance to the development of my country's agricultural and forestry economy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for ultrasonically assisted bio-enzymatic extraction of acacia extract, comprising the steps of:

[0028] (1) Wash the bark of Acacia acacia with water, dry it in the sun, and crush it to 100 meshes to obtain Acacia acacia bark powder (with a tannin content of 32.7%);

[0029] (2) Take 100kg of Acacia blackwood bark powder and put it into the ultrasonic countercurrent extraction equipment, then add water 10 times the weight of the bark powder, adjust the pH to 5.5 with citric acid, and then add cellulose with a mass ratio of 3:2:1 Enzyme, pectinase and xylanase, the addition amount of which is 1.2% of the mass of Acacia acacia bark powder, ultrasonic countercurrent extraction at a temperature of 60°C for 1.5h, heating up to 70°C, ultrasonic countercurrent extraction for 1.0h, and then Raise the temperature to 85°C, perform ultrasonic countercurrent extraction for 1.0 h, and filter to obtain an extract containing tannin extract;

[0030] (3) Add 8g of EDTA, 45g...

Embodiment 2

[0034] A method for ultrasonically assisted bio-enzymatic extraction of acacia extract, comprising the steps of:

[0035] (1) Wash the bark of Acacia acacia with water, dry it in the sun, and crush it to 100 meshes to obtain Acacia acacia bark powder (with a tannin content of 32.7%);

[0036] (2) Take 100kg of Acacia blackwood bark powder and put it into the ultrasonic countercurrent extraction equipment, then add water 12 times the weight of the bark powder, adjust the pH to 5.0 with acetic acid, and then add cellulase with a mass ratio of 2:1:1 , pectinase and xylanase, the addition of which is 1.0% of the mass of Acacia blackwood bark powder, ultrasonic countercurrent extraction at a temperature of 60°C for 2h, heating up to 75°C, ultrasonic countercurrent extraction for 1.5h, and then heating to 80°C, ultrasonic countercurrent extraction for 0.5h, filtered to obtain the extract;

[0037] (3) Add 10g of EDTA, 40g of attapulgite and 4g of oxalic acid to each liter of the ex...

Embodiment 3

[0041] A method for ultrasonically assisted bio-enzymatic extraction of acacia extract, comprising the steps of:

[0042](1) Wash the bark of Acacia acacia with water, dry it in the sun, and crush it to 100 meshes to obtain Acacia acacia bark powder (the content of tannin is 35.2%);

[0043] (2) Take 100kg of Acacia acacia bark powder and put it into the ultrasonic countercurrent extraction equipment, then add water 9 times the weight of the bark powder, adjust the pH to 4.5 with phosphoric acid, and then add cellulase with a mass ratio of 3:1:1 , pectinase and xylanase, the addition of which is 0.8% of the mass of Acacia blackwood bark powder, ultrasonic countercurrent extraction at a temperature of 50°C for 2h, heating up to 70°C, ultrasonic countercurrent extraction for 1.5h, and then heating to 85°C, ultrasonic countercurrent extraction for 1 hour, and filter to obtain the extract;

[0044] (3) Add 8g of EDTA, 50g of attapulgite and 3g of oxalic acid to each liter of the ...

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Abstract

The invention discloses a method for extracting acacia melanoxylon tannin extract by an ultrasonic-assisted biological enzyme method, wherein the method comprises the steps: putting acacia melanoxylontannin extract powder into ultrasonic countercurrent extraction equipment, adding water, regulating the pH value to 4.5-5.5 with weak acid, adding a biological enzyme, carrying out ultrasonic countercurrent extraction, and filtering to obtain a leaching solution; adding EDTA, attapulgite and oxalic acid into the leaching solution, standing, filtering, removing precipitates, and concentrating under reduced pressure to obtain a tannin extract concentrated solution; and adding a sulfonating agent, glyceryl stearate sulfate sodium salt and sodium dodecyl sulfate into the tannin extract concentrated solution for modification, adjusting the pH to 6-7 by using sodium tripolyphosphate, and carrying out spray drying to obtain the acacia melanoxylon tannin extract with high tannin content. According to the method disclosed by the invention, the tannin extract is extracted from acacia melanoxylon bark, a raw material supply chain of the tannin extract is expanded, the extracted tannin extract has the advantages of low color value, high tannin content, high tannin extract yield and the like, and the method is simple in process, relatively low in cost, high in production efficiency and good inmarket prospect.

Description

technical field [0001] The invention relates to the technical field of extracting tannin extract, in particular to a method for extracting acacia tannin extract by ultrasonic-assisted biological enzymatic method. Background technique [0002] Tannin extract is a chemical product obtained by processing tannin-rich plant raw materials through water extraction and concentration. Usually tan to tan, powdery or lumpy. In addition to the main component of tannin, the composition of tannin also includes non-tannin and insoluble matter. Tannins are divided into hydrolyzed tannins and condensed tannins, which are mainly used for tanning leather and are called vegetable tanning agents in the leather industry. In addition, it is also used as oil drilling mud thinner and plugging agent, industrial gas wet desulfurization agent, boiler descaling and antiscaling agent; mineral processing inhibitor, water purification treatment agent, battery cathode additive, metal corrosion inhibitor, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/00C09F1/02
CPCC09F1/00C09F1/02
Inventor 苏宏伟黄仁整梁发星李康黄益辉何日柳郭日朋
Owner 广西灵水林化有限公司
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