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A kind of extraction process of phenolic substances in wood vinegar

A technology of phenolic substances and extraction process, which is applied in the field of extraction process of phenolic substances in wood vinegar, can solve the problems such as the inapplicability of the two-phase system, and achieve the effect of increasing the extraction rate and increasing the purity

Inactive Publication Date: 2017-10-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the extraction of phenolic substances from wood vinegar, in order to obtain high extraction rate of phenolic substances, the existing two-phase system is not suitable

Method used

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  • A kind of extraction process of phenolic substances in wood vinegar
  • A kind of extraction process of phenolic substances in wood vinegar
  • A kind of extraction process of phenolic substances in wood vinegar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Accurately measure 1mL jujube seed vinegar in a 10mL centrifuge tube, pipette 2mL0.6mol / L sodium bicarbonate solution into the centrifuge tube slowly, shake gently by hand for 2min; quickly add 1g sodium sulfate, and simultaneously add 2mL ethyl acetate For ester, shake vigorously for 2 minutes; put it in a centrifuge, centrifuge at 3000r / min for 3 minutes, remove the organic phase; add 3mL of 0.1mol / L NaOH solution, shake vigorously for 10s, let the layers stand for 1min, and discard the organic phase ; Add 20 uL of concentrated sulfuric acid dropwise to adjust the pH to 4-5 to obtain phenolic substances.

Embodiment 2

[0043] It is the same as the extraction process of phenolic substances in the wood vinegar in Example 1, the difference is: the type of inorganic salt.

[0044] In this embodiment, 1 g of sodium sulfate is replaced with 1 g of ammonium sulfate.

Embodiment 3

[0046] It is the same as the extraction process of phenolic substances in the wood vinegar in Example 1, the difference is: the type of inorganic salt.

[0047] In this embodiment, 1 g of sodium sulfate is replaced with 1 g of sodium chloride.

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Abstract

The invention relates to a process for extracting phenolic substances from pyroligneous liquor. The process comprises steps as follows: 1), a 0.6 mol / L sodium bicarbonate solution is added to the pyroligneous liquor and oscillated for 1-3 min, a mixed liquid is obtained, and the volume ratio of the sodium bicarbonate solution to the pyroligneous liquor is 2:1; 2), inorganic salt and ethyl acetate are sequentially added to the mixed liquid obtained in the step 1) and oscillated for 1-3 min, and a suspension liquid is obtained; 3), the suspension liquid obtained in the step 2) is subjected to centrifugal processing, and an upper-layer organic phase is retained; 4), a 0.1 mol / L NaOH solution is added to the organic phase obtained in the step 3), the volume ratio of the NaOH solution to the pyroligneous liquor is 2:1, the mixture is violently oscillated for 10-20 s and left to stand for 1-2 min for layering, an aqueous phase is retained, the pH (potential of hydrogen) of the aqueous phase is adjusted to range from 4 to 5, and the phenolic substances are obtained. The phenolic substances in the pyroligneous liquor are effectively extracted through low-proportion mixing of ethyl acetate and the salting-out function of salt type sodium sulfate, the extraction rate is substantially improved, and the purity is also improved.

Description

technical field [0001] The invention relates to a process for extracting phenolic substances in wood vinegar. Background technique [0002] Wood vinegar is a liquid rich in phenolic substances obtained through a series of production processes such as dry distillation and condensation. Phenolic substances extracted from wood vinegar is a mixture with wide application prospects. This mixture has strong bactericidal and anti-diarrheal capabilities, and is often used as an intermediate in the synthesis of some medicines, or even directly as the main component of some medicines, such as the intestine-regulating pills and toothache medicines that are currently on the market. Due to its special properties, it is also often used in the production and synthesis of adhesives and polymers. On the other hand, since synthetic antioxidants have great potential carcinogenic risks, phenolic substances extracted from wood vinegar are also good substitutes for many synthetic antioxidants af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/04C07C37/72C07C43/23C07C41/38C07C49/825C07C45/80
CPCC07C37/72C07C41/38C07C45/80C07C39/04C07C43/23C07C49/825
Inventor 汪子明李占超孙爽胡滨
Owner JILIN UNIV