A method for efficiently extracting phenolic extracts from wood vinegar
A technology of wood vinegar and extract, applied in chemical instruments and methods, preparation of organic compounds, preparation of ethers, etc., can solve the problems of high price, cannot be directly applied in the field of medicine, etc., and achieves the effect of optimizing the ratio
Active Publication Date: 2020-07-28
JILIN UNIV
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Problems solved by technology
However, this method will introduce a large amount of impurities such as acetic acid and furfural into the phenolic extract, and cannot be directly applied in the field of medicine
Although Shinsuke obtained relatively pure phenolic extracts by combining ethyl acetate, sodium bicarbonate, and column purification, this method is expensive and inevitably brings in a large amount of furfural
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Embodiment 1
[0048] figure 1 It is a flow chart of the method for extracting phenolic extracts in wood vinegar according to Example 1 of the present invention. Such as figure 1 As shown, add 300mL wood vinegar (that is, crude wood vinegar) three times using 100mL ethyl acetate each time, discard the water phase, and leave the organic phase; then use 100mL of 0.6mol / L sodium bicarbonate solution for three times Grade extraction, discarding the water phase, leaving the organic phase, wherein the solution obtained by sodium bicarbonate extraction is the water phase, and the phenolic extract is in the ethyl acetate phase; take 100mL of the organic phase solution, add 1mol / L100mL sodium hydroxide Three-stage extraction, combining the extracts, adding 3mL of concentrated phosphoric acid to adjust the pH of the solution to 6.0, and obtaining the crude extract of phenolic extracts; then, adding 100mL of 10% Na 2 HPO 4 After shaking the solution evenly, add 100mL of 1:1 (V / V) n-hexane:ethyl acet...
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The present invention relates to a method for efficiently extracting a phenol-based extract from a pyroligneous acid. The method comprises: extracting a pyroligneous acid three times with ethyl acetate, and combining the obtained extraction liquids to obtain a first-stage pyroligneous acid; extracting the first-stage a pyroligneous acid three times by using a 0.6 mol / L NaHCO3 solution, and combining the obtained extraction liquids to obtain a second-stage pyroligneous acid; extracting the second-stage pyroligneous acid twice by using a 1 mol / L sodium hydroxide solution, combining the obtained extraction liquids to obtain a crude phenol extract, adding concentrated phosphoric acid to the crude phenol extract, and adjusting the PH value to obtain a third-stage pyroligneous acid; adding a Na2HPO4 solution with a mass concentration of 5%, 10%, 15% or 20%, uniformly shaking, and extracting with a mixed liquid to obtain a four-stage pyroligneous acid; and carrying out rotary evaporation on the four-stage pyroligneous acid, and drying to obtain the phenol-based extract. The invention provides the method for efficiently extracting the phenol-based extract from the pyroligneous acid, wherein the proportion of the phenol-based extract is optimized, and the results prove that the method is practicable.
Description
technical field [0001] The invention relates to a method for efficiently extracting phenolic extracts from wood vinegar. Background technique [0002] Wood vinegar is a yellow-brown liquid rich in substances such as acids, phenols, and ketones. In recent years, wood vinegar has been widely used in the fields of biomedicine and cosmetics. Scientists have found that wood vinegar has strong bactericidal and antioxidant properties. At the same time, Ho et al. found that wood vinegar has strong anti-inflammatory properties both in vivo and in vitro in 2013, which confirmed that wood vinegar can be used for the treatment of NLRP3 and metabolic syndrome. The above findings have laid a solid theoretical foundation for the wide application of wood vinegar in the field of biomedicine. Loo et al. confirmed in 2007 that phenolic extracts are the main antioxidant substances in wood vinegar. At the same time, Shinsuke confirmed in 2012 that phenolic extracts are the main bactericidal ...
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IPC IPC(8): C07C41/34C07C43/23C07C37/68C07C39/04C07C39/07
CPCC07C37/685C07C41/34C07C43/23C07C39/04C07C39/07
Inventor 汪子明李占超李建明胡滨
Owner JILIN UNIV