Fruit preservative containing corn straw pyroligneous acid and application thereof

A technology of corn stalks and wood vinegar, which is applied in the field of food

Inactive Publication Date: 2018-09-28
HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first object of the present invention is to provide a kind of corn stalk wood vinegar, which solves the problem of extracting wood vinegar from corn stalks

Method used

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  • Fruit preservative containing corn straw pyroligneous acid and application thereof
  • Fruit preservative containing corn straw pyroligneous acid and application thereof
  • Fruit preservative containing corn straw pyroligneous acid and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This example illustrates the preparation method of corn stalk wood vinegar.

[0028] Use corn stalks as raw materials, cut into small pieces of 2-3cm, weigh a certain amount of corn stalks each time in the carbonization furnace, and control the combustion temperature through the temperature control system of the carbonization furnace. Collect the wood vinegar when it appears, and obtain the crude wood crude liquid.

[0029] Take the crude wood vinegar liquid in a round bottom flask, install a pressurized distillation device, and start collecting the distillate at 98-103°C when the temperature rises to 98°C, which is the first vacuum distillation distillate, and transfer the above liquid into the round bottom flask , Operate as above, and carry out the second vacuum distillation to obtain refined wood vinegar.

Embodiment 2

[0032] Take 100g of refined wood vinegar, extract 6 times with 30mL ether each time, combine the ether extracts, and recover the ether through a rotary evaporator to obtain dehydrated wood vinegar, which is used as an infrared spectrophotometer to analyze samples.

[0033] The conditions of the infrared spectrophotometer are: wave number range: 4000-400cm-1. Wavenumber accuracy: ≤±4cm-1(4000-2000cm-1); ≤±2cm-1(2000-400cm-1). Resolution ability: 1.5cm-1 (near 1000cm-1). Transmittance accuracy: ±0.2% T not included (noise level). Io line straightness: ≤±2%T. Stray light: ≤0.5%T(4000-650cm-1); test mode: transmittance. Scan Speed: Normal Slit Program: Normal. Response: OK. Working mode: fixed wavelength scanning.

[0034] The result is as figure 2 As shown, it can be seen from the infrared analysis chart that the blunt peak near 3400cm-1 is the characteristic absorption peak produced by OH, the double peak at 2800-3000cm-1 is the characteristic absorption peak produced by...

Embodiment 3

[0036] This example illustrates the antibacterial experiment of corn stalk wood vinegar.

[0037] The Oxford cup method was used to carry out the bacteriostatic test on Shigella, Salmonella, Listeria monocytogenes and Staphylococcus aureus and three molds of Penicillium, Trichoderma viridans and Trichoderma reesei. Heat the sterilized PDA agar medium until it completely melts, pour it into petri dishes, 20ml per dish, and wait for it to solidify. Spread 1mL of bacterial suspension or spore suspension evenly on the surface of the culture medium with a sterile applicator. Place an Oxford cup (a round tube with an inner diameter of 6 mm, an outer diameter of 8 mm, and a height of 10 mm) directly and vertically on the surface of the culture medium, pressurize gently to make it contact with the culture medium without gaps, and add 200 microliters into the cup with a pipette gun. Raise the sample to be tested (refined wood vinegar or sterilized water), and keep it from overflowing....

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Abstract

The invention relates to corn straw pyroligneous acid. The corn straw pyroligneous acid is prepared by the following method: (1) taking corn straw as a raw material, cutting the corn straw into smallblocks 2-3cm in length, burning the straw at 500-700 DEG C by using a charring furnace, and collecting distillate at the temperature range to obtain crude pyroligneous acid; and (2) performing secondary reduced pressure distillation, and collecting distillate at 98-103 DEG C to obtain refined pyroligneous acid. The invention also relates to application of the corn straw pyroligneous acid in bacteriostasis and a fruit preservative containing the corn straw pyroligneous acid. The corn straw pyroligneous acid provided by the invention has varying degrees of inhibiting effects on four types of bacteria including shigella, salmonella, listeria monocytogenes and staphylococcus aureus, and three types of molds including penicillium, trichoderma virens and trichoderma reesei, and the bacteriostatic effects on the molds are better than the bacteriostatic effects on the bacteria. The corn straw pyroligneous acid has certain preservation effects and can be used as a fruit preservative.

Description

technical field [0001] The invention belongs to the field of food, and relates to a corn stalk wood vinegar fruit fresh-keeping agent and its application. Background technique [0002] my country produces a large amount of crop straws every year. According to statistics, the total annual output of crop straws in my country is about 700 million tons, of which rice, wheat and corn straws account for about 76% of the total. Crop straw is one of the main biomass resources. If it is properly utilized, it will produce huge environmental, social and economic benefits. At present, the pyrolysis technology of crop straw under high temperature and anoxic conditions has attracted more and more researchers' attention because of its low investment, high efficiency, diverse products, and benefit for energy saving and emission reduction. Through this technology, the pyrolysis of straw produces a liquid substance that is condensed to obtain an alkaline distillate, which is customarily call...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/154
CPCA23B7/154A23V2002/00A23V2250/21
Inventor 张丽媛魏春红李佐同赵长江
Owner HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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