Method for efficiently lowering agricultural residue content in essential oil

A technology of agricultural residues and essential oils, applied in the agricultural field, can solve the problem of taking away or destroying the volatile components of essential oils

Inactive Publication Date: 2017-01-25
GUANGDONG LIJINYOU AGRI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods will more or less take away or destroy the volatile components in essential oils, so they are rarely used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for effectively reducing the content of agricultural residues in essential oils, comprising the following steps:

[0025] In 20g pomelo peel essential oil, add the ionic liquid of 20g (by 1-hexyl-3-methyl-imidazoline chloride and N-butyl-3-methylpyridine dicyandiamide by mass ratio 3:2 composition), at temperature 30°C, ultrasonic power 450w / L for 7 minutes, ultrasonic extraction 3 times.

[0026] Among them, pomelo peel essential oil may contain the following agricultural residues: ethyl 2,4-acetate, 2-o-phenylphenol, bromofen, amethanel, chlorpyrifos, diananon, dicofol, ethion, Imazalil, malathion, mefenaxyl, methafos, parathion-methyl, pirimiphos-methyl, prochloraz, clofenac, fenpyridazin, and tetrachlorodiphenylsulfone.

[0027] Transfer the ionic liquid / essential oil mixture to a centrifuge tube, centrifuge at 5000rpm for 10min, and then discharge the ionic liquid layer from the lower part of the centrifuge tube;

[0028] Add 20g of deionized water to th...

experiment example 2

[0032] A method for effectively reducing the content of agricultural residues in essential oils, the materials and steps of which are the same as in Example 1, except for the composition of the ionic liquid;

[0033] The ionic liquid of the present embodiment consists of 1-n-butyl-2,3-dimethylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium dicyandiamide salt, 1-hexyl-3-methyl Imidazolium chloride salt, 3-methyl-1-octyl imidazolium chloride salt, 1-butyl-3-methylimidazolium methyl sulfate, N-butyl-3-methylpyridine dicyanamide, 1-butyl- The composition of 1-methylpyrrolidine dicyandiamide and 4-methyl-N-butylpyridine tetrafluoroborate is in a mass ratio of 14:11:8:26:17:16:6:2.

[0034] After determination, the removal rate of agricultural residues in pomelo peel essential oil is shown in the following brackets: 2,4-ethyl acetate (96%), 2-o-phenylphenol (86%), bromofen (71%) , Amethalin (99.3%), Chlorpyrifos (78%), Diananon (89%), Dicofol (85%), Ethion (87%), Imazali...

experiment example 3

[0036] A method for effectively reducing the content of agricultural residues in essential oils, the materials and steps of which are the same as in Example 1, except for the composition of the ionic liquid;

[0037] The ionic liquid of the present embodiment consists of 1-ethyl-3-methylimidazole dicyanamide, 1-ethyl-3-methylimidazole tosylate, 1-ethyl-3-methylimidazole diethyl phosphoric acid salt, 1-ethyl-3-methylimidazole thiocyanate, 1-ethyl-3-methylimidazole ethyl sulfate, 1-ethyl-3-methylimidazole trifluoroacetate, 1-ethyl Base-3-methylimidazolium trifluoromethanesulfonate, 1-ethyl-3-methylimidazolium tetrafluoroboric acid, 1-butyl-2,3-dimethylimidazolium trifluoroacetic acid methylsulfonate and The composition of 1-propyl-3-methylimidazolium iodide salt is in mass ratio of 9:3:3:6:1:11:15:20:30:2.

[0038] After determination, the removal rate of agricultural residues in pomelo peel essential oil is shown in the following brackets: 2,4-ethyl acetate (89%), 2-o-phenylph...

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PUM

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Abstract

The invention discloses a method for efficiently lowering agricultural residue content in essential oil. The method comprises the following steps: mixing plant essential oil and an ionic liquid, uniformly mixing by ultrasonic oscillation, centrifugating at 2000-10000 rpm for 5-25 minutes to separate the essential oil layer from the ionic liquid layer, and pouring out the upper essential oil layer; and cleaning the essential oil with deionized water several times, and dewatering the essential oil with a water absorbent to obtain purified essential oil, wherein the ionic liquid is composed of anions and cations. The ion pair reagent is insoluble in the essential oil, but most agricultural residues have high solubility in the ion pair reagent. The ultrasonic technique can accelerate the extraction of agricultural residues in the essential oil, thereby lowering the pesticide and weedicide content in the essential oil.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a method for effectively reducing the content of agricultural residues in essential oils. Background technique [0002] "Agricultural residues" means the residues of various agricultural chemicals applied to cultivated crops and trees, which remain in agricultural crops and products derived from them, sometimes in very low levels, but most of the time The content is also higher. [0003] These agricultural chemicals are mainly used to control pests (insects and spiders) and fungal reproduction. They are highly toxic to target organisms, but sometimes they are also toxic to humans, so people hope to remove agricultural residues in essential oils as much as possible. . [0004] There are hundreds of types of agricultural residues, and it is almost impossible to completely remove them, and it is not economical. The best approach is to reduce the amount of agricult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
CPCC11B9/022
Inventor 李永生丘泰球罗杏良王超邹雨辰
Owner GUANGDONG LIJINYOU AGRI SCI & TECH CO LTD
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