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Method for preparing ethyl oleate from Lauraceae plants

A technology of ethyl oleate, from Lauraceae, applied in the field of technical preparation in the agricultural field, can solve the problems of not preparing ethyl oleate, etc., achieve easy large-scale industrial production, strong production practicability, and increase effective utilization rate Effect

Inactive Publication Date: 2017-03-15
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Find through searching existing technical literature, also do not have the report of preparing ethyl oleate from camphor tree plant at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] After washing and drying the Lauraceae plants, dry them at 50°C, crush them and pass through a 50-mesh sieve, weigh 100g of powder, soak in absolute ethanol with 40 times the weight of the powder at room temperature for 72h, filter, and reduce the filtrate at 42°C. Concentrate under reduced pressure to obtain 21.1 g of the concentrate, then dissolve the concentrate with 200 ml of deionized water, then extract 3 times with an equal volume of petroleum ether, concentrate the petroleum ether phase obtained from the extraction under reduced pressure, and use a 200-300 mesh silica gel column. Gradient elution was carried out by using the petroleum ether-ethyl acetate system as the mobile phase and increasing the proportion of ethyl acetate. The target product was collected by TLC detection, the components containing the target substance were collected, concentrated and the solvent was evaporated to dryness, and then the obtained concentrate was further purified through a gel ...

Embodiment 2

[0028] After washing and drying the Lauraceae plants, dry them at 40°C, pass through a 30-mesh sieve after crushing, weigh 200g of powder, soak in absolute ethanol with 5 times the powder mass at room temperature for 24h, filter, and reduce the filtrate at 40°C. Concentrate under reduced pressure to obtain 25.1 g of the concentrate, then dissolve the concentrate with 500 ml of deionized water, then extract 3 times with 3 times the volume of ethyl acetate, concentrate the extracted ethyl acetate phase under reduced pressure, and use a 200-300 mesh Silica gel column, use cyclohexane-ethyl acetate system as the mobile phase to increase the ratio of ethyl acetate for gradient elution (for example, use ratios of 200:1, 180:1, 140:1, 120:1, 100:1, 80:1, 60:1, 40 :1, 20:1, 10:1, 5:1, 2:1, 1:1; of course, other ratios can also be used in other embodiments, which can be determined according to general principles and actual conditions). The target product was collected by TLC detection,...

Embodiment 3

[0030] After washing and drying the Lauraceae plants, dry them at 45°C, crush them and pass them through a 10-mesh sieve, weigh 100g of powder, soak them in absolute ethanol with 20 times the weight of the powder at room temperature for 48h, filter, and reduce the filtrate at 40°C. Concentrate under reduced pressure to obtain 16.1 g of the concentrate, then dissolve the concentrate with 20 ml of deionized water, then extract 3 times with 5 times the volume of petroleum ether, concentrate the petroleum ether phase obtained by extraction under reduced pressure, and use a 200-300 mesh silica gel column , using the cyclohexane-ethyl acetate system as the mobile phase to increase the proportion of ethyl acetate for gradient elution. The target product was collected by TLC detection, the components containing the target substance were collected, concentrated and the solvent was evaporated to dryness, and then the obtained concentrate was further purified through a gel column Sephadex...

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PUM

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Abstract

The invention provides a method for preparing ethyl oleate from Lauraceae plants. The method comprises the following steps: washing the Lauraceae plants, airing, drying, and crushing to form powder; carrying out immersing extraction on the powder by using ethanol at normal temperature, filtering, and carrying out reduced pressure vacuum concentration on the obtained filtrate; dissolving the obtained extract liquid concentrate in deionized water, and extracting by using petroleum ether or ethyl acetate; carrying out reduced pressure vacuum concentration on the extracted petroleum ether or ethyl acetate phase, and carrying out gradient elution by adopting a silica gel column with a petroleum ether-ethyl acetate system or a cyclohexane-ethyl acetate system as a mobile phase to increase the proportion of ethyl acetate; carrying out TLC detection to find the target product after the elution, collecting the target product, and carrying out reduced pressure vacuum concentration; and further purifying the finally obtained concentrate by allowing the concentrate to go through the gel column with a chloroform-methanol system as a mobile phase in order to obtain light yellow oil which is ethyl oleate. The method for preparing ethyl oleate has the advantages of simple operation, low cost, and high purity of the obtained product.

Description

technical field [0001] The invention relates to a technical preparation method in the agricultural field, in particular to a method for preparing ethyl oleate from Lauraceae plants. Background technique [0002] Lauraceae (Lauraceae) is a family of dicotyledonous plant class and magnolia subclass. Mostly trees or shrubs, only vines are twining parasitic herbs; often have oily or mucus cells. Including more than 2,000 species in 45 genera, mainly in tropical to subtropical regions. There are more than 1,400 species of 20 genera in China, most of which are produced in the provinces and regions south of the Yangtze River, and are the most prosperous in the southwest and south. Important raw materials for light chemical industry and medicine; some species such as Cinnamomum genus, Gingeria genus, Pepperoni genus, Cinnamon genus, Cinnamon genus and Phoebe genus, the fruits of which are rich in oil and aromatic oil, are used in industry It is very useful; many species of Laurac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/48C07C67/56C07C67/58C07C69/58
CPCC07C67/48C07C67/56C07C67/58C07C69/58
Inventor 代光辉陈义娟
Owner SHANGHAI JIAOTONG UNIV
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