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Method for extracting essential oil and additional products from fresh wintersweet flowers

An additional product, the technology of wintersweet flowers, which is applied in the directions of essential oils/fragrances, fat production, recovery/refining of fatty substances, etc., can solve the problems of not being able to obtain at the same time, cooking peculiar smell, and low yield of essential oils, etc., to improve the overall economy value, maintaining aroma, and improving economic benefits

Inactive Publication Date: 2013-02-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steam distillation requires less equipment and is simpler to operate. However, due to the adverse effects of high-temperature steam, many components are thermally decomposed, hydrolyzed, and dissolved in water. The final yield of essential oil is low, and the quality of essential oil is poor. smell
You can't get other add-on products at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 1kg of picked fresh wintersweet flowers, put them into 10L of petroleum ether at 30-60°C, reflux extraction, repeat twice, and concentrate the extract under reduced pressure to obtain 50g of extract, dissolve the extract in 500mL of ethanol, freeze, and filter , Obtain 10g white wintersweet flower wax. The ethanol extract was concentrated under vacuum to obtain 10 g of wintersweet flower essential oil. The residue of wintersweet flowers treated with petroleum ether was extracted with boiling water (10L), and the extraction was repeated twice. The extract was concentrated under reduced pressure to 250mL, added with 1L of absolute ethanol, placed at 4°C overnight, the precipitate was collected by centrifugation, and vacuum-dried to obtain wintersweet Flower polysaccharide 50g.

Embodiment 2

[0016] Take 5kg of picked fresh wintersweet flowers, put them into 50L of petroleum ether at 30-60°C, reflux extraction, repeat twice, and concentrate the extract under reduced pressure to obtain 250g of extract, dissolve the extract in 2L of ethanol, freeze, and filter , Obtain white wintersweet flower wax 50g. The ethanol extract is concentrated in vacuo to obtain 50g of wintersweet flower essential oil. The residue of wintersweet flowers treated with petroleum ether was extracted with boiling water (50L), and the extraction was repeated twice. The extract was concentrated under reduced pressure to 1.25L, added 7.5L of absolute ethanol, placed at 4°C overnight, centrifuged to collect the precipitate, vacuum Dried to obtain 250g of wintersweet flower polysaccharide.

Embodiment 3

[0018] Take 100g of picked fresh wintersweet flowers, put them into 1L petroleum ether at 30-60°C, reflux extraction, repeat twice, and concentrate the extract under reduced pressure to obtain 5g of extract, dissolve the extract in 40mL of ethanol, freeze, and filter , to obtain white wintersweet flower wax 1g. The ethanol extract was concentrated under vacuum to obtain 1g of wintersweet flower essential oil. The residue of wintersweet flower treated with petroleum ether is extracted with boiling water (1L), extracted twice, the extract is concentrated under reduced pressure to 25mL, added with 150mL of absolute ethanol, placed at 4°C overnight, the precipitate is collected by centrifugation, and vacuum-dried to obtain wintersweet flower Polysaccharide 5g.

[0019] The extracted essential oil of wintersweet flower was analyzed by GC-MS technique, and 111 components were separated from the chemical components of wintersweet flower essential oil extracted by organic solvent met...

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PUM

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Abstract

The invention relates to a method for extracting wintersweet flower essential oil and line products from fresh wintersweet flowers. The method comprises the following steps of: performing pretreatment on the fresh wintersweet flowers, placing petroleum ether with the specification of 30-60 DEG C into the fresh wintersweet flowers, performing reflux extraction, performing vacuum concentration on extract liquid to obtain a liquid extract, adding the liquid extract into ethanol for dissolution, freezing and filtering to obtain white wintersweet flower wax. The wintersweet flower essential oil can be obtained by performing vacuum concentration on ethanol leaching liquor. Wintersweet flower crude polysaccharides can be obtained by extracting wintersweet flower residues treated by the petroleum ether by adopting boiling water, performing the vacuum concentration on the extract liquid, adding a certain volume of absolute alcohol, placing at the temperature of 4 DEG C overnight, centrifugally collecting precipitates and performing vacuum drying. The essential oil extracted by the method disclosed by the invention can avoid high-temperature processes and keep the unique aroma of the wintersweet flowers, and has the advantages of natural aroma, simple process and lower cost; and simultaneously, the line products of the wintersweet flower wax and the polysaccharides can be obtained, and the overall economic value can be improved.

Description

technical field [0001] The invention relates to a method for extracting essential oil from wintersweet flowers and simultaneously obtaining wintersweet wax and polysaccharide additional products. Background technique [0002] Wintersweet (Chimonanthus praecox (linn.) Link) is a deciduous shrub of the genus Chimonanthus praecox (linn.) Link. It is a traditional garden flower and landscaping plant in my country. It has excellent ornamental value in color, fragrance, shape, posture and rhyme. Wintersweet flower has high medicinal and health care value except sending out the fragrance of Qingxin. [0003] The flowers of wintersweet contain volatile aromatic oil substances, which are very potential flavor raw materials. The extraction method of the wintersweet flower essential oil reported in the literature is mainly the steam distillation method at present. Steam distillation requires less equipment and is simpler to operate. However, due to the adverse effects of high-tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02C11B11/00C08B37/00
CPCY02W30/74
Inventor 夏玮张文清宋洁琼李思杜永芹程勤贤田晓龙
Owner EAST CHINA UNIV OF SCI & TECH
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