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Molecular imprinting method for extracting jasmone and jasmine lactone from jasmine flower residues

A technology of molecular imprinting and jasmine residue, which is applied in the field of extraction of jasmone and jasmonolactone, can solve the problems of solvent pollution, low yield, cumbersome purification, etc., and achieve the effect of increasing added value, high purity, and increasing economic benefits

Inactive Publication Date: 2020-08-25
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extraction of jasmone and jasmonolactone in jasmine residue by this method is more complicated in the later stage of purification, and the yield is low and the solvent pollution is serious

Method used

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  • Molecular imprinting method for extracting jasmone and jasmine lactone from jasmine flower residues
  • Molecular imprinting method for extracting jasmone and jasmine lactone from jasmine flower residues
  • Molecular imprinting method for extracting jasmone and jasmine lactone from jasmine flower residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Take 1 kg of jasmine residue left after scenting jasmine tea provided by Hengxian Nanfang Jasmine Tea Factory, clean it, add 3 times the quality of pure water, and stir evenly. Then put the resulting mixed solution into a 10-liter GSH vacuum distillation reactor (provided by Weihai Huanyu Chemical Machinery Co., Ltd.), vacuumize at -95.5kPa, control the boiling temperature of the mixed solution at 55°C, and boil and reflux for 1 hour to obtain jasmine. slag mixture;

[0042] (2) Dissolve 1mmol of jasmone and 6mmol of methylene succinic acid in 10mL of dichloromethane, keep it at 0°C for 0.5 hours, and then add 15mmol of ethylene glycol dimethacrylate (EDMA) as a crosslinking agent 15mmol of N,N'-methylenebisacrylamide, add 40mg of azobisisoheptanonitrile (ABHN) as an initiator, mix and pass nitrogen gas into it, and stir until completely dissolved. Nitrogen gas was passed in for another 10 minutes, and the seal was sealed. The temperature was raised to 65°C, and t...

Embodiment 2

[0047] (1) Take 2 kg of jasmine residue left after scenting jasmine tea provided by Hengxian Nanfang Jasmine Tea Factory, clean it, add 4 times the quality of pure water, and stir evenly. Then put the resulting mixed solution into a 15-liter GSH vacuum distillation reactor (provided by Weihai Huanyu Chemical Machinery Co., Ltd.), vacuumize at -96.5kPa, control the boiling temperature of the mixed solution at 50°C, and boil and reflux for 1.5 hours to obtain jasmine. slag mixture;

[0048] (2) Dissolve 1.3mmol of jasmone and 6mmol of methylene succinic acid in 12mL of dichloromethane, keep it at 0°C for 0.8 hours, and then add a cross-linking agent, namely 20mmol of ethylene glycol dimethacrylate (EDMA ), 20mmol of N,N'-methylenebisacrylamide, add 50mg of azobisisoheptanonitrile (ABHN) as an initiator, mix and inject nitrogen gas, and stir until completely dissolved. Nitrogen gas was passed in for another 10 minutes, and the seal was sealed. The temperature was raised to 65°C...

Embodiment 3

[0053] (1) Take 5kg of jasmine residue left after scenting jasmine tea provided by Hengxian Nanfang Jasmine Tea Factory, clean it, add 5 times the quality of purified water, and stir evenly. Then put the resulting mixed solution into a 30-liter GSH vacuum distillation reactor (provided by Weihai Huanyu Chemical Machinery Co., Ltd.), vacuumize at -97.5kPa, control the boiling temperature of the mixed solution at 45°C, and boil and reflux for 2 hours to obtain jasmine. slag mixture;

[0054] (2) Dissolve 1.5mmol of jasmone and 6mmol of methylene succinic acid in 15mL of dichloromethane, place at 0°C for 1 hour, and then add a crosslinking agent, namely 25mmol of ethylene glycol dimethacrylate (EDMA ), 25mmol of N,N'-methylenebisacrylamide, add 100mg of azobisisoheptanonitrile (ABHN) as an initiator, mix and inject nitrogen gas, and stir until completely dissolved. Nitrogen gas was passed in for another 10 minutes, and the seal was sealed. The temperature was raised to 65°C, an...

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Abstract

The invention discloses a molecular imprinting method for extracting jasmone and jasmine lactone from jasmine flower residues. The method comprises the following steps: adding water into the jasmine flower residues, carrying out uniform mixing and stirring, and conducting decocting at a reduced pressure and at a low temperature to obtain a jasmine flower residue mixed solution; respectively adsorbing jasmone and jasmine lactone in the jasmine flower residue mixed solution by utilizing a jasmone molecularly-imprinted material and a jasmine lactone molecularly-imprinted material under a low-temperature ultrasonic condition; respectively washing out jasmone and jasmine lactone in the jasmone molecularly-imprinted material and the jasmine lactone molecularly-imprinted material, and carrying out oil-water separation to obtain jasmone and jasmine lactone; and conducting oil-water separation to obtain jasmone and jasmine lactone. According to the method, perfume is extracted from the jasmineflower residues obtained after tea making through the green and environment-friendly molecular imprinting method, no toxic or harmful solvent is added in production, the waste jasmine flower residuesare turned into the wealth, treatment cost is saved for scented tea enterprises, the additional value of jasmine flowers is increased, and economic benefits can be greatly increased.

Description

technical field [0001] The invention belongs to the field of natural essence processing and relates to a method for extracting jasmone and jasmonolactone. Especially the method for extracting jasmone and jasmine lactone from the jasmine slag left after the scenting of jasmine tea. Background technique [0002] The jasmine tea industry basically belongs to the green industry, but there are also waste residues, the so-called jasmine residues. These are the yellowed and semi-withered flowers left by jasmine flowers after they enhance the fragrance of tea leaves. Only medium-sized jasmine tea manufacturers can produce thousands of tons of scented tea a year, and nearly 10,000 tons of flower dregs are produced, accounting for The site is very large and difficult to store, and can only be used as fertilizer or feed, causing huge waste. In fact, most of the jasmine flowers in southern my country are double-petal jasmine flowers, with a strong and long-lasting fragrance. Compared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/78C07C45/79C07C49/647C07D309/30B01J20/26B01J20/30B01D15/08
CPCC07C45/78C07C45/79C07D309/30B01J20/268B01J20/3057B01D15/08C07C2601/10C07C49/647
Inventor 刘旭谢宏华王立升梁跃辉罗朝巍
Owner GUANGXI UNIV
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