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Preparation method of citral diethyl acetal natural perfume

A technology of citral diethyl acetal and natural fragrances, which is applied in the direction of essential oils/fragrances, fat production, etc., can solve the problems of poor quality, citral-type plant essential oils, easy to deteriorate and odor, etc., and achieve good aroma, storage resistance, and production low cost effect

Active Publication Date: 2017-12-01
GUANGXI FORESTRY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a kind of preparation method of citral diethyl acetal natural spices in order to overcome the problem that the natural citral type plant essential oil is easy to deteriorate and has bad smell

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The method for preparing natural spices containing citral diethyl acetal by using citronella raw material comprises the following steps:

[0030] (1) After the citronella grass is picked and removed, cut it into sections to 5cm, put it in a still, add ethanol and water to the still pot to submerge the raw materials, the addition of the ethanol is 8% of the weight of the citronella grass, and then add Toluenesulfonic acid regulates the pH of the aqueous ethanol solution to 3.5; the distillation pot is a stainless steel pot, the top of the distillation pot is connected with the condenser and the oil-water separator in turn, and a heating coil is installed at the bottom of the distillation pot, through which the distillation The ethanol aqueous solution in the pot is heated;

[0031] (2) Heat to boil the water in the distillation pot for 2 hours, the generated water vapor will take the essential oil out, enter the condenser to condense, and then enter the oil-water separat...

Embodiment 2

[0041] The method for preparing the natural fragrance containing citral diethyl acetal by utilizing the litsea cubeba raw material comprises the following steps:

[0042](1) After picking Litsea cubeba and removing impurities, put it in a still, add ethanol and water to the still to submerge the raw materials, the amount of ethanol added is 20% of the weight of Litsea cubeba, and then add formic acid to adjust the ethanol The pH of the aqueous solution is to 4.5; the distillation pot is a stainless steel pot, and the top of the distillation pot is connected with a condenser and an oil-water separator in turn, and a heating coil is installed at the bottom of the pot in the distillation pot, and the ethanol aqueous solution in the distillation pot is supplied by the heating coil to heat;

[0043] (2) Heat to boil the water in the distillation pot for 1.5 hours, the generated water vapor will take out the essential oil, enter the condenser to condense, and then enter the oil-wate...

Embodiment 3

[0053] The method for preparing the natural fragrance containing citral diethyl acetal by utilizing the litsea cubeba raw material comprises the following steps:

[0054] (1) After picking Litsea cubeba and removing impurities, put it in a still, add ethanol and water to the still to submerge the raw materials, the amount of ethanol added is 10% of the weight of Litsea cubeba, and then add acetic acid to adjust the ethanol The pH of the aqueous solution is up to 6; the distillation pot is a stainless steel pot, and the top of the distillation pot is connected with the condenser and the oil-water separator in turn, and a heating coil is installed at the bottom of the pot in the distillation pot, and the ethanol aqueous solution in the distillation pot is supplied by the heating coil to heat;

[0055] (2) Heat to make the water in the distillation pot boil for 2.5 hours, the generated water vapor will take out the essential oil, enter the condenser to condense, and then enter th...

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Abstract

The invention discloses a preparation method of a citral diethyl acetal natural perfume. The method comprises the steps of picking up the raw materials, removing impurities and putting the raw materials into a column boiler; adding ethanol and water to the column boiler to submerge the raw materials and adding acid to adjust the pH to be 3-6; boiling water in the column boiler for 1-3h through heating, taking out essential oil along with generated water vapor, entering a condenser for condensation, entering an oil-water separator for separation, taking the separated upper layer as crude essential oil, refluxing a lower water solution and then entering the column boiler; dewatering and drying the separated crude essential oil to obtain an essential oil product containing citral diethyl acetal, carrying out vacuum rectification and thus obtaining citral and citral diethyl acetal natural perfume separately. The method is simple in process, low in production cost and low in energy consumption, the obtained citral diethyl acetal is light in color, good in fragrance and stable in storage, and industrial production is easy to implement.

Description

technical field [0001] The invention relates to the technical field of natural fragrance processing, in particular to a preparation method of citral diethyl acetal natural fragrance. Background technique [0002] The molecular formula of citral (Citral) is C 10 h 16 O, the chemical name is 2,6-dimethyl-2,6-octadienal, 3,7-dimethyl-2,6-octadienal, it has two isomers, cis and trans, is One of the most important representatives of open-chain monoterpenes. Natural products exist in citronella oil (70-80%), litsea cubeba oil (about 70%), lemon oil, lime oil, citrus leaf oil, etc. Citral is widely used, mainly used in the preparation of lemon flavor and citrus flavors, and also used in the synthesis of flavor ionone (raw material for vitamin A synthesis), citric nitrile, methyl ionone, hydroxycitronellal, isopulegol, Compounds such as dihydrodamascone. It also has antibacterial and pheromone functions. It is also an important food spice (GB 2760-96), which can be used to pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
CPCC11B9/022C11B9/025C11B9/027
Inventor 孟中磊周丽珠曾永明梁忠云秦荣秀李桂珍
Owner GUANGXI FORESTRY RES INST
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