Preparation method of flavoring-grade cedarwood essential oil

A fir and essential oil technology, applied in the direction of essential oil/fragrance, fat production, etc., can solve the problems of narrow use area, different processing methods, and low sales volume

Active Publication Date: 2021-06-08
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fir oil extracted from fir raw materials is actually crude oil. Due to the different origins of raw materials, different parts of raw materials, and different processing methods, the internal chemical composition, aroma and other physical parameters are quite different. At present, there is no authoritative product standard of fir essential oil. Therefore, fir oil can only be sold as a raw material at present, and cannot be directly used as a natural spice for flavoring. The added value of the product is low, the application area is narrow, and the sales volume is small, which seriously restricts the development of the fir oil industry.

Method used

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  • Preparation method of flavoring-grade cedarwood essential oil
  • Preparation method of flavoring-grade cedarwood essential oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation of fragrance grade fir essential oil, the steps are as follows:

[0024] 1) Refining treatment of Chinese fir crude oil. Take 100 parts of Chinese fir crude oil extracted from Chinese fir sawdust raw materials, wherein the cedryl alcohol, cedrene, and phoenix cedrene content are 25%, 37%, and 1.5% respectively; place it at 0°C for 5 days, and centrifuge to obtain 8 parts of crystallization mainly based on cedarwood alcohol, 92 parts of mother liquor.

[0025] 2) vacuum distillation. Add 92 parts of mother liquor into the still, heat, heat up, and vacuumize; when there is distillate at the top of the tower, reflux for 0.5h, then adjust the reflux ratio, receive the first section of fractions, and collect each part according to the temperature range of the top of the tower. When the 6th section fraction is collected, the distillate has an obvious tendency to crystallize, indicating that the content of cedarwood alcohol is high, so stop heating and let ou...

Embodiment 2

[0033] The preparation of fragrance grade Chinese fir essential oil is the same as in Example 1, wherein, in step 3), the ratio of addition of cedarene is adjusted, specifically:

[0034] 3) Deployment and composition structure modification. Detect the optical rotation, refraction and relative density of each fraction, and evaluate the aroma; take 2-5 fractions to combine and prepare, and analyze with gas chromatography to determine that the contents of cedryl and cedrene in Chinese fir essential oil are 13.8% respectively , 46.5%, 2.1%, evaluate the aroma. Then add 5 parts of cedarene with a content of 88%, and finally obtain 76 parts of fragrance-grade Chinese fir essential oil. Chromatographic analysis shows that the contents of cedrene, cedrene, and cedrene in the product are 43.4%, 12.9%, and 7.8% respectively; the optical rotation is -17°; the product is compared with the product in Example 1, and the aroma of the sweet paste is more prominent, with an animal aroma mor...

Embodiment 3

[0036] The preparation of fragrance grade Chinese fir essential oil, the method is the same as in Example 1, wherein, in step 3), the adjustment and addition ratio of cedrene and cedrene are specifically:

[0037] 3) Deployment and composition structure modification. Detect the optical rotation, refraction and relative density of each fraction, and evaluate the aroma; take 2-5 fractions to combine and prepare, and analyze with gas chromatography to determine that the contents of cedryl and cedrene in Chinese fir essential oil are 13.8% respectively , 46.5%, 2.1%, evaluate the aroma. Then add 4 parts of cedrene with a content of 88%, and 3 parts of the end fraction with a content of cedryl alcohol of 71.1%, to finally obtain 79 parts of fragrance-grade Chinese fir essential oil. Chromatographic analysis shows that the contents of cedrene, cedrene, and cedrene in the product are 42.3%, 15.3%, and 6.4% respectively; The animal scent is more obvious.

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Abstract

The invention discloses a preparation method of flavor-blending-grade cedar essential oil. The method comprises the following steps: taking cedar crude oil as a raw material, crystallizing and separating cedar wood alcohol and mother liquor, then carrying out vacuum rectification on the mother liquor, and receiving fractions in sections; performing composition analysis on the fractions, and performing fraction composition blending and aroma modification according to cedar oil and cedar oil standards, so as to prepare an aroma-blending-grade cedar essential oil product; and using other components obtained in the process to prepare cedrol and other isolated perfumes. The flavoring-grade essential oil is developed through a crystallization technology, a vacuum fractionation technology and an essential oil chemical structure and fragrance modification technology, the flavoring-grade cedarwood essential oil is obtained for the first time, meanwhile, the additional value of the cedarwood oil is effectively increased, chemical components in the cedarwood oil are basically changed into products, efficient and high-quality comprehensive utilization of resources is achieved, and the preparation method is a comprehensive, green and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of natural fragrance processing, in particular to a method for refining Chinese fir crude oil and modifying its structure and aroma to prepare fragrance-grade Chinese fir essential oil. Background technique [0002] Chinese fir is the most important tree species for afforestation in southern China, with a huge stock volume. Every year, a large amount of residues are generated during the harvesting and processing of Chinese fir. These residues are not well utilized, resulting in a serious waste of resources. Studies have found that the chemical composition and aroma characteristics of fir oil are closer to cedar oil, and can be used to replace cedar oil in the fragrance industry. Cedarwood oil is one of the top ten essential oils in the world. Cedarwood oil and cedarwood-based spices have a unique aroma and are irreplaceable. They occupy a very important position in the fragrance industry. At present, the ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
CPCC11B9/022C11B9/027
Inventor 朱凯马守宵曹红霞邢兴怀
Owner NANJING FORESTRY UNIV
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