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Method for preparing fenchyl acetate

A technology of fecundyl acetate and acetic anhydride, which is applied in the field of organic compound preparation, can solve problems such as low product purity, complex product components, and difficult separation, and achieve the effects of simple process, high purity, and broad market promotion prospects

Inactive Publication Date: 2013-04-03
广西辰康生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional synthesis method of fenchyl acetate is obtained by direct esterification of acetic acid and fenchyl alcohol. The reaction time of this method is long, the reaction is incomplete, the esterification is low, the product components are complex, the separation is difficult, and the product purity is not high.

Method used

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  • Method for preparing fenchyl acetate
  • Method for preparing fenchyl acetate
  • Method for preparing fenchyl acetate

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Embodiment Construction

[0054] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0055] figure 1 Show the realization flow process of the preparation method of the fenchyl acetate that the embodiment of the present invention provides, detailed description is as follows:

[0056] 1) Take the input amount of the following raw and auxiliary materials as an experiment:

[0057] Fenchol: 374.4kg; Acetic anhydride: 249.1kg; Catalyst: 17.1kg; 30% NaOH solution: 374.4kg.

[0058] 2) Experimental process:

[0059] 2.1) Reaction

[0060] Table 1

[0061]

[0062] Table 2

[0063]

[0064] table 3

[0065]

[0066] 2.2) Washing

[0067] Table 4

[0068]

[0069] ...

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Abstract

The invention relates to a chemical article, specifically to a method for preparing fenchyl acetate. The product is synthesized from fenchol, acetic anhydride and a catalyst in the ratio of 1: 0.73: 0.08. The finished product having the content of greater than 97.0% is obtained through high-temperature reaction, cooling, alkalifying neutralization, washing and fractionation through a vacuum rectification tower. The product provided by the invention is not only high in purity, but also stable in performance and not easy to deteriorate, and is a colorless to faint yellow transparent liquid which has soft and sweet fir similar aroma; and the product is mainly used for preparing fresh vanilla, costus root and mint flavored edible essence (coniferous note) and essence for daily use.

Description

technical field [0001] The invention is applicable to the field of organic compound preparation, and in particular relates to a preparation method of fenchyl acetate. Background technique [0002] The product of the present invention, fenchyl acetate, is also called 1,3,3-trimethylbicyclo-2-norborneol ethyl ester, fenchyl acetate, and its molecular formula is C 12 h 20 o 2 ; Relative molecular weight 196.29; Physical and chemical properties are colorless to light yellow liquid, with soft, sweet fir-like aroma, slightly soluble in water, easily soluble in organic solvents such as oil and alcohol, boiling point 220 ℃ 101.325kPa, flash point (TCC ) 75.56°C, optical rotation +45°~+55°, refractive index 1.4540~1.459020°C, specific gravity 0.9650~0.978025°C. It is an ester product widely used in the preparation of various food flavors and daily flavors. [0003] The general production method of carboxylate fragrances includes direct esterification of carboxylic acid and alcoho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/14C07C67/08
Inventor 何春茂李华杰朱金忠杨安陆艳萍
Owner 广西辰康生物科技有限公司
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