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Method for purifying high-purity transacomhole

A technology of trans-anethole and purification method, which is applied in the field of purification of high-purity trans-anethole, can solve the problems of long process cycle and heavy workload, and achieve the effects of high product purity, low environmental pollution and cost reduction

Active Publication Date: 2011-11-23
GUANGXI WANSHAN SPICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purity of the product can reach more than 99.57%, but repeated freezing, pulverization and separation for many times, the workload is heavy and the process cycle is long

Method used

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  • Method for purifying high-purity transacomhole
  • Method for purifying high-purity transacomhole

Examples

Experimental program
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Effect test

example 1

[0021] 3536.2 kilograms of fennel oil, with a trans-anethole content (GC) of 87.811%, are put into a rectification tower for rectification. The pressure in the tower is constant at 100 Pa, and the kettle temperature is at 100° C. to obtain 2599.7 kilograms of anethole semi-finished products. The trans-anethole content ( GC) 97.673%. Put the semi-finished product of anethole into the freezer for freezing, the freezing time is 12 hours, and the freezing temperature is -3°C. Crush the frozen crystals to a size of about 15 mesh sieves, centrifuge the crushed body with a centrifuge at a speed of 1500r / min, and centrifuge for 30 minutes. The centrifuged liquid is subjected to secondary freezing, crushing, and centrifugation in the above-mentioned manner to obtain anethole The product finally obtained 2535.5 kg of anethole product, the content of trans-anethole (GC) was 99.737%, and the total yield was 71.7%.

example 2

[0023] With 3178.6 kilograms of fennel oil, trans-anethole content (GC) 87.829%, put into rectifying column rectification, the pressure in the tower is constant 105Pa, and kettle temperature is at 105 ℃, obtains 2256.5 kilograms of anethole semi-finished products, trans-anethole content ( GC) 98.192%, put the semi-finished product of anethole into the freezer for freezing, the freezing time is 16 hours, the freezing temperature is 5°C, the frozen crystals are crushed to the size of about 15 mesh sieves, and the crushed body is centrifuged with a centrifuge at a speed of 1500r / min , centrifuged for 30 minutes, and the centrifuged liquid was subjected to secondary freezing, pulverization, and centrifugation to obtain the anethole product in the above-mentioned manner, finally obtaining 2298.1 kilograms of anethole product, trans-anethole content (GC) 99.704%, and a total yield of 72.3% .

example 3

[0025] Put 2568.7 kilograms of fennel oil with trans-anethole content (GC) of 87.947% into a rectification tower for rectification. The pressure in the tower is constant at 110 Pa, and the kettle temperature is at 105° C. to obtain 1756.3 kilograms of anethole semi-finished products. The trans-anethole content ( GC) 97.216%, put the semi-finished product of anethole into the cold storage for freezing, the freezing time is 15 hours, the freezing temperature is -1°C, the frozen crystals are crushed to the size of about 20 mesh sieves, and the pulverized body is centrifuged with a centrifuge at a speed of 1600r / min, centrifuged for 30 minutes, and the centrifuged liquid was subjected to secondary freezing, crushing, and centrifugation to obtain anethole products in the above-mentioned manner, and finally obtained 1872.6 kg of anethole products, with a trans-anethole content (GC) of 99.823%, and a total yield of 72.9 %.

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Abstract

The invention discloses a new method for purifying high-purity transacomhole. Fennel oil is firstly rectified in vacuum at the pressure of less than 200Pa and kettle temperature of 100-130DEG C; and then, the obtained fennel oil is frozen, crystallized, smashed and separated to obtain anethole of which the purity is 99.7%. The technology has the advantages of short period, low energy consumption and high product purity, and meanwhile, the pure natural fennel taste of the product can be furthest kept.

Description

technical field [0001] The invention relates to a method for purifying high-purity trans-anethole. Background technique [0002] Star anise oil contains a variety of ingredients, the most important ones are α-pinene, Δ-carene, linalool, wormwood, cis-brain, trans-brain, anisaldehyde, caryophyllene, β-bergamotene, Their physical properties are different, and their freezing points are very different. In particular, anethole has a special fennel smell and corresponding sweetness, and can be used for flavoring all foods, especially pastries. It is also the raw material for the manufacture of anisaldehyde, anisole, and the synthetic drug negative hormone hexestrol. Anethole can be widely used in the formulation of fennel essence, licorice essence, bayberry essence, etc. It is also used in toothpaste, gargle, cosmetics, soap, etc. The freezing point of trans-anethole is 21-22°C, and the boiling point is 238.5°C / 0.1MP. [0003] At present, the purification methods of anethole i...

Claims

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Application Information

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IPC IPC(8): C07C43/215C07C41/34
Inventor 杨少凡刘新伟赖积南黄江涛文天寿胡林刚
Owner GUANGXI WANSHAN SPICE
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