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A method for continuously separating high-purity longifolene from heavy turpentine

A technology for heavy turpentine and longifolene, applied in distillation purification/separation, adsorption purification/separation, organic chemistry, etc., can solve the problems of waste generation, inability to fully utilize resources, high energy consumption, etc., to increase content and save Energy, the effect of extending the collection time

Active Publication Date: 2016-03-09
GUANGXI FORESTRY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the existing technologies for the development and utilization of heavy turpentine, batch distillation and removal of β-caryophyllene are mostly used to obtain a higher content of longifolene, which has the disadvantages of waste generation, high energy consumption, and inability to fully utilize resources

Method used

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  • A method for continuously separating high-purity longifolene from heavy turpentine

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Experimental program
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Effect test

Embodiment 1

[0029] Heavy turpentine raw material, produced in Guangxi, the main components are: α-pinene 6.5%, longifolene 60.8%, β-caryophyllene 5%. Use a vacuum pump to discharge the air in the rectification tower, and the vacuum degree in the rectification tower reaches -0.09MPa. Through the negative pressure of the rectification tower tank and the raw material storage tank, the raw material is sucked into the rectification tower tank. Open the inlet valve of the column pipe heated by steam in the bottom of the rectification column to heat the raw materials in the bottom of the column, and at the same time open the water inlet valves of the condenser and cooler at the top of the tower. The temperature of the tower bottom is controlled at 100-120°C, the temperature of the top of the tower is controlled at 80-100°C, and the total reflux is 0.5-1h, then the product discharge valve is opened, the reflux ratio is controlled at 8:1-15:1, and the fractionated product is Perform specific gravi...

Embodiment 2

[0031] The raw material of heavy turpentine is produced in Guangxi, and the main components are: α-pinene 6.5%, longifolene 62.3%, β-caryophyllene 7%. Firstly, the heavy turpentine is preheated to 40-50°C, and then the raw material is sucked into the distillation tower kettle through the negative pressure of the distillation tower kettle and the raw material storage tank. Open the inlet valve of the column pipe heated by steam in the bottom of the rectification column to heat the raw materials in the bottom of the column, and at the same time open the water inlet valves of the condenser and cooler at the top of the tower. The temperature of the tower bottom is controlled at 100-120 ° C, the temperature of the top of the tower is controlled at 80-100 ° C, and the total reflux is 0.5h, then the product discharge valve is opened, the reflux ratio is controlled at 8:1-15:1, and the fractionated product is carried out. Specific gravity, optical rotation and chromatographic analysis...

Embodiment 3

[0033]The raw material of heavy turpentine is produced in Guangxi, and the main components are: α-pinene 6%, longifolene 58.3%, β-caryophyllene 17%. : First add 0.2-1% activated clay of heavy turpentine quality, stir at 50-60°C for 0.5-1h, filter to remove the activated clay, and then add the filtrate to the raw material storage tank. Use a vacuum pump to discharge the air in the rectification tower, and the vacuum degree in the rectification tower reaches -0.09MPa. Through the negative pressure of the rectification tower tank and the raw material storage tank, the raw material is sucked into the rectification tower tank. Open the inlet valve of the column pipe heated by steam in the bottom of the rectification column to heat the raw materials in the bottom of the column, and at the same time open the water inlet valves of the condenser and cooler at the top of the tower. The temperature of the tower bottom is controlled at 100-120°C, the temperature of the top of the tower is...

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Abstract

The invention discloses a method for continuously separating high-purity longifolene from heavy turpentine. The steps of activated clay decoloration and thermal pretreatment are performed on raw materials, and discharging is performed through the pressure different between a tower kettle and a residual liquid tank under the condition of not cooling a rectifying tower or breaking the vacuum, so that energy is saved, and continuous operation of intermittent distillation is realized. The longifolene content of a longifolene product obtained by using the method is greater than 75 percent, and can be up to 95 percent in maximum.

Description

technical field [0001] The invention relates to the technical field of extracting natural flavors and fragrances, in particular to a method for continuously separating high-purity longifolene from heavy turpentine. Background technique [0002] Heavy turpentine is the main by-product of the production of rosin and turpentine from turpentine, which accounts for about 20-30% of the output of turpentine. The annual output of heavy turpentine in my country is about 10,000 tons, which mainly contains α-pinene, β-pinene, limonene, longifolene, caryophyllene, cedrene, α-santalene, etc. The content of each component varies with the place of origin However, the content of α-pinene is about 6%, the content of longifolene is 13.9-67.4%, and the content of caryophyllene is 0.6-17.9%. Among the high-grade turpentine oil produced by the turpentine factory, α-pinene and β-pinene account for more than 93%, and the price is high and easy to sell; while the heavy turpentine oil whose main com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C13/605C07C13/42C07C7/04C07C7/12
Inventor 谭桂菲陆顺忠孟中磊李秋庭关继华黎贵卿邱米时胜德杨漓杨素华江燕唐宾曾辉梁剑恭苏骊华党中广
Owner GUANGXI FORESTRY RES INST
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