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Method for generating myrcene by cracking beta-pinene

A technology of myrcene and pinene, applied in the field of β-pinene cracking to generate myrcene, can solve the problems of high energy consumption and low output of myrcene production, achieve the effects of reducing cracking temperature, improving production efficiency, and saving energy consumption

Inactive Publication Date: 2014-11-19
WUZHOU SONGHUA AROMATIC CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a method for generating myrcene by cracking β-pinene, so as to solve the problems of high energy consumption and low yield in the production of existing myrcene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Use this method to process myrcene, proceed as follows: put 110 grams of β-pinene mixture with a β-pinene content of 95.1% into the vaporizer, start vacuuming and heating; vacuum degree is controlled at -0.075Mpa~-0.085MPa , heat the temperature to 110°C, and control the evaporation of the material in the vaporizer for 30 minutes to form β-pinene gas. The β-pinene gas enters the mixer and mixes with nitrogen gas 5 times the volume of the β-pinene gas. The temperature is controlled at 90°C; then it enters the preheater for preheating, the mixed gas in the preheater reaches 240°C, and then the mixed gas enters the cracking tube with the catalyst layer under vacuum, so that the catalyst in the catalyst layer enters the mixed In the gas; the catalyst layer here is a zeolite molecular sieve catalyst; the temperature of the cracking tube is divided into three temperature sections along the axial direction of the tube. The vacuum degree of cracking tube: -0.085Mpa. The cleava...

Embodiment 2

[0012] Use this method to process myrcene, proceed as follows: put 530 grams of β-pinene mixture with a β-pinene content of 95.6% into the vaporizer, start vacuuming and heating; vacuum degree is controlled at -0.08Mpa~-0.09MPa , heat the temperature to 90°C, and control the evaporation of the material in the evaporator for 90 minutes to form β-pinene gas. The β-pinene gas enters the mixer and mixes with nitrogen gas that is 3 times the volume of the β-pinene gas. The mixing temperature is controlled at 100°C; the mixed gas in the preheater reaches 230°C, and then the mixed gas enters the cracking tube with a catalyst layer under vacuum, so that the catalyst in the catalyst layer enters the mixed gas; the catalyst layer here is Zeolite molecular sieve catalyst; the temperature of the cracking tube is divided into three temperature sections along the axial direction of the tube. The temperature measuring points set at the three points are 400°C, 440°C, and 500°C, and the vacuum ...

Embodiment 3

[0014] Use this method to process myrcene, proceed as follows: put 1580 grams of β-pinene mixture with a β-pinene content of 96.1% into the vaporizer, start vacuuming and heating; vacuum degree is controlled at -0.09Mpa~-0.098MPa , heating the temperature to 80°C, and controlling the evaporation of the material in the evaporator for 150 minutes to form β-pinene gas. The β-pinene gas enters the mixer and mixes with the nitrogen gas of the same volume as the β-pinene gas. Control at 120°C; the mixed gas in the preheater reaches 250°C, and then the mixed gas enters the cracking tube with a catalyst layer under vacuum, so that the catalyst in the catalyst layer enters the mixed gas; the temperature of the cracking tube is along the tube body The axial direction is divided into three temperature sections and the temperature measurement points are set. The temperatures measured at the three points are 350°C, 400°C, and 560°C, and the vacuum degree of the cracking tube: -0.075Mpa. Th...

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Abstract

The invention discloses a method for producing myrcene by cracking beta-pinene. The method comprises the following steps: vaporizing a beta-pinene mixture of which the beta-pinene content is over 95 percent in vacuum; mixing nitrogen with gas generated after vaporization of the beta-pinene mixture in a ratio of 1:1-5; preheating mixed gas obtained by mixing; performing a cracking reaction on the preheated gas through a cracking tube; and performing two-stage cooling on a cracking product to form liquid, wherein a catalyst layer is arranged on the inner wall of the cracking tube; the temperature of the cracking tube is 350-500 DEG C; the vacuum degree in vacuum vaporization is between -0.075MPa and -0.098MPa; the vaporization temperature is 80-110 DEG C; the mixing temperature is 90-120 DEG C; and the preheating temperature is 120-250 DEG C. Through adoption of the method, the problems of high production energy consumption and low yield in the conventional myrcene can be solved.

Description

technical field [0001] The invention relates to the technical field of processing terpenoids, in particular to a method for generating myrcene by cracking β-pinene. Background technique [0002] With the in-depth research on the use of turpentine to extract synthetic flavors in my country, the demand for downstream users of myrcene is increasing, and the demand is also increasing. The high energy consumption of producing myrcene has been bothering the production cost of myrcene and restricting the production cost of downstream products. When existing enterprises use β-pinene to crack to produce myrcene, the reactants are added to the cracking reaction device for cracking. Generally, the temperature required for cracking is as high as 550°C-650°C, the energy consumption is very high, and the output has not been increased. Processing higher cost. After many years of repeated tests, the factors such as catalytic reaction and temperature have been constantly changed, and the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/21C07C4/08
Inventor 陈伟强李杰鹏廖军杨韶平黄宇平岑潮锋
Owner WUZHOU SONGHUA AROMATIC CHEM
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