Process and device for producing myrcene by thermal cracking of beta-pinene

A technology of thermal cracking and laurelne, which is used in organic chemistry, heterogeneous hydrocarbons and other directions, which can solve the problems of failure to achieve long -term continuous production, complex equipment composition, and large energy consumption. The effect of simple and gasification temperature

Pending Publication Date: 2018-01-19
广东松林香料有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] In order to solve technical defects such as complex equipment structure, easy coking, high energy consumption, and inability to realize long-term continuous production existing in the existing process and equipment, the present invention provides a process for producing myrcene by pyrolysis of β-pinene and its device. Compared with

Method used

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  • Process and device for producing myrcene by thermal cracking of beta-pinene

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Turn on the vacuum system to 0.07MPa; set the metering feed pump value to 100kg / h; set the power of the ultrasonic atomization device to 500W, and set its frequency to 30kHz; turn on the heating system of the vaporizer and cracking tube, and the temperature of the vaporizer is 155°C , the cracking tube temperature is 510°C. β-pinene enters the gasifier from the material storage tank through the ultrasonic atomizing nozzle, and enters the cracking tube to react after gasification, and the reaction liquid enters the product collector after condensation. When the liquid level reaches 2 / 3 of the collector, replace another collector, release the vacuum of the collector, and release the material. The mass yield of myrcene is 95.6%, and the purity is 79.6%.

Embodiment 2

[0028] The frequency of the ultrasonic atomization device was set to 15 kHz, and other process conditions were the same as in Example 1. The mass yield of myrcene is 95.2%, and the purity is 79.2%.

Embodiment 3

[0030] The gasifier temperature is set to be 150° C., and the other process conditions are the same as in Example 1. The mass yield of myrcene was 95.0%, and the purity was 78.9%.

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Abstract

The invention discloses a process and device for producing myrcene by thermal cracking of beta-pinene. According to the flowing direction of material, the device is mainly composed of a raw material storage tank, a metering and feeding pump, an ultrasonic atomization gasification device, an inductive coupling thermal cracking tube, a condenser and a product collector which are sequentially connected in series, wherein an ultrasonic atomization nozzle is arranged at the top of the ultrasonic atomization gasification device; and the ultrasonic atomization nozzle is connected with an ultrasonic atomizer controller. At ordinary pressure or low pressure, beta-pinene is subjected to ultrasonic atomization treatment and becomes uniformly dispersed micron-scale small droplets, complete atomizationgasification is realized at relatively low temperature, and a gasified material rapidly enters the inductive coupling thermal cracking tube and carries out rapid thermal cracking reaction, thus generating myrcene.

Description

technical field [0001] The invention relates to a process and a device for producing myrcene by thermal cracking of β-pinene, in particular to a process and a device for producing myrcene from β-pinene through ultrasonic-assisted atomization gasification-continuous thermal cracking. Background technique [0002] Myrcene is an important natural fragrance, present in essential oils such as bay oil, verbena oil, hop oil, and cork oil. The chemical name is 7-methyl-3-methylene-1,6-octadiene. There are three double bonds in the molecular structure, two of which are conjugated double bonds. Important raw materials for fragrance products, such as ambroxone, geraniol, nerol, linalool, neoliral, neolilyl, citral and methyl citral, etc. The content of myrcene in natural essential oils is very small, and relying on myrcene from natural essential oils is far from meeting the needs of the synthetic fragrance industry. Therefore, the industrial use of myrcene mainly relies on β-pinene de...

Claims

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Application Information

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IPC IPC(8): C07C5/31C07C11/21
Inventor 蓝宗永杨毅
Owner 广东松林香料有限公司
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