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Combination process of large-scale continuous countercurrent extraction and supercritical carbon dioxide extraction of nicotine

A carbon dioxide and countercurrent extraction technology, which is applied in the production of organic chemistry and bulk chemicals, can solve the problems of low production capacity of high-purity nicotine, shorten the time of extraction and extraction, avoid serious pollution, and improve the use efficiency.

Active Publication Date: 2022-05-27
湖南鑫文天生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide large-scale continuous countercurrent extraction and supercritical carbon dioxide extraction nicotine combined process, to solve the problem of low production capacity in the production of high-purity nicotine in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]Embodiment 1: The present embodiment provides a combined process of large-scale continuous countercurrent extraction and supercritical carbon dioxide extraction of nicotine, first tobacco waste, shredded tobacco, dried first, and then pulverized to 50 mesh powder (according to the tobacco special purchase method. It is stipulated that no more than 40 meshes, that is, powders finer than 40 meshes), put the pulverized tobacco waste powder into the material bin of the continuous ultrasonic countercurrent equipment. In this embodiment, ultrasonic waves are used to assist in the extraction of nicotine. Continuous ultrasonic countercurrent extraction equipment, through the continuous ultrasonic countercurrent extraction equipment host to set the speed, adjust the material extraction time to 120 minutes, set the ethanol preparation concentration to 90% (V / V), prepare 90% (V / V) ethanol solution, set 90 The flow rate of the %(V / V) ethanol solution is 8 times the feeding amount of ...

Embodiment 2

[0026] Embodiment 2: This embodiment provides a combined process of large-scale continuous countercurrent extraction and supercritical carbon dioxide extraction of nicotine, and the tobacco waste, in this embodiment, is tobacco stems, dried first, and then pulverized to 60 mesh powder (press Tobacco Special Purchase Law stipulates that the powder should not exceed 40 mesh, that is, powder finer than 40 mesh), put the pulverized tobacco waste powder into the material bin of continuous ultrasonic countercurrent equipment. For alkaline extraction, turn on the continuous ultrasonic countercurrent extraction equipment, set the rotation speed through the main machine of the continuous countercurrent extraction equipment, adjust the material extraction time to 90 minutes, set the ethanol preparation concentration to 88% (V / V), and prepare 88% (V / V) ethanol solution , set the flow rate of 88% (V / V) ethanol solution to be 5 times of the tobacco waste feeding amount, turn on the ultrason...

Embodiment 3

[0027] Example 3: This example provides a combined process of large-scale continuous countercurrent extraction and supercritical carbon dioxide extraction of nicotine. Tobacco waste, in this example, tobacco leaf powder, is first dried, and then pulverized to 80 mesh powder (According to the special tobacco purchase law, the powder should not exceed 40 mesh, that is, the powder finer than 40 mesh), put the pulverized tobacco waste powder into the material bin of the continuous ultrasonic countercurrent equipment. Carry out nicotine extraction, turn on the continuous ultrasonic countercurrent extraction equipment, set the rotation speed through the main machine of the continuous countercurrent extraction equipment, adjust the material extraction time to 100 minutes, set the ethanol solution preparation concentration to 92% (V / V), and prepare 92% (V / V) ) ethanol solution, set the flow rate of 92% (V / V) ethanol solution to be 6 times of the tobacco waste feeding amount, open the u...

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Abstract

The invention discloses a combined process of large-scale continuous countercurrent extraction and supercritical carbon dioxide extraction of nicotine, which is carried out according to the following steps: A, drying tobacco waste such as tobacco powder, waste shredded tobacco or tobacco stems, and then crushing them into 40-200 mesh powder B. Using a high-concentration ethanol solution as the extraction medium, using continuous countercurrent extraction equipment to extract nicotine in the tobacco waste powder; C. Concentrating the nicotine extract extracted in step B into a nicotine-containing tobacco paste; D. Put the tobacco paste in step C into supercritical carbon dioxide extraction equipment for nicotine extraction to obtain the primary product of nicotine, and then concentrate and purify the primary product of nicotine to obtain a nicotine product with higher purity. The nicotine-containing tobacco paste needs to be loaded with a solid powder carrier before being placed in the supercritical carbon dioxide extraction equipment. The supercritical carbon dioxide extraction equipment includes three extraction kettles, a separation kettle one and a separation kettle two. The volume is 1000L.

Description

【Technical field】 [0001] The invention relates to the technical field of nicotine production, in particular to a combined process of large-scale continuous countercurrent extraction and supercritical carbon dioxide extraction of nicotine. 【Background technique】 [0002] Nicotine, also known as nicotine, is an important alkaloid in tobacco with strong physiological activity. Pure nicotine is a colorless or light yellow oily liquid at room temperature, with a boiling point of 246.2°C (0.97 MPa), levorotatory, specific optical rotation=-166.39°~-168.5°, strong spicy taste, deliquescence, It is unstable in nature, and is easily oxidized to oxidized nicotine in the air or sunlight, resulting in dark brown. It can form hydrate with water below 60°C, is easily soluble in organic solvents such as alcohol, ether, chloroform and petroleum ether, and can be evaporated together with water vapor without decomposing. Nicotine can react with many acids to form salts, most of which are so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D401/04
CPCC07D401/04Y02P20/54
Inventor 邓小兵胡旺顺杨德顺苏晓霞
Owner 湖南鑫文天生物科技有限公司
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