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A kind of method for preparing diene nicotine by catalytic pyrolysis of tobacco

A technology for catalytic pyrolysis and diene nicotine, which is applied in the direction of chemical instruments and methods, molecular sieve catalysts, heterogeneous catalyst chemical elements, etc., can solve problems such as impracticability, low yield, and difficulty in separating and purifying diene nicotine , to achieve the effect of promoting the formation, highly dispersed and inhibiting the formation of nicotine

Active Publication Date: 2017-02-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the conventional pyrolysis process of tobacco, diene nicotine is difficult to produce as the target product or the yield is extremely low, which makes it difficult or even impossible to separate and purify diene nicotine based on conventional pyrolysis liquid products

Method used

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  • A kind of method for preparing diene nicotine by catalytic pyrolysis of tobacco

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 10g of air-dried tobacco (0.1-0.3mm in particle size) as a raw material, use 10% metal palladium supported by activated carbon as a catalyst (the catalyst is ground to a particle size of about 0.2mm), and the mass ratio of air-dried tobacco to catalyst is 1:2. Then the mixture was pyrolyzed at 350° C. for 15 seconds under a nitrogen atmosphere, and the yield of liquid product obtained was 44.2%. The content of diene nicotine was analyzed by gas chromatography, and the yield of diene nicotine was calculated to be 8.3%.

Embodiment 2

[0022] Take 10g of air-dried tobacco (0.1-0.3mm in particle size) as a raw material, use 5% metal palladium loaded on activated carbon as a catalyst (the catalyst is ground to a particle size of about 0.2mm), and the mass ratio of air-dried tobacco to catalyst is 1:1. Then the mixture was pyrolyzed at 330° C. for 15 seconds under a nitrogen atmosphere, and the yield of liquid product obtained was 42.8%. The content of diene nicotine was analyzed by gas chromatography, and the yield of diene nicotine was calculated to be 6.8%.

Embodiment 3

[0024] Get 10g of flue-cured tobacco (the particle diameter is 0.1-0.3mm) as raw material, with SBA-15 loading 5% platinum-rhodium (the content of platinum and rhodium is each 2.5%) as catalyst (the catalyst is ground to a particle diameter of about 0.2mm), The mass ratio of flue-cured tobacco and catalyst is 1:1, and then the mixture is pyrolyzed at 320°C under nitrogen atmosphere for 20s, and the yield of liquid product obtained is 39.9%. The content of diene nicotine is analyzed by gas chromatography, and the calculation shows that The yield of diene nicotine was 6.6%.

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Abstract

The invention belongs to the field of utilization of biomass energy, and particularly relates to a method for preparing 3-(1-methyl-2-pyrryl)pyridyl(nicotyrine) from tobacco by catalytic pyrolysis by using a noble-metal-base catalyst. The method comprises the following steps: mechanically mixing the noble-metal-base catalyst and tobacco, carrying out flash pyrolysis at 260-450 DEG C under oxygen-free conditions, and condensing the pyrolysis gas to obtain the liquid product containing rich nicotyrine. The yield of the nicotyrine and the purity of the nicotyrine in the liquid product are higher. Besides, the catalyst has stable properties, and can be recycled many times after separation and recovery.

Description

technical field [0001] The invention belongs to the field of utilization of biomass energy, and in particular relates to a method for preparing diene nicotine by catalyzing and pyrolyzing tobacco with a noble metal-based catalyst. Background technique [0002] 3-(1-methyl-2-pyrrole)pyridine (diene nicotine) is a compound of pyridine and tetrahydropyrrole formed during the pyrolysis of tobacco. The structural formula of diene nicotine is shown below: [0003] [0004] The unique chemical structure of diene nicotine makes it have broad application prospects in the fields of fine chemicals, pharmaceuticals, organic synthesis, and pesticides. However, in the conventional pyrolysis process of tobacco, diene nicotine is difficult to produce as the target product or the yield is extremely low, which makes it difficult or even impossible to separate and purify diene nicotine based on conventional pyrolysis liquid products. In order to obtain diene nicotine, appropriate methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D401/04B01J23/44B01J23/46
CPCB01J23/44B01J29/0325B01J2229/20B01J2523/824C07D401/04
Inventor 陆强叶小宁陈晨李文涛董长青孙帅檀勤良
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)