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A kind of method for preparing camphor by catalytic pyrolysis of camphor leaves

A technology of catalytic pyrolysis and camphor leaves, applied in chemical instruments and methods, physical/chemical process catalysts, separation/purification of carbonyl compounds, etc., can solve low efficiency, high production costs, raw material solvents and catalysts Environmental pollution and other problems, to achieve the effect of simple separation and purification and high catalytic activity

Active Publication Date: 2018-06-26
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Chinese Patent Application No. 90107669.4 and Chinese Patent Application No. 201510714006.X have reported the method of refining camphor through isoborneol, the non-extensive nature of its raw materials and the large amount of environmental pollution caused by solvents and catalysts in the refining process lead to high production costs ,low efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Get 10g Cinnamomum camphora leaf (particle diameter is 0.1-0.3mm) as raw material, take the metal palladium of activated carbon load 5% as catalyzer (catalyst is ground to particle diameter and be about 0.2mm), the quality of Cinnamomum camphora leaf and catalyzer The ratio was 1:2, and then the mixture was pyrolyzed at 350° C. under a nitrogen atmosphere for 15 s, and the yield of the liquid product obtained was 33.9%. The content of camphor was analyzed by gas chromatography, and the yield of camphor was calculated to be 2.7%.

Embodiment 2

[0022] Get 10g Cinnamomum camphora leaf (particle diameter is 0.1-0.3mm) as raw material, take the metal palladium of activated carbon load 4% as catalyzer (catalyst is ground to particle diameter and be about 0.2mm), the quality of Cinnamomum camphora leaf and catalyzer The ratio was 1:1, and then the mixture was pyrolyzed at 330° C. under a nitrogen atmosphere for 15 seconds to obtain a liquid product yield of 29.3%. The content of camphor was analyzed by gas chromatography, and the yield of camphor was calculated to be 2.3%.

Embodiment 3

[0024] Get 10g camphor leaf with a crown (the particle diameter is 0.1-0.3mm) as raw material, the platinum-rhodium (the content of platinum and rhodium is respectively 2.5%) is catalyzer (the catalyst is ground to particle diameter and is about 0.2mm) with activated carbon load 5% ), the mass ratio of Cinnamomum camphora leaves and catalyst is 1: 1, then the mixture is pyrolyzed for 20s at 320° C. under a nitrogen atmosphere, and the liquid product yield obtained is 29.8%, and the content of camphor is analyzed by gas chromatography, It is calculated that the yield of camphor is 2.1%.

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PUM

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Abstract

The invention belongs to the field of utilization of biomass energies, and particularly relates to a method for preparing 1,7,7-trimethyldicyclo[2.2.1]heptane-2-one (camphor) by catalytically pyrolyzing Cinnamomum camphora leaves by using a noble-metal-base catalyst. The method comprises the following steps: mechanically mixing the noble-metal-base catalyst and Cinnamomum camphora leaves, carrying out quick pyrolysis at 260-400 DEG C under oxygen-free conditions, and condensing the pyrolytic gas to obtain the camphor-rich liquid product. The yield of the camphor and the purity of the camphor 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 camphor by catalyzing and pyrolyzing camphor leaves with a noble metal-based catalyst. Background technique [0002] 1,7,7-Trimethylbicyclo[2.2.1]heptane-2-one (camphor) is a camphor compound and one of the components of camphor leaves. The structural formula of camphor is shown below Its unique chemical structure makes it widely used: mainly including (1) chemical industry, which can be used as smokeless gunpowder, nitrocellulose, plasticizer, etc.; (2) medicine, which can be used to relieve summer heat, refresh the brain and strengthen the stomach Oral Chinese patent medicine preparations, etc., as well as pharmaceutical intermediates such as camphorsulfonic acid used in the production of central nervous stimulants; (3) daily necessities, used as insect repellents. Camphor is also the main raw material for the production of brom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/78C07C49/437B01J23/44B01J23/46
CPCY02P20/584
Inventor 陆强叶小宁李文涛胡斌王昕董长青
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)