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Method for preparing isoeugenol by virtue of catalytic pyrolysis of biomass

A technology for catalytic pyrolysis and isoeugenol, applied in chemical instruments and methods, physical/chemical process catalysts, ether preparation, etc., can solve the problems of complex composition structure, complex liquid product composition, and difficulty in extracting isoeugenol, etc. Achieve the effect of reducing production costs, simple composition, and low requirements for equipment and reaction conditions

Active Publication Date: 2015-03-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complexity of its composition and structure, the composition of liquid products obtained by conventional rapid pyrolysis of biomass is extremely complex, including hundreds of organic compounds (acids, aldehydes, ketones, anhydrosugars, furans, phenols, hydrocarbons, and fatty acids, etc.)
Isoeugenol is generally only one of the products in a very small amount (even no isoeugenol can be detected in some pyrolysis liquid products), and it is difficult to directly extract isoeugenol from biomass pyrolysis oil by existing methods

Method used

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  • Method for preparing isoeugenol by virtue of catalytic pyrolysis of biomass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 0.65g of ruthenium chloride trihydrate (RuCl 3 ·3H 2 O) be dissolved in 100mL deionized water, stir until completely dissolved, add 10.00g SBA-15 to the solution, slowly drip ammonia water (25%) into the mixed solution under stirring until the pH reaches 10, and then continue to Stir at room temperature for 12h. After the stirring, the solid was filtered, dried at 105°C for 4h, and then reduced at 280°C for 3h in a hydrogen (6% hydrogen, nitrogen for the rest) atmosphere (programmed temperature was 2°C / min). 9.99 g of Ru / SBA-15 with a Ru loading of 2% was obtained.

[0031] Take 3g of the above catalyst, grind it to a particle size of less than 0.5mm, take 15g of silver fir as a raw material, grind it to a particle size of less than 0.3mm, mix the two mechanically, and rapidly pyrolyze them at 280°C for 20s under a nitrogen atmosphere to obtain a liquid product Yield 34.5%, wherein the content of isoeugenol is analyzed by gas chromatography, calculates that the...

Embodiment 2

[0033] Take 5g of the catalyst in the above example 1, grind it to a particle size of less than 0.5mm, take 15g of bald fir as a raw material, grind it to a particle size of less than 0.3mm, mix the two mechanically, and then quickly pyrolyze it at 330°C under a nitrogen atmosphere for 15s , the liquid yield 41.7% that obtains, analyze the content of isoeugenol wherein by gas chromatography, calculate that the productive rate of isoeugenol is 2.3%; The content of isoeugenol in the organic liquid product (not containing water) is 11.7% %.

Embodiment 3

[0035] Take by weighing 1.62g of rhodium chloride trihydrate (RhCl 3 ·3H 2 O) Dissolve in 100mL deionized water, stir until completely dissolved, add 9.80g of activated carbon to the solution, slowly drop ammonia (25%) into the mixed solution under stirring until the pH reaches 9, and then continue to cool at room temperature Stir for 12h. After the stirring, the solid was filtered, dried at 100°C for 3h, and then reduced at 280°C for 3h in a hydrogen (6% hydrogen, nitrogen for the rest) atmosphere (programmed temperature was 2°C / min). 10.11 g of Rh / C were obtained with a Rh loading of 5%.

[0036] Take 3g of the above catalyst, grind it to a particle size of less than 0.5mm, take 15g of cedar wood as a raw material, grind it to a particle size of less than 0.3mm, mix the two mechanically, and then rapidly pyrolyze it at 300°C for 15s under a nitrogen atmosphere to obtain a liquid product Yield 36.4%, wherein the content of isoeugenol is analyzed by gas chromatography, calc...

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Abstract

The invention belongs to the field of biomass energy and particularly relates to a method for preparing isoeugenol by virtue of catalytic pyrolysis of biomass through a ruthenium or rhodium catalyst. The method comprises the following steps of mechanically mixing the raw material biomass and the ruthenium or rhodium catalyst, rapidly pyrolyzing under oxygen-free conditions at 250-400 DEG C and condensing the pyrolyzed gas to obtain an isoeugenol-enriched liquid product, simply separating and purifying the liquid product to obtain higher-purity isoeugenol. In addition, the inexpensive and widely available biomass is used as the raw material in the method disclosed by the invention, and thus the production cost of isoeugenol can be significantly decreased.

Description

technical field [0001] The invention belongs to the field of utilization of biomass energy, and in particular relates to a method for preparing isoeugenol by catalyzing and pyrolyzing biomass with a ruthenium or rhodium catalyst. Background technique [0002] Isoeugenol, also known as 4-propenyl-2-methoxyphenol, CAS number: 97-54-1, has the following structure: [0003] [0004] Isoeugenol is a kind of light yellow liquid with clove smell, which is widely used in the preparation of essential oils such as ylang ylang and nutmeg, as well as food flavors with raspberry, peach, spicy and clove flavors, and can also be used as raw materials to synthesize flavors Lansu, vanillin, etc. At present, the preparation method of isoeugenol mainly uses syringic acid to undergo isomerization of side chain double bonds under the action of concentrated lye, thereby obtaining the target product. The raw material syringic acid used in this method is not a bulk chemical, and the price is r...

Claims

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Application Information

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IPC IPC(8): C07C43/23C07C41/01B01J29/035B01J23/46
CPCB01J23/464B01J29/0325B01J2229/18B01J2523/822C07C41/01C07C43/23
Inventor 陆强张智博陈晨李文涛董长青张芸
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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