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Method for catalyzing veratryl alcohol to convert into 3,4-dimethoxytoluene

A technology of dimethoxytoluene and veratrol, applied in chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the problems of less research on the hydrodeoxygenation and hydrogenation of veratrol, Achieve the effects of high conversion rate, good selectivity and safe operation

Active Publication Date: 2019-11-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the hydrodeoxygenation and hydrogenation of veratrol

Method used

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  • Method for catalyzing veratryl alcohol to convert into 3,4-dimethoxytoluene
  • Method for catalyzing veratryl alcohol to convert into 3,4-dimethoxytoluene
  • Method for catalyzing veratryl alcohol to convert into 3,4-dimethoxytoluene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Using 10 g of biomass resource chitosan as a carbon source, roasting at 600 °C for 8 hours to prepare CN 0.28 ; Make CN by ultrasonic disperser 0.28 Uniformly dispersed in water; using 0.2 mmol palladium acetate as palladium source, it was uniformly dispersed in CN 0.28 Suspension to obtain a mixture; use 300W of ultraviolet light to carry out photocatalytic reduction of inactive palladium for 4h to obtain CN with active palladium 0.28 Suspension; the suspension is separated by centrifugation, and the solid phase is vacuum-dried in a vacuum desiccator to obtain 2wt% palladium Pd / CN 0.28 . Weigh 0.05g 2wt% palladium Pd / CN 0.28 As a catalyst, after mixing 2mL of veratrol in the reaction vessel, add 38mL of isopropanol as solvent and hydrogen donor;

[0034] (2) Disperse the reactor in an ultrasonic disperser for 1 minute, replace the air in the reactor with argon for 5 times, tighten the air valve, set the reaction temperature to 180°C, the reaction pressure to 1....

Embodiment 2

[0038] (1) Using 10 g of biomass resource chitosan as a carbon source, roasting at 600 °C for 8 hours to prepare CN 0.28 ; Make CN by ultrasonic disperser 0.28 Uniformly dispersed in water; using 0.2 mmol palladium acetate as palladium source, it was uniformly dispersed in CN 0.28 Suspension to obtain a mixture; use 300W ultraviolet light to carry out photocatalytic reduction of inactive palladium for 4h to obtain CN loaded with active palladium 0.28 Suspension; the suspension is separated by centrifugation, and the solid phase is vacuum-dried in a vacuum desiccator to obtain the Pd / CN of 5 wt% palladium 0.28 . Weigh 0.05 g of 5 wt% palladium in Pd / CN 0.28As a catalyst, after mixing 2mL of veratrol in the reaction vessel, add 38mL of isopropanol as solvent and hydrogen donor;

[0039] (2) Disperse the reactor in an ultrasonic disperser for 1 minute, replace the air in the reactor with argon 5 times, tighten the air valve, set the reaction temperature to 230°C, the reaction...

Embodiment 3

[0043] (1) Using 10 g of biomass resource chitosan as a carbon source, roasting at 600 °C for 8 h to prepare CN 0.28 ; Make CN by ultrasonic disperser 0.28 Uniformly dispersed in water; using 0.2 mmol palladium acetate as palladium source, it was uniformly dispersed in CN 0.28 Suspension to obtain a mixture; use 300W ultraviolet light to carry out photocatalytic reduction of inactive palladium for 4h to obtain CN loaded with active palladium 0.28 suspension; the suspension is separated by centrifugation, and the solid phase is vacuum-dried in a vacuum desiccator to obtain the Pd / CN of 10 wt% palladium 0.28 . Weigh 0.05 g of 10 wt% palladium in Pd / CN 0.28 As a catalyst, after mixing 2mL of veratrol in the reaction vessel, add 38mL of isopropanol as solvent and hydrogen donor;

[0044] (2) Disperse the reactor in an ultrasonic disperser for 1 minute, replace the air in the reactor with argon for 5 times, tighten the air valve, set the reaction temperature to 280°C, the react...

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Abstract

The invention discloses a method for catalyzing veratryl alcohol to convert into 3,4-dimethoxytoluene, belonging to the field of preparing platform compounds by hydrogenation deoxygenation of the veratryl alcohol. In the method, the veratryl alcohol is taken as a substrate, a palladium-loaded carbon material is taken as a catalyst, and a low-carbon alcohol is taken as a solvent and a hydrogen donor. In a high temperature and high pressure reaction system, the catalyst reacts with the substrate to generate the 3,4-dimethoxytoluene. The method converts the veratryl alcohol into the 3,4-dimethoxytoluene, uses the low-carbon alcohol as the solvent and the hydrogen source, is convenient to operate, safe and stable, economical and environment-friendly, has the advantages of high conversion rateof the veratryl alcohol and good selectivity of the 3,4-dimethoxytoluene, and has the prospect of large-scale application in industry.

Description

technical field [0001] The invention relates to the field of preparation of platform compounds by hydrogenation and deoxygenation of veratrol, in particular to a method for catalyzing the conversion of veratrol into 3,4-dimethoxytoluene. Background technique [0002] The conversion of lignocellulosic biomass into biofuels and platform chemicals is a current research hotspot, and it is also one of the important topics for long-term research in the future. Lignin is the second largest biomass component after cellulose in plant fiber raw materials, and its content accounts for about 30wt% of non-fossil organic carbon content. It is an important raw material for the production of renewable energy and platform chemicals. Phenolic derivatives are the main intermediate products of bio-petroleum and most chemicals. In the production process of 3,4-dimethoxytoluene, almost all benzene series can be obtained from petroleum-derived benzene, and the demand for 3,4-dimethoxytoluene acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/18C07C43/205B01J27/24
CPCB01J27/24C07C41/18C07C43/2055
Inventor 付时雨张海川
Owner SOUTH CHINA UNIV OF TECH
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