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Method for synthesizing cyclohexane through 2,6-dimethoxyphenol

A technology of dimethoxyphenol and cyclohexane, applied in chemical instruments and methods, producing hydrocarbons from oxygen-containing organic compounds, carbon compound catalysts, etc., to achieve good reusability

Active Publication Date: 2021-05-25
DALIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no report on the catalytic reaction of 2,6-dimethoxyphenol hydrodeoxygenation using NiO or Pt / NiO as a catalyst

Method used

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  • Method for synthesizing cyclohexane through 2,6-dimethoxyphenol
  • Method for synthesizing cyclohexane through 2,6-dimethoxyphenol
  • Method for synthesizing cyclohexane through 2,6-dimethoxyphenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of NiO or Pt / NiO catalyst by deposition precipitation method: prepare a solution with a nickel nitrate concentration of 0.5mol / L and a platinum chloride concentration of 0.005mol / L, and add it dropwise to a 1mol / L NaOH solution while stirring, and Stir at room temperature for 2 h, then filter and wash the filter cake with deionized water until the filtrate is neutral. The filter cake was dried at 380K for 12h, and finally the catalyst was calcined in a muffle furnace at 623K for 2h, dried and sealed for future use.

[0028] Take 0.05g of the catalyst and put it in the high-pressure batch reactor, and then add 0.50g of 2,6-dimethoxyphenol and 10ml of n-decane into the high-pressure batch reactor. The reactor was sealed, purged with nitrogen for 3 times, and then 3.0 MPa hydrogen was introduced. The temperature of the reactor was raised to 573K, and the stirring rate was 700rpm to continue the reaction for 2h.

Embodiment 2

[0030] The reaction time was 4h, and the catalyst preparation method, feed amount and reaction conditions were basically the same as in Example 1.

Embodiment 3

[0032] The reaction temperature is 623K, and the catalyst preparation method, feed amount and reaction conditions are basically the same as in Example 1.

[0033] The reaction result of embodiment 1~3 is shown in table 1.

[0034] Table 1. Embodiment 1~3 reaction result summary table

[0035]

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PUM

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Abstract

The invention relates to the field of organic synthesis, and discloses a method for synthesizing cyclohexane through 2,6-dimethoxyphenol. According to the method disclosed by the invention, the Pt / NiO catalyst is used for hydrodeoxygenation treatment of 2,6-dimethoxyphenol for the first time, and the synthesis of the final product, namely cyclohexane is realized. According to the method provided by the invention, the product is single, and the selectivity of cyclohexane in the final reaction product is close to 100% by using the Pt / NiO catalyst; and the reaction temperature is controlled to be 373 to 873K, and 2,6-dimethoxyphenol can be quickly and completely converted. The Pt / NiO catalyst provided by the invention has good reusability in an intermittent kettle reaction, and can operate on a fixed bed for a long time.

Description

technical field [0001] The invention relates to the field of organic synthesis, in particular to a method for synthesizing the final product cyclohexane through 2,6-dimethoxyphenol. Background technique [0002] Alkanes are important intermediates in chemical and pharmaceutical synthesis. The research on obtaining the corresponding saturated alkanes through the continuous hydrogenation of aromatic compounds has attracted much attention in the world industry. Both phase transfer catalysis and homogeneous catalysis can realize this important process, while heterogeneous catalysts have been widely used in this hydrogenation field due to their convenient separation and easy regeneration. [0003] 2,6-dimethoxyphenol, also called syringyl alcohol, is a structural monomer formed after lignin cracking. Because it can be obtained through biotransformation, syringyl alcohol has a large content and a wide range in nature, and can replace petroleum as a biofuel or a raw material for c...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C13/18B01J23/755B01J23/89B01J37/02B01J37/03
CPCC07C1/20B01J23/755B01J23/892B01J37/0201B01J37/03C07C2601/14C07C2523/755C07C2523/89C07C13/18Y02P20/52
Inventor 毛璟博刘春雨周锦霞
Owner DALIAN UNIVERSITY
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