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Preparation method of Na-gamma-Al2O3 catalyst and application of Na-gamma-Al2O3 catalyst in catalytic synthesis of anisole

A catalyst and anisole technology, applied in the field of anisole synthesis, can solve the problems of low catalytic activity, unstable catalytic activity, long process route, etc., and achieve high catalytic efficiency, good industrial application prospects, and no environmental pollution Effect

Pending Publication Date: 2021-01-12
YULIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a kind of Na-γ-Al 2 o 3 The preparation method of catalyst, to solve the problems existing in the prior art

Method used

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  • Preparation method of Na-gamma-Al2O3 catalyst and application of Na-gamma-Al2O3 catalyst in catalytic synthesis of anisole
  • Preparation method of Na-gamma-Al2O3 catalyst and application of Na-gamma-Al2O3 catalyst in catalytic synthesis of anisole
  • Preparation method of Na-gamma-Al2O3 catalyst and application of Na-gamma-Al2O3 catalyst in catalytic synthesis of anisole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Take γ-Al 2 o 3 10.2417g (0.1mol) was added to the muffle furnace and calcined at 550°C for 6 hours to activate γ-Al 2 o 3 , when the temperature of the muffle furnace drops to room temperature, take out the γ-Al 2 o 3 .

[0030] 2. Set N 2 Pass through the autoclave to purify for 10 minutes and then add the activated γ-Al 2 o 3 And keep purging, take CH 3 OH13mL (0.33mol) was added in the autoclave, and metal sodium 4.6956g (0.2mol) was added, and CH 3 After the reaction between OH and sodium metal is completed, 5g CaO is added to absorb water and improve the alkalinity of the catalyst; remove the N 2 Purge and close the lid of the autoclave, stir and react at 350°C at 650 rpm for 4 hours to obtain gray powder Na-γ-Al 2 o 3 catalyst.

[0031] Depend on figure 1 It can be seen that the activated γ-Al 2 o 3 The surface morphology is irregular small particles, and the pore size is relatively uniform, and the surface structure is relatively regular. The ...

Embodiment 2

[0033] 1. Take γ-Al 2 o 3 10.2417g (0.1mol) was added to the muffle furnace and calcined at 500°C for 6 hours to activate γ-Al 2 o 3 , when the temperature of the muffle furnace drops to room temperature, take out the γ-Al 2 o 3 .

[0034] 2. Set N 2 Purge the autoclave for 10 minutes and then add activated γ-Al 2 o 3 And keep purging, take CH 3 OH13mL (0.32mol) was added in the autoclave, and metal sodium 4.1425g (0.18mol) was added, and CH 3 After the reaction between OH and sodium metal is completed, 5g CaO is added to absorb water and improve the alkalinity of the catalyst; remove the N 2 Purge and close the lid of the autoclave, stir and react at 400°C at 650 rpm for 4 hours to obtain gray powder Na-γ-Al 2 o 3 catalyst.

Embodiment 3

[0036] 1. Take γ-Al 2 o 3 10.2417g (0.1mol) was added to the muffle furnace and calcined at 550°C for 5 hours to activate γ-Al 2 o 3 , when the temperature of the muffle furnace drops to room temperature, take out the γ-Al 2 o 3 .

[0037] 2. Set N 2 Purge the autoclave for 10 minutes and then add activated γ-Al 2 o 3 And keep purging, take CH 3 OH12mL (0.3mol) was added in the autoclave, and metal sodium 3.4536g (0.15mol) was added, and CH 3 After the reaction between OH and sodium metal is completed, 5g CaO is added to absorb water and improve the alkalinity of the catalyst; remove the N 2 Purge and close the lid of the autoclave, stir and react at 400°C at 600 rpm for 4.5 hours to obtain gray powder Na-γ-Al 2 o 3 catalyst.

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Abstract

The invention discloses a preparation method of a Na-gamma-Al2O3 catalyst and an application of Na-gamma-Al2O3 catalyst in catalytic synthesis of anisole. The preparation method comprises the following steps: calcining gamma-Al2O3 at a high temperature to activate gamma- Al2O3, and then stirring the activated gammaAl2O3, CH3OH and Na in a molar ratio of (0.5-1.5): (2.5-3.5): (1-3) in a reaction kettle at the temperature of 350-400 DEG C to react for 4-4.5 hours to obtain the Na-gamma-Al2O3 catalyst. The Na-gamma-Al2O3 catalyst is prepared by adopting a one-step method, the synthesis steps aresimple and rapid, the obtained catalyst has super-strong alkalinity, is good in activity and high in catalytic efficiency when being used for catalyzing dimethyl carbonate and phenol to react to prepare anisole, the conversion rate of phenol can reach 80% or above, and the selectivity of anisole can basically reach 100%. The catalyst can be repeatedly used and regenerated and has a good industrialapplication prospect.

Description

technical field [0001] The invention belongs to the technical field of anisole synthesis and relates to a Na-γ-Al 2 o 3 The preparation method of the catalyst, and the application of the catalyst to catalyze the synthesis of anisole. Background technique [0002] Anisole, also known as anisole and methoxybenzene, is the most basic aromatic ether compound. Anisole is prone to electrophilic substitution reactions, so it is widely used in the synthesis of aromatic compounds containing methoxy, and is an intermediate in the synthesis of various drugs and organic chemicals; because of its special fragrance, it is usually used as soap Or detergent additive; because of its large dielectric constant and high boiling point, it can be used as an excellent general reagent, initiator, solvent, thermostat filler, etc.; in addition, because it can increase the octane number of gasoline, it can also be used as a gasoline additive Instead of methyl tert-butyl ether. In recent years, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04B01J21/04B01J37/08C07C41/16C07C43/205
CPCB01J23/04B01J21/04B01J37/08C07C41/16C07C43/205Y02P20/584
Inventor 张璐舒军政张智芳高雯雯冯利军王兴富
Owner YULIN UNIV