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Catalyst of composite oxides of copper and manganese and application

A kind of composite oxide, catalyst technology

Inactive Publication Date: 2005-08-31
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of this method is that the selectivity of benzaldehyde is better, and the disadvantage is that the temperature required for the reaction is high, the equipment requirements are harsh, and the pollution to the environment is relatively serious in addition.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: preparation and activity evaluation of catalyst A

[0017] 19.95g Cu(Ac) 2 ·H 2 O and 24.51 g Mn(Ac) 2 4H 2 O was dissolved in 500mL deionized water and stirred to dissolve; take Na 2 CO 3 21.2g, heated to 50°C with 500mL deionized water to dissolve it; transfer the metal salt solution to a 2000mL beaker, add the sodium carbonate solution dropwise under stirring conditions, and stir and age for 3 hours after obtaining the precipitate; The precipitate was filtered, washed with 500 mL of deionized water for 3 times, and dried at 120°C; calcined in a quartz tube at 500°C with oxygen for 2 hours to obtain catalyst A.

[0018] Put 1.00 g of catalyst A in a 0.5-liter high-pressure reactor, and use a pipette to measure 50 mL of toluene into the autoclave; seal the autoclave, heat the autoclave to 190 ° C within 60 minutes, and carry out the reaction with oxygen , the reaction time is 120 minutes. After the reaction was completed, the temperature of the rea...

Embodiment 2

[0019] Example 2: Preparation and activity of catalyst B

[0020] 19.95gCu(Ac) 2 ·H 2 O and 24.51 g Mn(Ac) 2 4H 2 O was placed in a 1000mL beaker, and 500mL deionized water was added and stirred to dissolve; Na 2 CO 3 21.2g was placed in a 2000mL beaker, 500mL of deionized water was added, and then heated to 50°C to dissolve it; the metal salt solution was added dropwise to the sodium carbonate solution under stirring conditions, and after precipitation was obtained, it was stirred and aged for 3 hours; The resulting precipitate was filtered, washed three times with 500 mL of deionized water, and dried at 120° C.; calcined in a quartz tube at 500° C. for 2 hours with oxygen to obtain catalyst B. Carry out the liquid-phase oxidation reaction of toluene by the reaction condition and reaction method among the embodiment 1, reaction result is listed in Table 1.

Embodiment 3

[0021] Embodiment 3: the preparation of catalyst C

[0022] 19.95gCu(Ac) 2 ·H 2 O was placed in a 1000mL beaker, 500mL of deionized water was added and stirred to dissolve, then 24.51g of Mn(Ac) was added 2 4H 2 O, continue stirring to dissolve it; take Na 2 CO 3 Put 21.2g in a 1000mL beaker, add 500mL deionized water, then heat to 50°C to dissolve; add 100mL water into a 2000mL three-necked flask, and drop the metal salt solution and sodium carbonate solution into it at the same time while stirring , keep the speed of dropping on both sides similar; filter the obtained precipitate, add 500mL deionized water to wash 3 times, and dry at 120°C; bake in a quartz tube at 500°C for 2 hours to obtain catalyst C. Carry out the liquid-phase oxidation reaction of toluene by the reaction condition and reaction method among the embodiment 1, reaction result is listed in Table 1.

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Abstract

A composite Cu-Mn oxide catalyst used for the liquid-phase oxidization of toluene under existance of molecular oxygen is prepared from the metallic oxides, acidic oxides, alkaline oxides, or others of Cu, Mn and others chosen from Co, Zn, Ni, Cr, Fe, Ce and V through deposition. It has high oxidizing activity, selectivity and stability.

Description

technical field [0001] The invention relates to a composite oxide catalyst, in particular to a copper-manganese composite oxide catalyst. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the above-mentioned catalyst in the liquid-phase oxidation reaction of toluene. Background technique [0004] The catalytic oxidation reaction of toluene is an important method for preparing products such as benzoic acid, benzaldehyde, and benzyl alcohol. The traditional preparation methods of these products have serious pollution, poor product quality, and cumbersome processes. The preparation process of toluene oxidation reaction, especially the liquid-phase catalytic oxidation method, is simple, low in raw material cost, and environmentally friendly. [0005] Several products of toluene oxidation reaction are very important chemical products: Benzaldehyde, commonly known ...

Claims

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Application Information

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IPC IPC(8): B01J23/889C07C45/36C07C47/54
Inventor 徐杰李晓强王峰周利鹏高进
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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