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Amorphous CuxMn1-xCO3 catalytic material, preparation method and application of amorphous CuxMn1-xCO3 catalytic material in preparation of acetophenone

A cuxmn1-xco3, catalytic material technology, applied in the field of preparation, amorphous CuxMn1-xCO3 catalytic material, preparation of acetophenone, can solve the problems of complex preparation process, small specific surface area, unfavorable catalytic efficiency, etc., and achieve high catalytic efficiency , the effect of large specific surface area

Pending Publication Date: 2022-01-21
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These catalysts have the following shortcomings and deficiencies, such as high cost of raw materials, complicated preparation process, and difficulty in recycling; the above catalysts are usually in a crystalline state, and the corresponding specific surface area is small, and there are few catalytic sites, which is not conducive to obtaining excellent Catalytic efficiency; moreover, the conversion of ethylbenzene is often lower than 65%, and the selectivity of acetophenone is often lower than 80%

Method used

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  • Amorphous CuxMn1-xCO3 catalytic material, preparation method and application of amorphous CuxMn1-xCO3 catalytic material in preparation of acetophenone
  • Amorphous CuxMn1-xCO3 catalytic material, preparation method and application of amorphous CuxMn1-xCO3 catalytic material in preparation of acetophenone
  • Amorphous CuxMn1-xCO3 catalytic material, preparation method and application of amorphous CuxMn1-xCO3 catalytic material in preparation of acetophenone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The amorphous Cu proposed by the present invention 0.02 mn 0.98 CO 3 The specific preparation process of the catalytic material is as follows:

[0036] (1) In 100mL of water, Cu(NO 3 ) 2 ·6H 2 O and Mn(NO 3 ) 2 ·6H 2 O is configured into a mixed solution with a concentration of 0.2mol / L and 9.8mol / L respectively; in another 100mL of water, (NH 4 ) 2 CO 3 Configured as a solution with a concentration of 10mol / L;

[0037] (2) (NH 4 ) 2 CO 3 The solution is quickly added to the copper-manganese mixed solution, and the precipitate suspension is continuously produced under magnetic stirring;

[0038] (3) Quickly add the precipitation suspension into 200mL liquid nitrogen and freeze for 10min;

[0039] (4) Take the product out of liquid nitrogen, wash with water, filter, and dry in a vacuum oven at 40°C for 12 hours to obtain amorphous Cu x mn 1-x CO 3 catalytic material.

[0040] The above amorphous Cu 0.02 mn 0.98 CO 3 The application of catalytic mate...

Embodiment 2

[0042] The amorphous Cu proposed by the present invention 0.04 mn 0.96 CO 3 The specific preparation process of the catalytic material is as follows:

[0043] (1) In 100mL of water, Cu(NO 3 ) 2 ·6H 2 O and Mn(NO 3 ) 2 ·6H 2 O is configured as a mixed solution, and the concentrations are 0.2mol / L and 3.8mol / L respectively; in another 100mL water, (NH 4 ) 2 CO 3 Configured as a solution with a concentration of 4.0mol / L;

[0044] (2) (NH 4 ) 2 CO 3 The solution is quickly added to the copper-manganese mixed solution, and the precipitate suspension is continuously produced under magnetic stirring;

[0045] (3) The precipitated suspension was quickly added to 200 mL of liquid nitrogen and frozen for 15 min;

[0046] (4) Take the product out of liquid nitrogen, wash with water, filter, and dry in a vacuum oven at 40°C for 12 hours to obtain amorphous Cu x mn 1-x CO 3 catalytic material.

[0047] The above amorphous Cu 0.04 mn 0.94 CO 3 The application of catalyti...

Embodiment 3

[0049] The amorphous Cu proposed by the present invention 0.06 mn 0.94 CO 3 The specific preparation process of the catalytic material is as follows:

[0050] (1) In 100mL of water, Cu(NO 3 ) 2 ·6H 2 O and Mn(NO 3 ) 2 ·6H 2 O is configured as a mixed solution, and the concentrations are 0.2mol / L and 3.1mol / L respectively; in another 100mL water, (NH 4 ) 2 CO 3 Configured as a solution with a concentration of 3.3mol / L;

[0051] (2) (NH 4 ) 2 CO 3 The solution is quickly added to the copper-manganese mixed solution, and the precipitate suspension is continuously produced under magnetic stirring;

[0052] (3) The precipitated suspension was quickly added to 200 mL of liquid nitrogen and frozen for 20 min;

[0053] (4) Take the product out of liquid nitrogen, wash with water, filter, and dry in a vacuum oven at 40°C for 12 hours to obtain amorphous Cu x mn 1-x CO 3 catalytic material.

[0054] The above amorphous Cu 0.06 mn 0.94 CO 3 The application of cataly...

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Abstract

The invention discloses an amorphous CuxMn1-xCO3 catalytic material, a preparation method and application of the amorphous CuxMn1-xCO3 catalytic material in preparation of acetophenone, and the specific preparation method comprises the following steps: S11, dissolving a copper salt and a manganese salt in deionized water to form a copper-manganese mixed aqueous solution; s12, quickly adding a carbonate solution into the copper-manganese mixed water solution in the step S11 at room temperature, and continuously forming a precipitate suspension while stirring; s13, quickly adding the precipitate turbid liquid in the S12 into liquid nitrogen, and freezing; and S14, taking out the frozen product in the step S13, washing with water, filtering, and drying to obtain the amorphous CuxMn1-xCO3 catalytic material. The prepared catalytic material is in an amorphous state and has a larger specific surface area, so that a better catalytic effect is achieved, the conversion rate of ethylbenzene exceeds 80% in the process of catalyzing ethylbenzene to prepare acetophenone, and the selectivity of an acetophenone product exceeds 90%.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to amorphous Cu x mn 1-x CO 3 Catalytic materials, preparation methods and their application in the preparation of acetophenone. Background technique [0002] At present, the system for preparing acetophenone by liquid-phase oxidation of ethylbenzene mainly involves catalysts including cobalt acetate, metal porphyrin, transition metal complex, metal phthalocyanine, molecular sieve, hydrotalcite, heteropoly compound, etc. These catalysts have the following disadvantages and deficiencies, such as high cost of raw materials, complicated preparation process, difficult to recycle, etc.; the above catalysts are usually in a crystalline state, the corresponding specific surface area is small, and there are few catalytic sites, which is not conducive to obtaining excellent Catalytic efficiency; moreover, the conversion rate of ethylbenzene is often lower than 65%, and the sel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232B01J35/10B01J37/03B01J37/32C01G45/00C07C45/36C07C49/78
CPCB01J27/232B01J37/031B01J37/32C01G45/006C07C45/36C01P2002/72C01P2004/04C01P2002/70B01J35/61C07C49/78
Inventor 陈祥迎汪清胡一凡李平范磊张忠洁童庆军王艳陈新华
Owner HEFEI UNIV OF TECH
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