Copper catalyst for vapor catalytic dehydrogenation of methyl isobutyl alcohol and its preparation process and application method

A technology of methyl isobutyl alcohol and copper-based catalysts, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., to achieve good dehydrogenation stability and preparation The method is mature and the effect of long life

Inactive Publication Date: 2009-05-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] At present, there is no copper-based catalyst used in the dehydrogenation of methyl isobutyl alcohol

Method used

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  • Copper catalyst for vapor catalytic dehydrogenation of methyl isobutyl alcohol and its preparation process and application method
  • Copper catalyst for vapor catalytic dehydrogenation of methyl isobutyl alcohol and its preparation process and application method
  • Copper catalyst for vapor catalytic dehydrogenation of methyl isobutyl alcohol and its preparation process and application method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Preparation of copper-based catalyst 1 by co-precipitation method

[0032] 5 parts Cu(NO 3 ) 2 ·3H 2 O, 10 parts of Zn(NO 3 ) 2 ·6H 2 O, 5 parts of Al(NO 3 ) 3 9H 2 O, 90 parts of deionized water, stir to make it evenly mixed, and then heat to 80°C. 20 parts Na 2 CO 3 , 80 parts deionized water, stirred to get 20% Na 2 CO 3aqueous solution. Constantly stir the above nitrate aqueous solution, add Na dropwise within 40min 2 CO 3 Solution, make it fully react, and keep stirring at the same temperature for 1-2h, check the pH value of the solution with pH test paper, add an appropriate amount of Na 2 CO 3 Solution Adjust the pH of the solution to 7.0. The obtained precipitate was aged and filtered, washed several times with deionized water, dried at 110°C, calcined at 300-450°C for 4 hours, and formed into a black cylindrical granular catalyst with a diameter of Φ5×5mm.

Embodiment 2

[0033] Embodiment 2: coprecipitation method prepares copper-based catalyst 2

[0034] 10 parts of Cu(NO 3 ) 2 ·3H 2 O, 5 parts of Zn(NO 3 ) 2 ·6H 2 O, 1 part of Al(NO 3 ) 3 9H 2 O, 83 parts of deionized water, stir to mix evenly, and then heat to 80°C. 10 parts Na 2 CO 3 , 90 parts deionized water, stirred to get 10% Na 2 CO 3 aqueous solution. Constantly stir the above nitrate aqueous solution, add Na dropwise within 40min 2 CO 3 Solution, make it fully react, and keep stirring at the same temperature for 1-2h, check the pH value of the solution with pH test paper, add an appropriate amount of Na 2 CO 3 Solution Adjust the pH of the solution to 7.0. The obtained precipitate was aged and filtered, washed several times with deionized water, dried at 110°C, calcined at 300-450°C for 4 hours, and formed into a black cylindrical granular catalyst with a diameter of Φ5×5mm.

Embodiment 3

[0035] Embodiment 3: coprecipitation method prepares copper-based catalyst 3

[0036] 7 parts Cu(NO 3 ) 2 ·3H 2 O, 3 parts of Zn(NO 3 ) 2 ·6H 2 O, 1 part of Al(NO 3 ) 3 9H 2 O, 89 parts of deionized water, stirred to make it evenly mixed, and then heated to 80°C. 5 Na 2 CO 3 , 95 parts deionized water, stirred to get 5% Na 2 CO 3 aqueous solution. Constantly stir the above nitrate aqueous solution, add Na dropwise within 40min 2 CO 3 Solution, make it fully react, and keep stirring at the same temperature for 1-2h, check the pH value of the solution with pH test paper, add an appropriate amount of Na 2 CO 3 Solution Adjust the pH of the solution to 7.0. The obtained precipitate was aged and filtered, washed several times with deionized water, dried at 120°C, calcined at 300-450°C for 4 hours, and formed into a black cylindrical granular catalyst with a diameter of Φ5×5mm.

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Abstract

The copper catalyst for vapor catalytic dehydrogenation of methyl isobutyl alcohol is prepared with the materials including Cu(NO3)2.3H2O 5-10 weight portions, Zn(NO3)2.6H2O 1-10 weight portions, Al(NO3)3.9H2O 1-5 weight portions and alkaline carbonate precipitant 5-20 weight portions, and through co-precipitation and roasting formation. The copper catalyst is used in dehydrogenating methyl isobutyl alcohol to prepare methyl isobutyl ketone in tubular fixed bed reactor. The copper catalyst has relatively high dehydrogenating stability and relatively long service life; results in relatively low reaction temperature of dehydrogenating methyl isobutyl alcohol to synthesize methyl isobutyl ketone, single pass conversion of 60-82 %, selectivity of 96-99 %, multiple pass conversion over 99 % and multiple pass reaction selectivity over 98 %; and may be used in industrial production.

Description

technical field [0001] The invention relates to a copper-based catalyst for synthesizing methyl isobutyl ketone by gas-phase catalytic dehydrogenation of methyl isobutyl alcohol, a preparation method of the catalyst and an application method in the dehydrogenation process of methyl isobutyl alcohol. Background technique [0002] Antioxidant 4020, the chemical name is N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, widely used in aircraft, automobile and bicycle tires, wires, etc., for waterproofing Among the rubber products, it has particularly excellent protective properties. Its structural formula is: [0003] [0004] It can be obtained by catalytic hydrogenation condensation of 4-aminodiphenylamine (RT base) and methyl isobutyl ketone under high pressure, or three-step reduction with p-aminophenol, methyl isobutyl ketone, formic acid and aniline . The one-step method with RT base and methyl isobutyl ketone as raw materials has a short flow process and easy acce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/835B01J37/03C07C45/29C07C49/04
Inventor 吴素芳李明
Owner ZHEJIANG UNIV
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