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Catalyst for preparing crotonyl alcohol by selective hydrogenation of crotonaldehyde and preparation method of catalyst

A selective, catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of easy deactivation and poor stability of Ir-based catalysts

Inactive Publication Date: 2015-03-11
ZHEJIANG NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the shortcomings of easy deactivation and poor stability of most existing Ir-based catalysts for preparing crotyl alcohol by selective hydrogenation of gas-phase crotonaldehyde, and provides a modified catalyst with high catalytic efficiency, good reaction selectivity and good reaction stability. Catalyst for preparing crotyl alcohol by selective hydrogenation of crotonaldehyde and preparation method thereof

Method used

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  • Catalyst for preparing crotonyl alcohol by selective hydrogenation of crotonaldehyde and preparation method of catalyst
  • Catalyst for preparing crotonyl alcohol by selective hydrogenation of crotonaldehyde and preparation method of catalyst
  • Catalyst for preparing crotonyl alcohol by selective hydrogenation of crotonaldehyde and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] ① SiO according to the total mass percentage of Fe-Cr 2 0.2% of Fe / Cr, the mass ratio of Fe / Cr is 1:1, weigh a certain amount of Fe(NO 3 ) 3 9H 2 O and Cr(NO 3 ) 3 9H 2 O, add an appropriate amount of water to dissolve and mix well, and the corresponding amount of SiO 2 Add the powder into the mixed solution, stir evenly, and soak at room temperature for 12 hours;

[0019] ② Afterwards, evaporate the liquid in a water bath at 90°C, and bake it in an air atmosphere at 500°C for 4 hours to obtain Fe-Cr / SiO 2 carrier.

[0020] ③ According to the mass percentage of Ir, it is Fe-Cr / SiO 2 3% of the carrier, the mass percentage of Fe is Fe-Cr / SiO 2 0.3% of the carrier, absorb a certain amount of Ir(acac) 3 and Fe(acac) 3 Benzene solution, and mix well, the corresponding amount of Fe-Cr / SiO 2 The carrier is added to the mixed solution, stirred evenly, and soaked at room temperature for 3 hours;

[0021] ④ After that, evaporate the liquid to dryness in a water bath ...

Embodiment 2

[0025] ① SiO according to the mass percentage of Fe-Cr 2 0.7% of Fe / Cr, the mass ratio of Fe / Cr is 1:1, weigh a certain amount of Fe(NO 3 ) 3 9H 2 O and Cr(NO 3 ) 3 9H 2 O, add an appropriate amount of water to dissolve and mix well, and the corresponding amount of SiO 2 Add the powder into the mixed solution, stir evenly, and soak at room temperature for 12 hours;

[0026] ② Afterwards, evaporate the liquid in a water bath at 90°C, and bake it in an air atmosphere at 500°C for 4 hours to obtain Fe-Cr / SiO 2 carrier.

[0027] ③ According to the mass percentage of Ir, it is Fe-Cr / SiO 2 3% of the carrier, the mass percentage of Fe is Fe-Cr / SiO 2 0.3% of the carrier, absorb a certain amount of Ir(acac) 3 and Fe(acac) 3 Benzene solution, and mix well, the corresponding amount of Fe-Cr / SiO 2 The carrier is added to the mixed solution, stirred evenly, and soaked at room temperature for 3 hours;

[0028] ④ After that, evaporate the liquid to dryness in a water bath at 90°C,...

Embodiment 3

[0032] ① SiO according to the mass percentage of Fe-Cr 2 1.0% of Fe / Cr, the mass ratio of Fe / Cr is 1:1, weigh a certain amount of Fe(NO 3 ) 3 9H 2 O and Cr(NO 3 ) 3 9H 2 O, add an appropriate amount of water to dissolve and mix well, and the corresponding amount of SiO 2 Add the powder into the mixed solution, stir evenly, and soak at room temperature for 12 hours;

[0033] ② Afterwards, evaporate the liquid in a water bath at 90°C, and bake it in an air atmosphere at 500°C for 4 hours to obtain Fe-Cr / SiO 2 carrier.

[0034] ③ According to the mass percentage of Ir, it is Fe-Cr / SiO 2 3% of the carrier, the mass percentage of Fe is Fe-Cr / SiO 2 0.3% of the carrier, absorb a certain amount of Ir(acac) 3 and Fe(acac) 3 Benzene solution, and mix well, the corresponding amount of Fe-Cr / SiO 2 The carrier is added to the mixed solution, stirred evenly, and soaked at room temperature for 3 hours;

[0035] ④ After that, evaporate the liquid to dryness in a water bath at 90°...

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Abstract

The invention relates to a catalyst for preparing crotonyl alcohol by selective hydrogenation of crotonaldehyde and a preparation method of the catalyst. The catalyst comprises a Fe-Cr / SiO2 carrier, Ir and Fe, wherein the total mass percentage of Fe-Cr in the Fe-Cr / SiO2 carrier is 0.2-1.5% of SiO2, the mass ratio of Fe to Cr is 1 to 1, the mass percentage of Ir is 3% of the Fe-Cr / SiO2 carrier, and the mass percentage of Fe is 0.1-1% of the Fe-Cr / SiO2 carrier. The catalyst is prepared by adopting an impregnation method; the preparation method comprises the steps of preparing the carriers, impregnating the 2 carriers into a mixed benzene solution of Ir(acac)3 and Fe(acac)3, evaporating to dryness in a water bath, calcining and reducing. The catalyst is high in catalytic efficiency and good in reaction selectivity and reaction stability.

Description

technical field [0001] The invention relates to the field of chemical catalysts, in particular to a catalyst for preparing crotyl alcohol through selective hydrogenation of crotonaldehyde and a preparation method thereof. Background technique [0002] a,b-unsaturated aldehyde is a multifunctional compound with C=C bond and C=O bond at the same time. It is an important chemical raw material. The product a,b-unsaturated Saturated alcohols are raw materials and intermediates of spices, medicines, herbicides, coatings, etc., and are widely used in the field of fine chemicals. Crotyl alcohol is a representative compound among a,b-unsaturated alcohols, and is a very important intermediate in organic synthesis. It is widely used in the manufacture of n-butanol, plastics, plasticizers, herbicides, paints and pesticides, etc. , Therefore, the catalytic selective hydrogenation of crotonaldehyde to produce crotyl alcohol is of great economic value. [0003] The bond energy of the C=C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C07C33/03C07C29/141
Inventor 罗孟飞喻琴洪庆红罗策琪宋宇鹏
Owner ZHEJIANG NORMAL UNIVERSITY
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