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Catalyst for synthesizing isobutanol by utilizing synthesis gas as well as preparation method and application of catalyst

A catalyst and synthesis gas technology, applied in the preparation of organic compounds, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the complex product composition, low isobutanol selectivity, Harsh operating conditions and other problems, to achieve the effects of environmental protection, high selectivity, and cost reduction

Active Publication Date: 2013-09-04
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] From the existing catalyst system for synthesizing isobutanol, it is found that the catalyst with high selectivity for isobutanol in alcohol has the disadvantages of relatively harsh operating process conditions (25MPa, high temperature ≥ 400°C); when the process conditions are relatively mild, there are Among alcohols, the selectivity of isobutanol is not high, and the product composition is complicated, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 9.1gCu(NO 3 ) 2 ·3H 2 O, 59.2g ZrO(NO 3 ) 2 2H 2 O, 26.7gZn (NO 3 ) 2 ·6H 2 O, 0.7gLa (NO 3 ) 3 ·6H 2 O , 25.2 gCe(NO 3 ) 3 ·6H 2 O prepared as a mixed solution, with 3M K 2 CO 3 The solution is a precipitating agent, and the catalyst is prepared by coprecipitation. Co-precipitation was carried out under the conditions of temperature = 30°C and PH = 10. After the precipitation was completed, it was aged at the precipitation temperature for 4 hours, and suction filtered. The filter cake was washed at the precipitation temperature with 45ml water / g catalyst, and the washed catalyst was dried at 110°C for 12 hours, and calcined at 400°C for 6 hours in a muffle furnace to obtain CuO, ZrO 2 , ZnO, La 2 o 3 , CeO 2 、K 2 Catalysts with O content (wt.%) of 6.0, 54.6, 14.6, 1.0, 20.0, 3.8, respectively. Shaping and crushing to 30-40 mesh, ready for use.

[0023] Dilute H by 10 (V%) 2 (Ar is a diluent gas) is a reducing gas, at a gas space velocity of...

Embodiment 2

[0025] Weigh 9.6gCu(NO 3 ) 2 ·3H 2 O, 62.7g ZrO(NO 3 ) 2 2H 2 O, 22.5gZn (NO 3 ) 2 ·6H 2 O, 1.5gLa (NO3 ) 3 ·6H 2 O , 19.2 gCe(NO 3 ) 3 ·6H 2 O, 2.5gThO 2 (below 200 mesh) to prepare a mixed solution, and use 1M KOH solution as a precipitant to co-precipitate to prepare a catalyst. Co-precipitation was carried out under the conditions of temperature = 30°C and PH = 8. After the precipitation was completed, continue to age at the precipitation temperature for 3 hours, and filter with suction. The filter cake was washed with 90ml water / g catalyst at the precipitation temperature, the washed catalyst was dried at 110°C for 12 hours, and calcined at 450°C for 5 hours in a muffle furnace to obtain CuO, ZrO 2 , ZnO, La 2 o 3 , CeO 2 , ThO 2 、K 2 Catalysts with O content (wt.%) of 6.3, 57.8, 12.3, 2.2, 15.2, 5.0, 1.2, respectively. Shaping and crushing to 30-40 mesh, ready for use.

[0026] Dilute H by 10 (V%) 2 (Ar is a diluent gas) is a reducing gas, at a gas ...

Embodiment 3

[0028] Weigh 14.1gCu(NO 3 ) 2 ·3H 2 O, 65.1g ZrO(NO 3 ) 2 2H 2 O, 30.7gZn (NO 3 ) 2 ·6H 2 O, 1.1gLa (NO 3 ) 3 ·6H 2 O , 6.4 gCe(NO 3 ) 3 ·6H 2 O, 9.3gNi (NO 3 ) 2 ·6H 2 O prepared as a mixed solution, with 2.5M K 2 CO 3 The solution is a precipitating agent, and the catalyst is prepared by coprecipitation. Co-precipitation was carried out under the conditions of temperature = 30°C and PH = 8. After the precipitation was completed, continue to age at the precipitation temperature for 2 hours, and filter with suction. The filter cake was washed with 75ml water / g catalyst at the precipitation temperature, the washed catalyst was dried at 110°C for 12 hours, and calcined at 350°C for 5 hours in a muffle furnace to obtain CuO, ZrO 2 , ZnO, La 2 o 3 , CeO 2 , NiO, K 2 Catalysts with O content (wt.%) of 9.6, 60.0, 16.8, 1.7, 5.1, 4.8, 2.3, respectively. Shaping and crushing to 30-40 mesh, ready for use.

[0029] Dilute H with 8 (V%) 2 (Ar is a diluent gas) i...

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PUM

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Abstract

The invention relates to a catalyst for synthesizing isobutanol by utilizing synthesis gas. The catalyst comprises the following components in percentage by weight: 5.0-15.0% of copper oxide, 45.0-60.0% of zirconium oxide, 10.0-20.0% of zinc oxide, 1.0-5.0% of lanthanum oxide, 5.0-20.0% of cerium oxide, 0-5.0% of nickel oxide, 0-5.0% of samarium oxide, 0-5.0% of thorium oxide, 0-5.0% of vanadium pentoxide and 1.2-5.2% of potassium oxide. The catalyst has the advantages of high isobutanol selectivity and warm operation process condition.

Description

technical field [0001] The invention relates to a catalyst for synthesizing isobutanol, a preparation method and application thereof. Specifically, it relates to a catalyst for directional synthesis of isobutanol from synthesis gas, a preparation method and application thereof. Background technique [0002] The synthesis of methanol from synthesis gas has been industrialized, and the research and development of the synthesis of C2 oxygenates has made great progress. The research on the synthesis of C4 alcohols has focused on the synthesis of low-carbon mixed alcohols. Subsequent product separation is difficult. Therefore, the process of highly selective preparation of higher alcohols from synthesis gas has attracted widespread attention. As a chemical, isobutanol is widely used in the separation of rare earths, and is an excellent clean fuel. It can be added to gasoline instead of methyl tert-butyl ether, mixed with diesel to reduce the PM2.5 value, and can also be added t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847C07C31/12C07C29/156
Inventor 谭猗生解红娟武应全寇永利潘俊轩
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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